Sunday, June 30, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 30


DTC B0019 04



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Open Circuit



DTC B0019 0D



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Resistance Above Threshold



DTC B0019 0E



- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Resistance Below Threshold



DTC B0020 01



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Battery



DTC B0020 02



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Ground



DTC B0020 04



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Open Circuit



DTC B0020 0D



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Resistance Above Threshold



DTC B0020 0E



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Resistance Below Threshold



DTC B0021 01



- Passenger Side Seat Air Bag Deployment Loop Short to Battery



DTC B0021 02



- Passenger Side Seat Air Bag Deployment Loop Short to Ground



DTC B0021 04



- Passenger Side Seat Air Bag Deployment Loop Open Circuit



DTC B0021 0D



- Passenger Side Seat Air Bag Deployment Loop Resistance Above Threshold



DTC B0021 0E



- Passenger Side Seat Air Bag Deployment Loop Resistance Below Threshold



DTC B0022 01



- RF Pretensioner Deployment Loop Short to Battery



DTC B0022 02



- Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Ground



DTC B0022 04



- Passenger Seat Belt Retractor Pretensioner Deployment Loop Open Circuit



DTC B0022 0D



- Passenger Seat Belt Retractor Pretensioner Deployment Loop Resistance Above Threshold



DTC B0022 0E



- Passenger Seat Belt Retractor Pretensioner Deployment Loop Resistance Below Threshold



DTC B0023 01



- Right Roof Rail Air Bag Deployment Loop Short to Battery



DTC B0023 02



- Right Roof Rail Air Bag Deployment Loop Short to Ground



DTC B0023 04



- Right Roof Rail Air Bag Deployment Loop Open Circuit



DTC B0023 0D



- Right Roof Rail Air Bag Deployment Loop Resistance Above Threshold



DTC B0023 0E



- Right Roof Rail Air Bag Deployment Loop Resistance Below Threshold

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 394


DTC B1441 01



- Device Ignition OFF, RUN, and CRANK Circuit Short to Battery



DTC B1441 06



- Device Ignition OFF, RUN, and CRANK Circuit Short to Ground or Open



Diagnostic Fault Information



Circuit/System Description



This vehicles power mode master (PMM) is the body control module (BCM). The ignition switch is a low current switch with multiple discrete



ignition switch signals to the PMM for determination of the power mode. The PMM receives the ignition switch signals, and additionally a reference



voltage signal from the BCM, through the ignition switch, and back to the BCM. There are redundancies within the PMM system that can allow



operation of certain subsystems when there are faults in the ignition switch circuits. Other information such as serial data input from other modules



and DTCs is also used to determine what power mode signals and information is transmitted by the PMM. The BCM logic uses all this information



to identify the operators desired power mode and activate specific discrete signals, and serial data messages for the operation of many different



subsystems as necessary. Other modules which have switched voltage inputs may operate in a default mode if the PMM serial data message does not



match what the individual module can see from its own connections.



The PMM will activate relays and other direct outputs of the PMM as needed according to the calculated power mode. Several relays controlled by



the BCM are switched ignition voltage outputs the are pass through circuits within the BCM directly from the ignition switch. If these circuits short



to ground, the fuse to the ignition switch will open.



Conditions for Running the DTC



Ignition switch is in the START position.



Conditions for Setting the DTC



B1441 01



Off/run/crank voltage circuit is shorted to voltage for more than 2 seconds.



B1441 06



Off/run/crank voltage circuit is open for more than 2 seconds.



Action Taken When the DTC Sets



* The BCM operates in a fail-safe power mode dependent on the last valid power mode detected and the state of the engine run flag data on the



GMLAN serial data communications circuits.



* The other modules on the vehicle operate in a fail-safe power mode dependent on the last valid power mode transmitted by the BCM and the



state of the engine run flag on the GMLAN serial data communications circuits.



Conditions for Clearing the DTC



* A current DTC clears when the malfunction is no longer present.



* A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.



Diagnostic Aids



* A short to ground in the accessory wakeup serial data circuit will cause an open fuse to the ignition switch. DTC U1814 should be current.



* A short to ground in the run/crank ignition 1 voltage circuit of the run crank relay will cause an open fuse to the ignition switch. DTC B1428



should be current.



* The power modes and controls are determined using BCM logic. Comparing the Body Control Module Power Mode data display parameters



listed in Circuit/System Verification will determine if there is a power mode fault.



Reference Information



Schematic Reference



* Body Control System Schematics (See: Body and Frame/Body Control Systems/Diagrams/Electrical Diagrams)



* Power Distribution Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System



Diagram/Power Distribution Schematics)

Saturday, June 29, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 224


Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



Ignition ON, command the appropriate actuator in both directions with a scan tool. The scan tool door position parameter reading should be between



3 and 253 counts.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the appropriate actuator.



2. Test for less than 1 ohm between the low reference circuit terminal 7 and ground.



锟斤拷 If greater than the specified range, test the low reference circuit for an open/high resistance.



3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 10 and ground.



锟斤拷 If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance.



锟斤拷 If greater than the specified range, test the 5-volt reference circuit for a short to voltage.



4. Verify the appropriate scan tool parameter is less than 4 counts.



锟斤拷 If greater than the specified range, test the signal circuit terminal 9 for a short to ground. If the circuit tests normal, replace the HVAC



control module.



5. Install a 3-amp fused jumper wire between the signal circuit terminal 9 and the low reference circuit terminal. Verify the appropriate scan tool



parameter is greater than 250 counts.



锟斤拷 If less than the specified range, test the signal circuit for a short to voltage or an open/high resistance.



6. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 5 and ground.



锟斤拷 If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.



7. Install a DMM between the actuator control circuit terminal 6 and ground. While monitoring the DMM, use the scan tool to command the



appropriate actuator from one direction to the other. The voltage on the control circuit should move from 0 volts in one direction to 5 volts in



the other direction and 2.5 volts in the at rest state.



锟斤拷 If the voltage does not change, test the control circuit for an open, short to voltage or short to ground. If circuit tests normal replace the



HVAC control module.



8. If all circuits test normal, replace the actuator.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Mode Valve Actuator Replacement (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/HVAC -



Automatic/Mode Valve Actuator Replacement)



* Temperature Valve Actuator Replacement - Left Side (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and



Repair/HVAC - Automatic/Temperature Valve Actuator Replacement - Left Side)



* Temperature Valve Actuator Replacement - Right Side (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and



Repair/HVAC - Automatic/Temperature Valve Actuator Replacement - Right Side)



* Auxiliary Temperature Valve Actuator Replacement (Behr) (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service



and Repair/HVAC - Automatic/Auxiliary Temperature Valve Actuator Replacement (Behr))Auxiliary Temperature Valve Actuator



Replacement (Delphi) (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/HVAC -



Automatic/Auxiliary Temperature Valve Actuator Replacement (Delphi))



* Auxiliary Mode Valve Actuator Replacement (Behr) (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and



Repair/HVAC - Automatic/Auxiliary Mode Valve Actuator Replacement (Behr))Auxiliary Mode Valve Actuator Replacement (Delphi) (See:



Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/HVAC - Automatic/Auxiliary Mode Valve Actuator



Replacement (Delphi))



* Control Module References (See: Testing and Inspection/Programming and Relearning) for HVAC control module replacement, setup, and

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 586


3. Verify that a test lamp illuminates between the B+ circuit terminal 86 and ground.



锟斤拷 If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the



B+ circuit fuse is open, test the control circuit terminal 87 for a short to ground. If the circuit tests normal, test or replace the fog lamp



relay.



4. Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground.



锟斤拷 If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.



5. Disconnect the harness connector at the appropriate park lamp.



6. Test for less than 5 ohm between the park lamp ground circuit terminal and ground.



锟斤拷 If greater than the specified range, test the ground circuit for an open/high resistance.



7. Connect the harness connector at the park lamp.



8. Connect a 15 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87. Verify the park lamp is activated.



锟斤拷 If the park lamp does not activate and the circuit fuse is good, test the control circuit for an open/high resistance. If the circuit tests normal,



test or replace the park lamp.



锟斤拷 If the park lamp does not activate and the circuit fuse is open, test the control circuit for a short to ground. If the circuit tests normal, test or



replace the park lamp.



9. Connect a test lamp between the B+ circuit terminal 86 and the control circuit terminal 85.



10. Command the Parking Lamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded



states.



锟斤拷 If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.



锟斤拷 If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace



the BCM.



11. If all circuits test normal, test or replace the park lamp relay.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay



Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power



Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))



* Headlamp Replacement (Cadillac Escalade) (See: Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp



Replacement (Cadillac Escalade))Headlamp Replacement (GMC Yukon Two-mode Hybrid) (See: Lighting and Horns/Headlamp/Service



and Repair/Removal and Replacement/Headlamp Replacement (GMC Yukon Two-mode Hybrid))Headlamp Replacement (Yukon) (See:



Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Replacement (Yukon))Headlamp Replacement



(Chevrolet Tahoe Two-mode Hybrid) (See: Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp



Replacement (Chevrolet Tahoe Two-mode Hybrid))Headlamp Replacement (Tahoe, Avalanche) (See: Lighting and Horns/Headlamp/Service



and Repair/Removal and Replacement/Headlamp Replacement (Tahoe, Avalanche))Headlamp Replacement (Escalade PLATINUM) (See:



Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Replacement (Escalade Platinum))Headlamp



Replacement (Non HID) (See: Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Replacement (Non



HID))



* Repeater Lamp Replacement (Escalade) (See: Lighting and Horns/Turn Signals/Turn Signal Lamp/Service and Repair/Repeater Lamp



Replacement (Escalade))



* Front Side Marker Lamp Replacement (Yukon) (See: Lighting and Horns/Marker Lamp/Service and Repair/Front Side Marker Lamp



Replacement (Yukon))Front Side Marker Lamp Replacement (Tahoe, Avalanche) (See: Lighting and Horns/Marker Lamp/Service and



Repair/Front Side Marker Lamp Replacement (Tahoe, Avalanche))



* Parking and Turn Signal Lamp Replacement (Tahoe, Avalanche) (See: Lighting and Horns/Parking Lamp/Service and Repair/Parking and



Turn Signal Lamp Replacement (Tahoe, Avalanche))Parking and Turn Signal Lamp Replacement (Yukon) (See: Lighting and Horns/Parking



Lamp/Service and Repair/Parking and Turn Signal Lamp Replacement (Yukon))



* Tail Lamp Replacement (Avalanche) (See: Lighting and Horns/Tail Lamp/Service and Repair/Tail Lamp Replacement (Avalanche))Tail



Lamp Replacement (GMC Yukon Two-Mode Hybrid) (See: Lighting and Horns/Brake Lamp/Brake Light Bulb/Service and Repair/Tail



Lamp Replacement (GMC Yukon Two-Mode Hybrid))Tail Lamp Replacement (Chevrolet Tahoe Two-Mode Hybrid) (See: Lighting and



Horns/Brake Lamp/Brake Light Bulb/Service and Repair/Tail Lamp Replacement (Chevrolet Tahoe Two-Mode Hybrid))Tail Lamp



Replacement (Cadillac) (See: Lighting and Horns/Tail Lamp/Service and Repair/Tail Lamp Replacement (Cadillac))Tail Lamp Replacement



(Tahoe, Yukon) (See: Lighting and Horns/Brake Lamp/Brake Light Bulb/Service and Repair/Tail Lamp Replacement (Tahoe/Yukon))



* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 437


* Power Seat Switch Replacement (with HP2) ()Power Seat Switch Replacement (without HP2) ()



* Control Module References (See: Testing and Inspection/Programming and Relearning) for MSM replacement, setup, and programming



B1760



DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B1735 01



- Seat Front Up Switch Circuit Short to Battery



DTC B1740 01



- Seat Front Down Switch Circuit Short to Battery



DTC B1745 01



- Seat Rear Up Switch Circuit Short to Battery



DTC B1750 01



- Seat Rear Down Switch Circuit Short to Battery



DTC B1755 01



- Seat Assembly Forward Switch Circuit Short to Battery



DTC B1760 01



- Seat Assembly Rearward Switch Circuit Short to Battery



DTC B1815 01



- Seat Recline Forward Switch Circuit Short to Battery



DTC B1820 01



- Seat Recline Rearward Switch Circuit Short to Battery



Diagnostic Fault Information

Friday, June 28, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 392


* Body Control System Schematics (See: Body and Frame/Body Control Systems/Diagrams/Electrical Diagrams)



* Power Distribution Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System



Diagram/Power Distribution Schematics)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



Power Mode Description and Operation (See: Power and Ground Distribution/Description and Operation/Power Mode Description and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



1. Verify that the following DTCs are not set: U1814, B1428.



锟斤拷 If either of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code



Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).



2. With a scan tool, access Body Control Module, Power Mode data display list and compare all parameters listed with the corresponding



ignition key position. The PMM Power Mode Parameters table below illustrates the correct state of these input parameters (circuits) in



correspondence to the ignition switch position. The circuits which the individual parameters are related to are in parentheses.



Circuit/System Testing



Note: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.



1. Inspect for an open Ign Switch fuse. The fuse should be OK.



锟斤拷 If the fuse is open, test the following circuits for a short to ground, if all circuits test OK, replace the BCM.



* Battery positive voltage of the ignition switch



* Accessory voltage



* Off/Run/Crank voltage



* Ignition 1 voltage



* Accessory wakeup serial data (BCM output)



* Run/crank ignition 1 voltage (BCM output)



2. Disconnect the harness connector at the ignition switch.



3. Verify that a test lamp illuminates between the B+ circuit terminal 4 and ground.



锟斤拷 If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.



Note: The ignition switch component test must be preformed before proceeding with this test to verify the integrity of the switch.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 89


Circuit/System Description



The Assist Step Control Module controls the running board actuators to extend or retract the running boards. Each actuator consists of an



electric motor and a potentiometer. The module supplies a low reference and 10-volt reference source voltage to the potentiometer. The Assist



Step Control Module monitors the voltage drop across the potentiometer on the position signal circuit. When the actuator shaft rotates, the



voltage on the position signal circuit changes. The Assist Step Control Module supplies the actuator motor with a 12-volt control circuit and a



ground control circuit. The assist step module controls the direction of the actuator by changing the polarity of the control circuits.



Conditions for Running the DTC

Thursday, June 27, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 647


Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the center high mounted stop lamp.



2. Test for less than 5.0 ohm between the ground circuit terminal B and ground.



锟斤拷 If greater than the specified range, test the ground circuit for an open/high resistance.



3. Connect a test lamp between the control circuit terminal A and the ground circuit terminal B.



4. Ignition ON, turn the stop lamps ON and OFF by applying and releasing the brake pedal. The test lamp should turn ON and OFF when



changing between the selected states.



锟斤拷 If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.



锟斤拷 If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace



the BCM.



5. If all circuits test normal, replace the center high mounted stop lamp.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Tail Lamp Bulb Replacement (Yukon) (See: Lighting and Horns/Tail Lamp/Tail Light Bulb/Service and Repair/Tail Lamp Bulb



Replacement (Yukon))Tail Lamp Bulb Replacement (Cadillac) (See: Lighting and Horns/Tail Lamp/Tail Light Bulb/Service and Repair/Tail



Lamp Bulb Replacement (Cadillac))Tail Lamp Bulb Replacement (Tahoe, Avalanche) (See: Lighting and Horns/Tail Lamp/Tail Light



Bulb/Service and Repair/Tail Lamp Bulb Replacement (Tahoe, Avalanche))Tail Lamp Bulb Replacement (Tahoe) (See: Lighting and



Horns/Brake Lamp/Brake Light Bulb/Service and Repair/Tail Lamp Bulb Replacement (Tahoe))Tail Lamp Bulb Replacement (Yukon



Two-mode Hybrid) (See: Lighting and Horns/Brake Lamp/Brake Light Bulb/Service and Repair/Tail Lamp Bulb Replacement (Yukon



Two-mode Hybrid))



* High Mount Stop Lamp Replacement (Yukon Two-mode Hybrid) (See: Lighting and Horns/Center Mounted Brake Lamp/Service and



Repair/High Mount Stop Lamp Replacement (Yukon Two-mode Hybrid))High Mount Stop Lamp Replacement (Yukon) (See: Lighting and



Horns/Center Mounted Brake Lamp/Service and Repair/High Mount Stop Lamp Replacement (Yukon))High Mount Stop Lamp Replacement



(Avalanche) (See: Lighting and Horns/Center Mounted Brake Lamp/Service and Repair/High Mount Stop Lamp Replacement (Avalanche)



)High Mount Stop Lamp Replacement (Escalade) (See: Lighting and Horns/Center Mounted Brake Lamp/Service and Repair/High Mount



Stop Lamp Replacement (Escalade))



* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming



B3567



DTC B3567



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B3567 01



- Driver Information Center (DIC) Select Switch Circuit Short To Battery



DTC B3567 59



- Driver Information Center (DIC) Select Switch Circuit/Component Protection Time-Out



Diagnostic Fault Information

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 39


Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or replacement of



the affected component/connector.



* Seat belt pretensioner



* Passenger instrument panel airbag



* Side air bag



* Roof rail airbag



* SDM



* SDM wiring harness connector



Note: The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an



audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.



If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct the



high resistance condition due to terminal fretting corrosion.



Observe the scan tool Deployment Loop Resistance parameters while moving the harness near each connector listed below. The reading should stay



consistently between 1.7 and 4.2 ohm without any drop outs or spikes.



* Passenger instrument panel air bag



* Roof rail air bag



* Seat side air bag



* Seat belt pretensioner



* Any inline harness



* SDM



If the reading is erratic while moving the harness, perform the following;



* Inspect each connector terminal for damage or corrosion and repair as necessary.



* Apply Nyogel lubricant 760G to each connector terminal.



* Insure each connector and CPA is correctly seated.



Circuit/System Testing



DTC B0014-B0018 or B0021-B0045



1. Ignition OFF, disconnect the scan tool and disconnect the harness connector at the appropriate air bag or seat belt retractor pretensioner.



2. With the appropriate load tool adaptor, connect special tool J 38715-A in place of the air bag or seat belt retractor pretensioner.



3. Wait for 120 seconds and then test for greater than 25 ohm between the control circuit terminals listed below.



* Left roof rail air bag terminal 1 and 2



* Right roof rail air bag terminal 1 and 2



* Driver seat side air bag terminal 1 and 2



* Passenger seat side air bag terminal 1 and 2



* Driver seat belt retractor pretensioner terminal 1 and 2



* Passenger seat belt retractor pretensioner terminal 1 and 2



锟斤拷 If less than the specified range, test for a short between the control circuits, check each connector and CPA to ensure that the shorting bars



are lifted. If the circuits and shorting bars tests normal, replace the SDM.



4. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground:



* Roof rail air bag control circuit terminal 1



* Roof rail air bag control circuit terminal 2



* Seat side air bag control circuit terminal 1



* Seat side air bag control circuit terminal 2



* Retractor pretensioner control circuit terminal 1



* Retractor pretensioner control circuit terminal 2



锟斤拷 If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the SDM.



5. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:



* Roof rail air bag control circuit terminal 1



* Roof rail air bag control circuit terminal 2



* Seat side air bag control circuit terminal 1



* Seat side air bag control circuit terminal 2



* Retractor pretensioner control circuit terminal 1



* Retractor pretensioner control circuit terminal 2

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 149


SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/Description and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.



Circuit/System Testing



Important: Refer to SIR Service Precautions (See: Restraints and Safety Systems/Air Bag Systems/Service Precautions/Technician Safety



Information).



When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of



the affected component/connector:



* Front end sensor



* SDM module



* Front end sensor wiring harness connector



* SDM wiring harness connector



1. Ignition OFF, disconnect the harness connector at the appropriate sensor.



2. Disconnect the harness connector at the SDM.



3. Ignition ON, test for less than 1 volt between the following signal circuit and ground.



* Right front end sensor terminal 1



* Left front end sensor terminal 1



* Right front side impact sensor terminal B



* Left front side impact sensor terminal B



* Right rear side impact sensor terminal B



* Left rear side impact sensor terminal B



锟斤拷 If greater than the specified range, test the circuit for a short to voltage.



4. Ignition ON, test for less than 1 volt between the low reference circuit and ground.



* Right front end sensor terminal 2



* Left front end sensor terminal 2



* Right front side impact sensor terminal A



* Left front side impact sensor terminal A



* Right rear side impact sensor terminal A



* Left rear side impact sensor terminal A



锟斤拷 If greater than the specified range, test the circuit for a short to voltage.



5. Test for infinite resistance between the signal circuit and ground.



* Right front end sensor terminal 1



* Left front end sensor terminal 1



* Right front side impact sensor terminal B



* Left front side impact sensor terminal B



* Right rear side impact sensor terminal B

Wednesday, June 26, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 18


DTC B0023 04



- Right Roof Rail Air Bag Deployment Loop Open Circuit



DTC B0023 0D



- Right Roof Rail Air Bag Deployment Loop Resistance Above Threshold



DTC B0023 0E



- Right Roof Rail Air Bag Deployment Loop Resistance Below Threshold



Diagnostic Fault Information



Circuit/System Description



During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the



deployment loop in order to deploy the air bag module. There are 2 shorting bars used within the module connector which will short together both



high and low circuits, when the connector is disconnected. This will prevent unwanted deployment of the inflator module during servicing.



Conditions for Running the DTC



Ignition voltage is between 9-16 V.



Conditions for Setting the DTC



B0014 01, B0015 01, B0016 01, B0019 01, B0020 01, B0021 01, B0022 01, B0023 01



The air bag or seat belt retractor pretensioner high and/or low control circuit is shorted to voltage for 120 milliseconds.



B0014 02, B0015 02, B0016 02, B0019 02, B0020 02, B0021 02, B0022 02, B0023 02



The air bag or seat belt retractor pretensioner high and/or low control circuit is shorted to ground for 120 milliseconds.



B0014 04, B0015 04, B0016 04, B0019 04, B0020 04, B0021 04, B0022 04, B0023 04



The air bag or seat belt retractor pretensioner high and/or low control circuit is open for 120 milliseconds.



B0014 0D, B0015 0D, B0016 0D, B0019 0D, B0020 0D, B0021 0D, B0022 0D, B0023 0D



The air bag or seat belt retractor pretensioner deployment loop resistance is greater than 3.9 ohms for 120 milliseconds.



B0014 0E, B0015 0E, B0016 0E, B0019 0E, B0020 0E, B0021 0E, B0022 0E, B0023 0E

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 625


Reference Information



Schematic Reference



* Immobilizer Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Diagrams/Electrical Diagrams/Immobilizer



Schematics)



* Remote Function Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Keyless Entry/Keyless Entry



Transmitter/Diagrams/Electrical Diagrams)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



Keyless Entry System Description and Operation (Without Accessory 2 Way Remote) (See: Accessories and Optional Equipment/Antitheft and



Alarm Systems/Keyless Entry/Description and Operation/Keyless Entry System Description and Operation (Without Accessory 2 Way Remote)



)Keyless Entry System Description and Operation (With Accessory 2 Way Remote) (See: Accessories and Optional Equipment/Antitheft and



Alarm Systems/Keyless Entry/Description and Operation/Keyless Entry System Description and Operation (With Accessory 2 Way Remote))



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



Ignition ON, observe the scan tool BCM Hood Open Switch and Hood Closed Switch parameters. With the hood open, the Hood Open Switch



parameter should read Active and the Hood Closed Switch parameter should read Inactive. With the hood closed, the Hood Open Switch parameter



should read Inactive and the Hood Closed Switch parameter should read Active.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the hood ajar switch.



2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal C and ground.



锟斤拷 If greater than the specified range, test the ground circuit for an open/high resistance.



3. Ignition ON, test for 11.5-12.0 volts between the signal circuit terminal A and ground.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



BCM.



4. Ignition ON, test for 11.5-12.0 volts between the signal circuit terminal B and ground.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



BCM.



5. If all circuits test normal, test or replace the hood ajar switch.



Component Testing



Hood Ajar Switch



1. Ignition OFF, disconnect the harness connector at the hood ajar switch.



2. With the switch in the hood closed position, test for infinite resistance between the ground terminal C and the signal terminal A.



锟斤拷 If not infinite, replace the hood ajar switch.



3. Test for less than 2.0 ohms between the ground terminal C and the signal terminal B.

Tuesday, June 25, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 222

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 598


* Refer to the appropriate replacement procedure for the component causing the condition.



* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming



B2645



DTC B2645



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B2645 03



- Ambient Light Sensor Circuit Voltage Below Threshold



DTC B2645 07



- Ambient Light Sensor Circuit Voltage Above Threshold



Diagnostic Fault Information



Circuit/System Description



The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary depending



on outside lighting conditions. The body control module (BCM) provides a 5 V reference signal to the ambient light sensor. The BCM monitors the



ambient light sensor signal circuit to determine if outside lighting conditions are correct for either daytime running lights (DRL) or automatic lamp



control (ALC) when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the DRLs ON. In low light



conditions, when the headlamps switch is in AUTO position, the BCM will command the low beam headlamps ON.



Conditions for Running the DTC



Battery voltage must be between 9-16 V.



Conditions for Setting the DTC



B2645 03



The BCM detects voltage is below 0.196 volt in the ambient light sensor signal circuit.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 544


1. Ignition OFF, disconnect the cellular antenna coax from the CIM module and the cellular antenna.



2. Ignition ON, test for less than 1 volt between the antenna coax center terminal and ground.



锟斤拷 If greater than the specified range, replace the antenna coax.



3. Ignition ON, test for less than 1 volt between the antenna coax outer shield and ground.



锟斤拷 If greater than the specified range, replace the antenna coax.



4. Test for infinite resistance between the antenna coax center terminal and ground.



锟斤拷 If less than the specified value, replace the antenna coax



5. Test for infinite resistance between the antenna coax outer shield and ground.



锟斤拷 If less than the specified value, replace the antenna coax



6. Test for less than 5 ohms at the cellular antenna coax center terminal from end to end.



锟斤拷 If greater than specified value, replace the cellular antenna coax cable.



7. Test for less than 5 ohms at the cellular antenna coax outer shield from end to end.



锟斤拷 If greater than specified value, replace the cellular antenna coax cable.



8. Test for infinite resistance between the antenna coax center terminal and the outer shield.



锟斤拷 If less than specified value, replace the cellular antenna coax cable.



9. If coax cable tests normal, replace the cellular antenna.



10. Clear the DTCs and operate the vehicle within the conditions for running the DTC. Verify DTC B2470 does not set.



锟斤拷 If the DTC sets, replace the CIM.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Cellular Communications/Digital Radio Antenna Replacement (See: Accessories and Optional Equipment/Antenna/Antenna, Radio/Service



and Repair/Cellular Communications/Digital Radio Antenna Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for CIM replacement, setup, and programming



B2474



DTC B2474



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptor



DTC B2474 07



- Navigation Display Head Backlighting Performance



Circuit Description



The internal backlighting of the navigation display screen located in the navigation radio.



Conditions for Running the DTC



* Radio ON.



* Battery voltage must be between 9-16 volts.

Monday, June 24, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 282


Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



1. Verify that DTC B1405 is not set.



锟斤拷 If DTC is set, refer to DTC B1405 (See: B1405).



2. Verify that DTC B0958 3A, DTC B0959 3A, DTC B0960 3A, or DTC B0961 3A is not set.



锟斤拷 If DTC is set, replace the appropriate object alarm sensor.



3. Transmission in REVERSE, verify the parking assist system is enabled and one audible beep sounds.



Circuit/System Testing



Single Object Alarm Sensor DTC Set



1. Ignition OFF, disconnect the harness connector at the appropriate object alarm sensor.



2. Ignition OFF for 30 seconds, test for less than 20 Ohms between the low reference circuit terminal 2 and ground.



锟斤拷 If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the object



alarm module.



3. Ignition ON, transmission in REVERSE, test for 8.0-9.0 V between the voltage reference circuit terminal 1 and ground.



锟斤拷 If greater than the specified range, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the object



alarm module.



锟斤拷 If less than the specified range, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,



replace the object alarm module.



4. Ignition OFF, remove the malfunctioning object alarm sensor and swap locations with another properly functioning object alarm sensor.



Connect the harness connector at both sensors.



5. Ignition ON, verify the DTC is set for the new location in which the malfunctioning object alarm sensor is installed.



锟斤拷 If the DTC does not set for the new location, test the signal circuit terminal 3 for a short to voltage, short to ground, or an open/high



resistance. If the circuit tests normal, replace the object alarm module.



6. If the DTC sets for the new location in which the malfunctioning object alarm sensor is installed, replace the appropriate object alarm sensor.



Multiple Object Alarm Sensor DTCs Set



1. Ignition OFF, disconnect the harness connector at each of the object alarm sensors.



2. Ignition OFF for 30 seconds, test for less than 20 Ohms between the low reference circuit terminal 2 and ground.



锟斤拷 If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the object



alarm module.



3. Ignition ON, transmission in REVERSE, test for 8.0-9.0 V between the voltage reference circuit terminal 1 and ground.



锟斤拷 If greater than the specified range, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the object



alarm module.



锟斤拷 If less than the specified range, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,



replace the object alarm module.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Rear Object Sensor Replacement (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Parking Assist



Distance Sensor/Service and Repair/Rear Object Sensor Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for object alarm module replacement, setup, and



programming



B0961



DTC B0958, B0959, B0960, or B0961



Diagnostic Instructions

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 504


3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 6 and ground.



锟斤拷 If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,



replace the MSM.



锟斤拷 If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.



4. Verify the appropriate scan tool driver seat sensor parameter is less than 1 volt.



锟斤拷 If greater than the specified range, test the appropriate signal circuit listed below for a short to voltage. If the circuit tests normal, replace



the MSM.



* Seat front vertical position sensor terminal 1



* Seat rear vertical position sensor terminal 5



* Seat horizontal position sensor terminal 3



5. Install a 3A fused jumper wire between the appropriate signal circuit listed below and the 5-volt reference circuit terminal 6. Verify the



appropriate scan tool driver seat position sensor parameter is greater than 4.75 volts.



* Seat horizontal position sensor terminal 3



* Seat front vertical position sensor terminal 1



* Seat rear vertical position sensor terminal 5



锟斤拷 If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the



MSM.



6. If all circuits test normal, test or replace the seat position sensor.



B1850 01, B1850 06, B1860 01 or B1860 06



1. Ignition OFF, disconnect the X2 harness connector at the lumbar adjuster assembly.



2. Test for less than 2 ohms between the low reference circuit terminal C and ground.



锟斤拷 If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.



3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.



锟斤拷 If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,



replace the MSM.



锟斤拷 If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.



4. Verify the appropriate scan tool lumbar sensor parameter is less than 1 volt.



锟斤拷 If greater than the specified range, test the appropriate signal circuit listed below for a short to voltage. If the circuit tests normal, replace



the MSM.



* Lumbar vertical position sensor terminal B



* Lumbar horizontal position sensor terminal D



5. Install a 3A fused jumper wire between the appropriate signal circuit listed below and the 5-volt reference circuit terminal A. Verify the



appropriate scan tool lumbar sensor parameter is greater than 4.75 volts.



* Lumbar vertical position sensor terminal B



* Lumbar horizontal position sensor terminal D



锟斤拷 If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the



MSM.



6. If all circuits test normal, test or replace the lumbar position sensor.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Front Seat Adjuster Replacement (with HP2) ()Front Seat Adjuster Replacement (without HP2) ()



* Seat Lumbar Sub System Replacement ()



* Front Seat Recliner Actuator Motor Replacement ()



* Control Module References (See: Testing and Inspection/Programming and Relearning) for MSM replacement, setup, and programming

Sunday, June 23, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 692


B3823



DTC B3819, B3820, B3822, or B3823



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B3819 00



- Left Rear Window Up Control Circuit



DTC B3820 00



- Left Rear Window Down Control Circuit



DTC B3822 00



- Right Rear Window Up Control Circuit



DTC B3823 00



- Right Rear Window Down Control Circuit



Diagnostic Fault Information



Circuit/System Description



The body control module (BCM) monitors the window UP/DOWN command from the driver door switch (DDS). When the rear window UP or



DOWN command is received, the BCM sends a signal to the appropriate rear window switch. The rear window switches continuously monitor the



up and down signal circuits, if no function is being commanded, the signal voltage is at approximately B+ voltage. If the UP or DOWN function is



commanded, the BCM signal voltage drops approximately 0.5 volts and the appropriate rear window switch will then command the window in the



UP or DOWN direction.



Conditions for Running the DTC

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 535


2. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 3 X5 and the low reference circuit terminal 5 X2.



锟斤拷 If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat



back heater element/temperature sensor.



锟斤拷 If greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits



test normal, replace the seat back heater element/temperature sensor.



3. Connect the X2, X5 harness connectors at the MSM.



4. Disconnect the harness connector at the seat back heater element/temperature sensor.



5. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



MSM.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the MSM.



6. If all circuits test normal, replace the MSM.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Driver or Passenger Seat Back Cushion Heater Replacement (Escalade with HP2) ()Driver or Passenger Seat Back Cushion Heater



Replacement (Tahoe with HP2) ()Driver or Passenger Seat Back Cushion Heater Replacement (without HP2) ()



* Control Module References (See: Testing and Inspection/Programming and Relearning) for the MSM replacement, setup, and programming



HP2 or Dealer Installed W/O Memory



DTC B2435 or B2440 (HP2 or Dealer Installed w/o Memory)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B2435 02



- Left Seat Back Heater Sensor Circuit Short to Ground



DTC B2435 05



- Left Seat Back Heater Sensor Circuit Short to Battery or Open



DTC B2440 02



- Right Seat Back Heater Sensor Circuit Short to Ground



DTC B2440 05



- Right Seat Back Heater Sensor Circuit Short to Battery or Open



Diagnostic Fault Information

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 632


DTC B3109 00



- Keyless Entry Transmitter 1 Low Battery



DTC B3110 00



- Keyless Entry Transmitter 2 Low Battery



DTC B3111 00



- Keyless Entry Transmitter 3 Low Battery



DTC B3112 00



- Keyless Entry Transmitter 4 Low Battery



Circuit/System Description



With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the remote control



door lock receiver (RCDLR) along with the commanded keyless entry function.



Conditions for Running the DTC



A keyless transmitter button is pressed.



Conditions for Setting the DTC



The DTC sets after 3 consecutive low battery signals from the same programmed transmitter.



Action Taken When the DTC Sets



The keyless entry system is inoperative.



Conditions for Clearing the DTC



The DTC is cleared when a normal transmitter voltage signal is received from the programmed transmitter that set the DTC.



Diagnostic Aids



The keyless entry transmitter used in the 2-Way Advanced Remote Start System is unique to the system. When servicing or replacing a transmitter,



ensure that the correct transmitter is used. The correct transmitter part number can be found in the Accessory section of the parts catalog. Attempting



to replace a 2-Way Advanced Remote Start transmitter with a regular service part may result in a failure to program the transmitter.



Reference Information



Schematic Reference



Remote Function Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Keyless Entry/Keyless Entry



Transmitter/Diagrams/Electrical Diagrams)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



Keyless Entry System Description and Operation (Without Accessory 2 Way Remote) (See: Accessories and Optional Equipment/Antitheft and



Alarm Systems/Keyless Entry/Description and Operation/Keyless Entry System Description and Operation (Without Accessory 2 Way Remote)



)Keyless Entry System Description and Operation (With Accessory 2 Way Remote) (See: Accessories and Optional Equipment/Antitheft and



Alarm Systems/Keyless Entry/Description and Operation/Keyless Entry System Description and Operation (With Accessory 2 Way Remote))



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification

Saturday, June 22, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 197


Conditions for Running the DTC



Ignition ON.



Conditions for Setting the DTC



The HVAC control module detects the temperature sensor signal circuit is less than -36锟斤拷C (-38锟斤拷F) or greater than 215锟斤拷C (419锟斤拷F) for greater than 15



seconds.



Action Taken When the DTC Sets



The system operates using a default value.



Conditions for Clearing the DTC



* The DTC will become history if the HVAC control module no longer detects the condition that set the DTC.



* The history DTC will clear after 100 fault-free ignition cycles.



Reference Information



Schematic Reference



HVAC Schematics (See: Heating and Air Conditioning/Diagrams/Electrical Diagrams/HVAC - Automatic)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



* Air Temperature Description and Operation (See: Heating and Air Conditioning/Description and Operation/HVAC - Automatic/Air



Temperature Description and Operation)



* Air Delivery Description and Operation (See: Heating and Air Conditioning/Description and Operation/HVAC - Automatic/Air Delivery



Description and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



1. Measure actual outside air temperature using a thermometer. Compare this value to the scan tool Outside Air Temp. Raw parameter. The



measured temperature should be within 5 degrees of parameter.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 7


The serial data gateway module has not received a valid state of health message from the high voltage circuit impact detector sensor for 2.5 seconds.



B009F 3A



The wrong high voltage circuit impact detector sensor has been installed.



B009F 4A



The serial data gateway module calibration does not match the vehicle configuration.



B009F 73



The serial data gateway module has received invalid serial data from the high voltage circuit impact detector sensor.



Action Taken When the DTC Sets



The driver information center (DIC) displays the SERVICE HYBRID SYSTEM message.



Conditions for Clearing the DTC



* A current DTC clears when the malfunction is no longer present.



* The DIC message turns OFF when the DTC passes.



* A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.



Diagnostic Aids



* The high voltage circuit impact detector sensor has many different internal configurations in the same external package. Ensure that the correct



sensor part number is installed with the correct software programmed in the serial data gateway module.



* Turn the ignition OFF for 1 minute before using a scan tool to clear the DTC from the serial data gateway module. If the ignition is not OFF



for 1 minute, the DTC may not clear.



Reference Information



Schematic Reference



Data Communication Schematics (See: Powertrain Management/Computers and Control Systems/Information Bus/Diagrams/Electrical Diagrams)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



Drive Motor Generator Control Module Description and Operation ()



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



1. Verify that DTC B009F 00, B009F 4A, or B009F 73 is not set.



锟斤拷 If the DTC is set, program the serial data gateway module. If the DTC resets, replace the serial data gateway module.



2. Verify the serial data gateway module is programmed with the correct software calibration.



锟斤拷 If the correct software is not installed, program the serial data gateway module.



3. Ignition ON, observe the scan tool Hybrid Crash Sensor 1 parameter. The reading should be No Crash.



锟斤拷 If not No Crash, refer to Circuit/System Testing.

Friday, June 21, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 557


Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the liftgate latch assembly.



2. Test for less than 5 ohms between the control circuit terminal 1 and ground.



锟斤拷 If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace



the LGM.



3. Test for less than 5 ohms between the control circuit terminal 3 and ground.



锟斤拷 If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace



the LGM.



4. Connect a test lamp between control circuit terminal 1 and ground.



5. Ignition ON, command the liftgate to OPEN by pressing and releasing the liftgate interior switch. The test lamp should illuminate while



commanding the OPEN state.



锟斤拷 If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace



the LGM.



锟斤拷 If the test lamp is always ON, test the control circuit for a short to voltage, if the circuit tests normal, replace the LGM.



6. Ignition OFF, connect a test lamp between the control circuit terminal 3 and ground.



7. Connect a 3A fused jumper wire between the signal circuit terminal 6 and ground.



8. Ignition ON, command the liftgate to CLOSE by pressing and releasing the liftgate interior switch. The test lamp should illuminate while



commanding the CLOSE state.



锟斤拷 If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace



the LGM.



锟斤拷 If the test lamp is always ON, test the control circuit for a short to voltage, if the circuit tests normal, replace the LGM.



9. If all circuits test normal, test or replace the liftgate latch assembly.



Component Testing



1. Install a 20A fused jumper wire between the control terminal 1 and 12 volts. Momentarily install a jumper wire between the control terminal 3



and ground. The liftgate latch assembly should perform the CINCH or RELEASE function.



锟斤拷 If the function does not perform as specified, replace the liftgate latch assembly.



2. Reverse the jumper wires; the liftgate latch assembly should perform the RELEASE or CINCH function.



锟斤拷 If the function does not perform as specified, replace the liftgate latch assembly.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



Control Module References (See: Testing and Inspection/Programming and Relearning) for LGM replacement, setup and programming



W/O HP2 With Memory



DTC B2508 or B2509 (w/o HP2 with Memory)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B2508 01



- Seat Heater Relay Circuit Short to Battery



DTC B2508 02



- Seat Heater Relay Circuit Short to Ground

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 104


鈬揑f infinite resistance



4.3Test for less than 2 锟?in the 10 V reference circuits end to end.



-If 2 锟?or greater, repair the open/high resistance in the circuit.



-If less than 2 锟?replace the Assist Step Control Module.



-



If greater than 11 V



4.1Ignition OFF, disconnect the X2 harness connector at the Assist Step Control Module control module, ignition ON.



4.2Test for less than 1 V between the following 10 V reference circuit and ground.



-X2 Terminal A Running Board - Left



-X2 Terminal B Running Board - Right



-If 1 V or greater, repair the short to voltage on the appropriate circuit.



-If less than 1 V, replace the Assist Step Control Module.



锟?If between 9-11 V



5.Ignition OFF. Connect Running Board - Left actuator. Ignition ON.



6.Test for 9 - 11 V between the 10 V reference circuit terminal D at the right side and ground while commanding the actuator with the scan



tool.



-



If not between 9-11 V



Test or replace Running Board - Left actuator.



锟?If between 9-11 V



7.Ignition OFF. Disconnect Running Board - Left, connect Running Board - Right. Ignition ON.



8.Test for 9 - 11 V between the 10 V reference circuit terminal D at the left side and ground while commanding the actuator with the scan tool.



-



If not between 9-11 V



Test or replace Running Board - Right actuator.



锟?If between 9-11 V



9.Test for greater than 9 V between the appropriate signal circuit terminal E and ground while commanding the actuator with the scan tool.



-



If not greater than 9 V



9.1Ignition OFF, disconnect the X2 harness connector at the Assist Step Control Module.



9.2Test for infinite resistance between the following signal circuit terminals and ground.



-X2 Terminal C Running Board - Left



-X2 Terminal D Running Board - Right



-If less than infinite resistance, repair the short to ground on the appropriate circuit.



鈬揑f infinite resistance



9.3Test for less than 2 锟?in the signal circuits end to end.



-If 2 锟?or greater, repair the open/high resistance in the circuit.



-If less than 2 锟?replace the Assist Step Control Module.



-



If 9 V or greater



10.Connect a test lamp between the control circuit terminal A and the control circuit terminal B.



11.Verify the test lamp turns on and off while commanding the appropriate board to Extend and Retract with a scan tool.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 382


Circuit/System Description



The memory seat module (MSM) supplies a 5-volt reference voltage to the driver seat, adjustable pedal, and the tilt steering wheel position sensors.



The MSM monitors this reference voltage to ensure the accuracy of the voltages being returned from the sensors. If the voltage exceeds the normal



operating range, errors will occur in the memory recall operations of the seat, adjustable pedals, and steering wheel.



Conditions for Running the DTC



The memory seat module must be powered.



Conditions for Setting the DTC



The following conditions exist for more than 1 second:



B1395 02



The reference voltage drops below 4.8 volts for more than 300 mS.



B1395 05



The reference voltage exceeds 5.2 V for more than 300 mS.



Action Taken When the DTC Sets



All memory recall functions will be disabled.



Conditions for Clearing the DTC



* The current DTC will clear 3 seconds after the reference voltage returns to normal operating range, and the ignition is cycled OFF then back to



ACC or RUN.



* A history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.



Diagnostic Aids



An internal short to ground in one of the position sensors may set this DTC.

Thursday, June 20, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 82


DTC B0020 0D



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Resistance Above Threshold



DTC B0020 0E



- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Resistance Below Threshold



DTC B0021 01



- Passenger Side Seat Air Bag Deployment Loop Short to Battery



DTC B0021 02



- Passenger Side Seat Air Bag Deployment Loop Short to Ground



DTC B0021 04



- Passenger Side Seat Air Bag Deployment Loop Open Circuit



DTC B0021 0D



- Passenger Side Seat Air Bag Deployment Loop Resistance Above Threshold



DTC B0021 0E



- Passenger Side Seat Air Bag Deployment Loop Resistance Below Threshold



DTC B0022 01



- RF Pretensioner Deployment Loop Short to Battery



DTC B0022 02



- Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Ground



DTC B0022 04



- Passenger Seat Belt Retractor Pretensioner Deployment Loop Open Circuit



DTC B0022 0D



- Passenger Seat Belt Retractor Pretensioner Deployment Loop Resistance Above Threshold



DTC B0022 0E



- Passenger Seat Belt Retractor Pretensioner Deployment Loop Resistance Below Threshold



DTC B0023 01



- Right Roof Rail Air Bag Deployment Loop Short to Battery



DTC B0023 02



- Right Roof Rail Air Bag Deployment Loop Short to Ground



DTC B0023 04



- Right Roof Rail Air Bag Deployment Loop Open Circuit



DTC B0023 0D



- Right Roof Rail Air Bag Deployment Loop Resistance Above Threshold



DTC B0023 0E



- Right Roof Rail Air Bag Deployment Loop Resistance Below Threshold



Diagnostic Fault Information

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 374


锟斤拷 If less than specified, repair the signal circuit for a short to ground.



8. If all circuits test normal, replace the BCM.



Component Testing



Ignition Switch



1. Ignition OFF, disconnect the harness connector at the ignition switch.



2. Using the Resistance Test table below, check the resistance between the terminals of the ignition switch listed in each switch position.



If any reading is not as specified, replace the ignition switch.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.



* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming



* Ignition and Start Switch Replacement (See: Powertrain Management/Ignition System/Sensors and Switches - Ignition System/Ignition



Switch/Service and Repair)



SDGM with HP2



DTC B1380 (SDGM with HP2)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B1380 01



- Device Ignition ACCESSORY Circuit Short to Battery



DTC B1380 06



- Device Ignition ACCESSORY Circuit Short to Ground or Open



Diagnostic Fault Information



Circuit/System Description



Modules connected to the high and low speed GMLAN serial data circuits monitor for serial data communications during normal vehicle operation.



Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are



needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used



by the receiver module as an availability indication of the transmitter module. Each message contains the identification number of the transmitter



module.



The wake up signal circuit is energized by the body control module (BCM) activate specific modules when the ignition key is in ACC, ON or



START. If the serial data gateway module does not receive this signal when the ignition switch is ON DTC B1380 will set in the SDGM along with

Wednesday, June 19, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 120


Action Taken When the DTC Sets



* The SDM defaults the seat position sensor to seat forward threshold.



* The SDM requests the instrument panel cluster to illuminate the AIR BAG indicator.



Conditions for Clearing the DTC



* The condition for setting the DTC no longer present.



* A history DTC will clear once 100 fault-free ignition cycles have occurred.



Reference Information



Schematic Reference



SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/Description and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information



Circuit/System Verification



1. Verify that DTC B0079 08 or B0080 08 is not set.



锟斤拷 If the DTC is set with the symptom byte 08, replace the appropriate B88 seat position sensor.



2. Ignition ON, observe the scan tool seat position sensor parameter. The reading should be between 2-20 m A. With the scan tool verify that the



seat position sensor parameter is between 2-20 m A.



锟斤拷 If not within the specified range, refer to Circuit/System Testing.



3. With the seat un-weighted, observe the scan tool while moving the seat to the full forward and then full rearward positions. The seat position



sensor parameter should be continuously between 2-20 m A.



锟斤拷 If not within the specified range, refer to Circuit/System Testing.



4. While sitting in the seat, observe the scan tool while moving the seat to the full forward and then full rearward positions. The seat position



sensor parameter should be continuously between 2-20 m A.



锟斤拷 If not within the specified range, refer to Circuit/System Testing.



Circuit/System Testing



Note: When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the



affected component/connector:



* Seat position sensor



* SDM module



* Seat position sensor wiring harness connector



* SDM wiring harness connector



1. Ignition OFF, disconnect the harness connector at the appropriate B88 seat position sensor.



2. Test for less than 10 ohm between the low reference circuit terminal 1 and ground.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 25


Circuit/System Description



During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the



deployment loop in order to deploy the air bag module. There are 2 shorting bars used within the module connector which will short together both



high and low circuits, when the connector is disconnected. This will prevent unwanted deployment of the inflator module during servicing.



Conditions for Running the DTC



Ignition voltage is between 9-16 V.



Conditions for Setting the DTC



B0014 01, B0015 01, B0016 01, B0019 01, B0020 01, B0021 01, B0022 01, B0023 01



The air bag or seat belt retractor pretensioner high and/or low control circuit is shorted to voltage for 120 milliseconds.



B0014 02, B0015 02, B0016 02, B0019 02, B0020 02, B0021 02, B0022 02, B0023 02



The air bag or seat belt retractor pretensioner high and/or low control circuit is shorted to ground for 120 milliseconds.



B0014 04, B0015 04, B0016 04, B0019 04, B0020 04, B0021 04, B0022 04, B0023 04



The air bag or seat belt retractor pretensioner high and/or low control circuit is open for 120 milliseconds.



B0014 0D, B0015 0D, B0016 0D, B0019 0D, B0020 0D, B0021 0D, B0022 0D, B0023 0D



The air bag or seat belt retractor pretensioner deployment loop resistance is greater than 3.9 ohms for 120 milliseconds.



B0014 0E, B0015 0E, B0016 0E, B0019 0E, B0020 0E, B0021 0E, B0022 0E, B0023 0E



The air bag or seat belt retractor pretensioner deployment loop resistance is less than 1.1 ohm for 120 milliseconds.



Action Taken When the DTC Sets



* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.



* The SDM will store a DTC, however if an event occurs the system will still attempt deployments.



Conditions for Clearing the DTC



* The condition for setting the DTC no longer exists.



* A history DTC will clear once 100 fault-free ignition cycles have occurred.



Diagnostic Aids



* When a harness connector is disconnected, the high control and low control circuits are shorted together by the integral shorting bar. This



should be taken into account when testing for faults on these circuits.



* This DTC usually indicates a poor connection or a wiring malfunction between the SDM and the deployment loop.



Reference Information



Schematic Reference



SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/Description and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 512


Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat



unoccupied, then with the seat occupied.



2. Test for 2.0 - 8.0 Ohms between control circuit terminal 6 and control circuit terminal 2.



锟斤拷 If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heater



element.



锟斤拷 If greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat cushion



heater element.



3. Disconnect the X2, X4 harness connectors at the HSM.



4. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 20 X4 and the low reference circuit terminal 8 X2.



锟斤拷 If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat



cushion heater element/temperature sensor.



锟斤拷 If greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits



test normal, replace the seat cushion heater element/temperature sensor.



5. Connect the X1, X2, X4 harness connectors at the HSM.



6. Disconnect the harness connector at the seat cushion heater element/temperature sensor.



7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



HSM.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.



8. If all circuits test normal, replace the HSM.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Driver or Passenger Seat Cushion Heater Replacement (without HP2) ()Driver or Passenger Seat Cushion Heater Replacement (with HP2)



()



* Control Module References (See: Testing and Inspection/Programming and Relearning) for the HSM replacement, setup, and programming



Rear Seat



DTC B2425 or B2430 (Rear Seat)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B2425 04



- Left Seat Heater Cushion Circuit Open



DTC B2425 0A



- Left Seat Heater Cushion Circuit Rate of Change Below Threshold



DTC B2425 0B



- Left Seat Heater Cushion Circuit Current Above Threshold



DTC B2425 0C



- Left Seat Heater Cushion Circuit Current Below Threshold



DTC B2425 0D



- Left Seat Heater Cushion Circuit Resistance Above Threshold



DTC B2425 0E



- Left Seat Heater Cushion Circuit Resistance Below Threshold

Tuesday, June 18, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 321


Circuit/System Testing



Important: This DTC can be set by either the radio or the amplifier. If the DTC was set by the radio, diagnose the appropriate audio output



circuits to the speakers or the low level inputs to the amplifier (if equipped). If the DTC was set by the amplifier, diagnose audio output



signals to the speakers from the amplifier. If equipped with rear seat audio (RSA) (U42), the RSA must be turned off to perform proper



speaker testing.



Without Amplifier



1. Ignition OFF, disconnect the harness connector at the appropriate speaker.



2. Radio ON, test for 5.0-7.5 volts between the signal circuit terminal A and ground.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



radio.



3. Test for 5.0-7.5 volts between the signal circuit terminal B and ground.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



radio.



4. If all circuits test normal, replace the speaker.



DTC Set By The Radio UQA



1. Ignition OFF, disconnect the X3 harness connector at the amplifier.



2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.



* Left front low level audio signal (+) - terminal 15



* Left front low level audio signal (-) - terminal 7



* Right front low level audio signal (+) - terminal 14



* Right front low level audio signal (-) - terminal 6



* Left rear low level audio signal (+) - terminal 13



* Left rear low level audio signal (-) - terminal 5



* Right rear low level audio signal (+) - terminal 12



* Right rear low level audio signal (-) - terminal 4



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



radio.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.



3. If all circuits test normal, replace the amplifier.



DTC Set By Radio UQA with U42



1. Ignition OFF, disconnect the X3 harness connector at the amplifier.



2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.



* Left front low level audio signal (+) - terminal 15



* Left front low level audio signal (-) - terminal 7



* Right front low level audio signal (+) - terminal 14



* Right front low level audio signal (-) - terminal 6



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



radio.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.



3. Ignition OFF, reconnect the X3 harness connector at the amplifier.



4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.



5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.



* Left rear low level audio signal (+) - terminal 1



* Left rear low level audio signal (-) - terminal 2



* Right rear low level audio signal (+) - terminal 3



* Right rear low level audio signal (-) - terminal 4



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



rear seat audio (RSA) module.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)