Circuit/System Testing

Ignition OFF.
Remove the ignition key, open the driver door, disconnect the scan tool, all vehicle systems OFF, this may take up to 2 min.
Disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel.
Test for less than 10 Ω between the ground circuit terminal 1 and ground.
- If 10 Ω or greater
1. 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
Ignition ON.
Verify the scan tool Vehicle Direction Warning Switch Status parameter is Off.
- If not Off
1. Ignition OFF, disconnect the harness connector at the K109 Vehicle Camera Module.
2. Test for infinite resistance between the signal circuit terminal 4 at the S48D Multifunction Switch 2 - Instrument Panel and ground.
- If less than infinite resistance, repair the short to ground on the circuit.
- If infinite resistance, replace the K109 Vehicle Camera Module.
- If Off
Disconnect the harness connector at the K109 Vehicle Camera Module.
Install a 3 A fused jumper wire between the signal circuit terminal 4 and ground circuit terminal 1.
Verify within 10 s the scan tool Vehicle Direction Warning Switch Status parameter is On.
- If not On
1. Test for less than 1 V between the signal circuit terminal 4 and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V.
2. 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 K109 Vehicle Camera Module.
- If On
Replace the S48D Multifunction Switch 2 - Instrument Panel.