2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 299
Circuit/System Description
The liftgate module supplies power and ground to the liftgate clutch, which is part of the liftgate motor assembly. Upon receiving a liftgate open
request, the liftgate module supplies voltage to the clutch via the liftgate motor engage control circuit. The liftgate motor disengage control circuit
supplies a ground. With the clutch energized, the motor output is mechanically connected to the liftgate and power liftgate operation is allowed.
The liftgate motor clutch engages or disengages the liftgate motor to the liftgate drive gear and is the component that determines power or manual
operation.
Conditions for Running the DTC
The system voltage is 9-16 volts.
Conditions for Setting the DTC
B396B 01
The liftgate module detects a short to voltage in the liftgate clutch engage control circuit or the liftgate clutch disengage control circuit.
B396B 02
The liftgate module detects a short to ground in the liftgate clutch engage control circuit or the liftgate clutch disengage control circuit.
B396B 04
The liftgate module detects an open/high resistance in the liftgate clutch engage control circuit or the liftgate clutch disengage control circuit.
Action Taken When the DTC Sets
* When an open or short to ground condition exists, power liftgate operation will be inoperative.
* When a short to voltage condition exists, the liftgate can not be opened or closed manually.
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
Note: 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)
