Circuit/System Testing

Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel. It may take up to 2 minutes for all vehicle systems to power down.
Test for less than 10 Ω between the S48D Multifunction Switch 2 - Instrument Panel ground circuit terminal 15 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 Lane Departure Warning Switch Status parameter is Open.
- If not Open
1. Ignition OFF. Disconnect the K109 Frontview Camera Module.
2. Test for infinite resistance between the S48D Multifunction Switch 2 - Instrument Panel signal circuit terminal 12 and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance, replace the K109 Frontview Camera Module.
  - If Open
Install a 3 A fused jumper wire between the signal circuit terminal 12 and ground circuit terminal 15.
Verify the scan tool Lane Departure Warning Switch Status parameter is Closed.
- If not Closed
1. Ignition OFF, remove the jumper wire, disconnect the harness connector at the K109 Frontview Camera Module, ignition 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. Ignition OFF
4. 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 Frontview Camera Module.
- If Closed
Test or replace the S48D Multifunction Switch 2 - Instrument Panel.