2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 362
* Whenever the liftgate control module loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the
liftgate control 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/Connector End Views By Name)
Description and Operation
Liftgate Description and Operation (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Description and Operation/Liftgate)
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
1. Ignition ON, verify the scan tool Liftgate Mode Switch parameter changes from 125 counts to 350 counts to 245 counts while rotating the
S45B liftgate control switch - interior.
瀚慖f the value does not change with each position selected, refer to OFF/ 3/4 position/MAX Switch Circuit Test
2. Place the S45B liftgate control switch - interior to the OFF position.
3. Observe the scan tool Liftgate Front Control Switch parameter while pressing and releasing the liftgate button on the S45B liftgate control
switch-interior. The parameter should change between Inactive and Active.
瀚慖f the value does not change, refer to Open/Close Switch Circuit Test
Circuit/System Testing
OFF/ 3/4 position/MAX Switch Circuit Test
1. Ignition OFF, disconnect the harness connector at the S45B liftgate control switch-interior.
2. Test for less than 10 ohm between the ground circuit terminal 1 and ground.
瀚慖f greater than the specified range, test the ground circuit for a open/high resistance.
3. Ignition ON, verify the scan tool Liftgate Mode Switch parameter is greater than 300 counts.
瀚慖f less than the specified range, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the K39 liftgate
module.
4. Install a 3A fused jumper wire between the signal circuit terminal 3 and ground, verify the scan tool Liftgate Mode Switch parameter is less
than 5 counts.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,
replace the K39 liftgate module.
5. If all circuits test normal, test or replace the S45B liftgate control switch-interior.
Open/Close Switch Circuit Test
1. Ignition OFF, disconnect the harness connector at the S45B liftgate control switch-interior.
2. Test for less than 10 ohm between the ground circuit terminal 1 and ground.
瀚慖f greater than the specified range, test the ground circuit for a open/high resistance.
3. Ignition ON, verify the scan tool Liftgate Front Control Switch parameter is Inactive.
