Circuit/System Testing
WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Seat Adjuster Switch Circuit Test
- Ignition OFF, disconnect the harness connector at the seat adjuster switch.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal E and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the memory seat module.
- Install a 3A fused jumper wire between the inoperative switch signal circuit terminal and the B+ circuit terminal E. Verify the related scan tool Driver Position Module Seat Switch parameter is Active.
- If not Active, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the memory seat module.
- If all circuits test normal, test or replace the seat adjuster switch.
Motor Control Circuit Test
- Disconnect the (C3) harness connector at the memory seat module.
- Verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Connect the (C3) harness connector at the memory seat module.
- Disconnect the (C1) harness connector at the appropriate seat adjuster motor assembly or seat recline motor.
- Connect a test lamp between the motor control circuit terminals of the inoperative motor.
- Verify that a test lamp illuminates while pressing the seat switch in both directions.
- If the test lamp does not illuminate, test the motor control circuits for an open/high resistance. If the circuits test normal replace the memory seat module.
- If all circuits test normal, test or replace the inoperative seat motor.