2010 Cadillac CTS Sedan AWD V6-3.6L Page 218
The liftgate module detects a short to ground in a liftgate motor control circuit.
B396A 04
The liftgate module detects an open/high resistance in a liftgate motor control circuit.
Action Taken When the DTC Sets
The power liftgate will only function in the manual mode.
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.
Note: DTC B396A 01 may set as current or history when the liftgate module detects erratic voltage levels in the electrical system and does not
affect the operation of the power liftgate. If this DTC is set and the liftgate functions normally, clear the DTC.
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/Locks/Diagrams/Electrical Diagrams/Liftgate Schematics)
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/Liftgate
Description and Operation)
Electrical Information Reference
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, doors UNLOCKED, observe the function of the liftgate while pressing the S46 liftgate handle switch, the liftgate latch should release
the liftgate and the liftgate should power OPEN.
Circuit/System Testing
1. Ignition OFF, disconnect the X1 harness connector at the K39 liftgate module.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 3 and ground.
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance
3. Ignition OFF, connect the X1 harness connector at the K39 liftgate module and disconnect the harness connector at the M17 liftgate motor
assembly.
4. Test for less than 30k ohms between the control circuit terminal A and ground.
瀚慖f greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal,
replace the K39 liftgate module.
5. Test for less than 30k ohms between the control circuit terminal B and ground.
