Circuit/System Testing

Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the S126 Drive Mode Switch. It may take up to 2 minutes for all vehicle systems to power down.
Test for less than 10 Ω between the ground circuit terminal 4 and ground
- If 10 Ω or greater
1. Vehicle OFF.
2. Test for less than 2 Ω in the ground circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, repair the open/high resistance in the ground connection.
- If less than 10 Ω
Vehicle ON.
Test for 12V between the signal circuit terminal 1 and ground.
- If not 12V
1. Vehicle OFF, disconnect the harness connector at the K9 X6 Body Control Module.
2. Test for infinite resistance between the signal circuit terminal 22 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 12V
Install a 3 A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 4.
Verify the Drive Mode Status changes state.
- If the Drive Mode Status does not change state
1. Vehicle OFF, disconnect the harness connector at the K9 X6 Body Control Module, Vehicle ON.
2. Test for less than 1 V between the signal circuit and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V
3. Test for less than 2 Ω in the signal circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the K9 Body Control Module.
- If Drive Mode Status does change state
Test or replace the S126 Drive Mode Switch.