Wednesday, July 17, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 447


Diagnostic Aids



* All position sensors use common ground and 5-volt reference circuits.



* If the 5-volt reference circuit is shorted to voltage, multiple codes will set.



* If the 5-volt reference circuit is shorted to ground, multiple codes will set.



* If the sensor ground circuit is open, multiple codes will set.



Reference Information



Schematic Reference



Driver Seat Schematics ()



Connector End View Reference



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



Description and Operation



Memory Seats 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



Ignition ON, observe the scan tool Driver Position Module driver seat and lumbar position sensor parameters. The readings should be between



0.22-2.75 volts and change while adjusting seat and lumbar positions.



Circuit/System Testing



B1825 01 or B1825 06



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



2. Test for less than 2 ohms between the low reference circuit terminal 1 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 MSM.



3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 3 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 scan tool Driver Seat Recline Sensor parameter is less than 1 volt.



锟斤拷 If greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the MSM.



5. Install a 3A fused jumper wire between the signal circuit terminal 2 and the 5-volt reference circuit terminal 3. Verify the scan tool Driver Seat



Recline Sensor parameter is greater than 4.75 volts.



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 recline position sensor.



B2355 01, B2355 06, B2365 01, B2365 06, B2375 01 or B2375 06



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



2. Test for less than 2 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 MSM.

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