Wednesday, August 7, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 618


* 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 Tilt Up Switch parameter and Tilt Down Switch parameter while cycling the switch between states.The reading



should be Inactive and change to Active when pushing the appropriate switch.



Circuit/System Testing



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



2. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal B 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.



3. Verify the scan tool tilt switch parameter is Inactive.



锟斤拷 If not the specified value, test the control circuit listed below for a short to voltage. If the circuit tests normal, replace the MSM.



* Tilt Up Switch terminal C



* Tilt Down Switch terminal A



4. Install a 3A fused jumper wire between the control circuits listed below and the B+ circuit terminal. Verify the scan tool tilt switch parameter



is Active.



* Tilt Up Switch terminal C



* Tilt Down Switch terminal A



锟斤拷 If not the specified value, test the appropriate control circuit for a short to ground or an open/high resistance. If the circuit tests normal,



replace the MSM.



5. If all circuit test normal, test or replace the tilt switch.



Component Testing



Tilt Switch



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



2. Test for infinite resistance between the control terminals A and C with the switch in the neutral position.



锟斤拷 If less than the specified range, replace the tilt switch.



3. Test for less than 1 ohm between the control terminals listed below and the B+ terminal B with the switch in each appropriate position.



* Tilt Up Switch terminal C



* Tilt Down Switch terminal A



锟斤拷 If greater than the specified value, replace the tilt switch.



Repair Instructions



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



* Steering Column Tilt Wheel Switch Replacement (See: Sensors and Switches/Sensors and Switches - Steering and Suspension/Sensors and



Switches - Steering/Tilt Wheel Switch/Service and Repair)



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



B2875



DTC B2850, B2855, B2870, or B2875



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.

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