Circuit/System Testing

WARNING: This page is about a different car, the 2020 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF, disconnect the connector at the S48E Floor Console Accessory Function Switch.
Verify a test lamp illuminates between terminal 6 and B+
- If the test lamp does not illuminate
  Repair the open/high resistance on circuit 1751 or the ground connection.
- Go to next step: If the test lamp illuminates
Ignition ON.
Verify the scan tool Traction Control Switch parameter is Inactive.
- If not Inactive
1. Test circuit 1788 for a short to ground.
  - If a short to ground is found, repair the fault on the circuit.
  - Go to next step: If a short to ground is not found
2. Replace the K9 Body Control Module.
- Go to next step: If Inactive
Install a 3 A fused jumper wire between terminal 8 and ground.
Verify the scan tool Traction Control Switch parameter is Active.
- If not Active
1. Test circuit 1788 for an open/high resistance.
  - If an open/high resistance is found, repair the fault on the circuit.
  - Go to next step: If an open/high resistance is not found
2. Replace the K9 Body Control Module.
- Go to next step: If Active
Test or replace the S48E Floor Console Accessory Function Switch.