2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 230
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. With the liftgate closed, observe the scan tool Liftgate Latch Pawl, Ratchet, and Sector Switch parameters. Each parameter status should be
as listed below:
* Liftgate Latch Pawl Switch parameter - Closed
* Liftgate Latch Ratchet Switch parameter - Closed
* Liftgate Latch Sector Switch parameter - Inactive
2. With the liftgate open, observe the scan tool Liftgate Latch Pawl, Ratchet, and Sector Switch parameters. Each parameter status should be as
listed below:
* Liftgate Latch Pawl Switch parameter - Open
* Liftgate Latch Ratchet Switch parameter - Open
* Liftgate Latch Sector Switch parameter - Inactive
3. Sector Switch Test - Close the liftgate allowing the cinch motor to pull the liftgate closed. Observing the scan tool Liftgate Latch Sector
Switch parameter while the liftgate is being automatically cinched closed; the parameter should change from Inactive to Active then back to
Inactive within 10 seconds.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the A23C liftgate latch assembly.
2. Test for less than 30 ohm between the low reference circuit terminal 2 and ground.
瀚慖f greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests
normal, replace the K39 liftgate control module.
3. Ignition ON, verify the scan tool Liftgate Latch Pawl Switch parameter is Closed.
瀚慖f not the specified value, test the signal circuit terminal 5 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 5 and the low reference circuit terminal 2. Verify the scan tool Liftgate
Latch Pawl Switch parameter is Open.
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. Verify the scan tool Liftgate Latch Ratchet Switch parameter is Closed.
瀚慖f not the specified value, test the signal circuit terminal 6 for a short to ground. If the circuit tests normal, replace the K39 liftgate control
module.
6. Install a 3 A fused jumper wire between the signal circuit terminal 6 and low reference circuit terminal 2. Verify the scan tool Liftgate Latch
Ratchet Switch parameter is Open.
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.
7. Verify the scan tool Liftgate Latch Sector 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.
8. Install a 3 A fused jumper wire between the signal circuit terminal 4 and low reference circuit terminal 2. Verify the scan tool Liftgate Latch
Sector 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.
9. If all circuits test normal, test or replace the A23C liftgate latch assembly.
