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Home >> Cadillac >> 2014 >> CTS Base, 2D Coupe, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 149 (Object Detection System) >> Diagnostic Information and Procedures >> Lane Departure Warning System Malfunction >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2014 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

Lane Departure Warning Switch Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch - Instrument Panel.
  2. Test for less than 10 Ω between the ground circuit terminal 1 and ground.
    • If 10 Ω or greater 
    1. Ignition 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 ground 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 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 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 
  5. Install a 3 A fused jumper wire between the signal circuit terminal 4 and ground.
  6. Verify the scan tool Lane Departure Warning Switch parameter is On.
    • If not On 
    1. Ignition OFF, disconnect the harness connector at the K109 Vehicle 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. 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 
  7. Test or replace the S48D Multifunction Switch - Instrument Panel.

Lane Departure Warning Switch Indicator Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch - Instrument Panel.
  2. Test for less than 10 Ω between the low control circuit terminal 8 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the low 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 Vehicle Camera Module.
    • If less than 10 Ω 
  3. Ignition ON, test for 4.8-5.2 V between the voltage circuit terminal 3 and ground.
    • If less than 4.8 V  
    1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between the voltage circuit and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the voltage 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 greater than 5.2 V 
    1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON.
    2. Test for less than 1 V between the voltage circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K9 Body Control Module.
    • If between 4.8-5.2 V 
  4. Test or replace the S48D Multifunction Switch - Instrument Panel.
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