Tuesday, October 15, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 645


* 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, command the liftglass latch to release the liftglass by pressing the liftgate window release switch. The liftglass latch should release the



liftglass.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the rear window wiper motor.



2. Ignition ON, connect a test lamp between the signal circuit terminal B and ground.



3. Command the liftglass latch to release by pressing the liftgate window release switch. The test lamp should briefly illuminate when the liftgate



window release switch is pressed.



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



BCM.



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



4. If all circuits test normal, replace the rear window wiper motor.



Repair Instructions



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



* Rear Window Wiper Motor Replacement (See: Wiper and Washer Systems/Wiper Motor/Service and Repair/Rear Window Wiper Motor



Replacement)



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



B3445



DTC B3445



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 B3445 00



- Stop Lamp Circuit



Diagnostic Fault Information