2010 Cadillac Truck SRX AWD V6-3.0L Page 365
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.
瀚慖f not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K39 liftgate control
module.
4. Install a 3 A fused jumper wire between the signal circuit terminal 4 and ground. Verify the scan tool Liftgate Front Control Switch
parameter is Active.
瀚慖f not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the
K39 liftgate control module.
5. If all circuits test normal, test or replace the S45B liftgate control switch-interior.
