Monday, June 10, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 175


command the liftgate to reverse direction.



Conditions for Running the DTC



The system voltage is 9-16 volts.



Conditions for Setting the DTC



B153F 02



The liftgate module detects a short to ground in the liftgate tape switch signal circuit.



B153F 03



The liftgate module detects less than 3.3 volts in the liftgate tape switch signal circuit.



B153F 05



The liftgate module detects a short to voltage or an open/high resistance in the liftgate tape switch signal circuit.



B153F 07



The liftgate module detects greater than 5.5 volts in the liftgate tape switch signal circuit.



Action Taken When the DTC Sets



The liftgate module will prevent any movement of the liftgate while attempting to command the liftgate to power close.



Conditions for Clearing the DTC



* The DTC will be current for as long as the fault is present.



* When the fault is no longer present, the DTC will be a history DTC.



* A history DTC will clear after 50 ignition cycles.



Diagnostic Aids



Important: Before testing can be performed the liftgate must be opened. Refer to Opening the Liftgate Without Electrical Power (See:



Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Service and Repair/Procedures) for the appropriate procedure.



Whenever the liftgate module loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the liftgate module.



Reference Information



Schematic Reference



Liftgate Schematics (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Liftgate Description and Operation (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/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. Ignition ON, observe the scan tool Object Detection Sensor Status parameter. The reading should be between 3V-3.5V.

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