2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 559
* 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
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.
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/Connector End Views By Name)
Description and Operation
Rear Hatch/Gate Description and Operation (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Description and Operation/Rear
Hatch/Gate)
Electrical Information Reference
* 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)
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/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, observe the scan tool Trunk Lid/Liftglass Exterior Unlatch Switch parameter while pressing the exterior liftgate switch. The reading
should change between Active and Inactive.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the exterior liftgate switch.
2. Test for less than 1.0 ohm between the ground circuit terminal 2 and ground.
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool Trunk Lid/Liftglass Exterior Unlatch Switch parameter is Inactive.
瀚慖f not the specified parameter, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the BCM.
4. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 2. Verify the scan tool Trunk
Lid/Liftglass Exterior Unlatch Switch parameter is Active.
瀚慖f not the specified parameter, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the
BCM.
5. If all circuits test normal, test or replace the exterior liftgate switch.
Component Testing
1. Ignition OFF, disconnect the harness connector at the exterior liftgate switch.
2. Test for infinite resistance between the signal terminal 1 and the ground terminal 2 with the switch in the open position.
瀚慖f not the specified value, replace the exterior liftgate switch.
3. Test for less than 2.0 ohm between the signal terminal 1 and the ground terminal 2 with the switch in the closed position.
瀚慖f greater than the specified range, replace the exterior liftgate switch.
