Circuit/System Testing

Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S58A Rear Compartment Lid Unlatch Switch-Exterior. It may take up to 2 minutes for all vehicle systems to power down.
Test for less than 10Ω between the ground circuit terminal 3 and ground.
- If 10Ω or greater
1. Ignition OFF.
2. Test for less than 2Ω in the ground circuit end to end.
  - If 2Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2Ω, replace the K9 Body Control Module.
- If less than 10Ω
Ignition ON.
Verify the scan tool Trunk Lid/Liftgate Window Exterior Unlatch Switch parameter is Inactive.
- If not Inactive
1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.
2. Test for infinite resistance between the signal circuit terminal 1 and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance, replace the K9 Body Control Module.
- If Inactive
Install a 3A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 3.
Verify the scan tool Trunk Lid/Liftgate Window Exterior Unlatch Switch parameter is Active.
- If not Active
1. Ignition OFF, remove the 3A fused jumper wire, disconnect the harness connector at the K9 Body Control Module, ignition ON.
2. Test for less than 1V between the signal circuit and ground.
  - If 1V or greater, repair the short to voltage on the circuit.
  - If less than 1V
3. Test for less than 2Ω in the signal circuit end to end.
  - If 2Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2Ω, replace the K9 Body Control Module.
- If Active
Test or replace the S58A Rear Compartment Lid Unlatch Switch-Exterior.