Circuit/System Testing

Lane Departure Warning Switch Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S16 Driver Information Center Switch. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 7 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 
3. Ignition ON.
4. Verify the scan tool Lane Departure Warning Switch Status parameter is Open.
   • If not Open 
   1. Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module.
   2. Test for infinite resistance between the signal circuit terminal 14 at the S16 Driver Information Center Switch 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 
5. Reconnect the harness at S16 Driver Information Center Switch. Ignition ON.
6. Verify the scan tool Lane Departure Warning Switch Status parameter while pressing and releasing the vehicle direction warning switch. The parameter should change between Open and Closed.
   • If the parameter does not change 

     Test or replace the S16 Driver Information Center Switch.

   • If the parameter changes 
7. All OK.

Lane Departure Warning Switch Indicator Malfunction

1. Ignition OFF, disconnect the harness connector at the S16 Driver Information Center Switch, ignition ON.
2. Verify a test lamp illuminates when placed between the PWM voltage control terminal 12 and ground.
   NOTE:

   Verify vehicle interior dimming control is set all the way bright.

   • If test lamp does not illuminate 

     Refer to Interior Backlighting Malfunction

   • If the test lamp illuminates 
3. Connect a test lamp between PWM voltage control circuit terminal 12 and the control circuit terminal 13
4. Verify the test lamp turns ON and OFF while commanding the Lane Departure Warning Switch Indicator output control On and Off with a scan tool.
   • If the test lamp is always OFF 
   1. Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module.
   2. Test for less than 1 V between the control 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 control 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 the test lamp is always ON 
   1. Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module.
   2. Test for infinite resistance between the control circuit 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 the test lamp turns ON and OFF 
5. Test or replace the S16 Driver Information Center Switch.