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Home >> Chevrolet >> 2013 >> Sonic RS, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 670 (Object Detection System And Pedestrian Protection System) >> Diagnostic Information and Procedures >> Forward Collision Alert System Malfunction >> Circuit/System Testing
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Circuit/System Testing

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

Forward Collision Alert Switch Malfunction

  1. Ignition ON and all vehicle systems OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left. It may take up to 2 min 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. 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 Status parameter is Open.
    • If not active 
    1. Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module.
    2. Test for infinite resistance between the 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 Inactive 
  5. Connect the harness connector at the S70L Steering Wheel Controls Switch - Left.
  6. Verify the scan tool Lane Departure Warning Switch Status parameter changes between Open and Closed when pressing and releasing the lane departure warning switch.
    • If not active 
    1. Ignition OFF, 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 Active 
  7. Test or replace the S70L Steering Wheel Controls Switch - Left.

Forward Collision Alert Indicator Malfunction

  1. Ignition OFF, disconnect the harness connector at the P43 Collision Alert Indicators, ignition ON.
  2. Verify a test lamp illuminates between the control circuit terminal 1 and ground.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the X1 harness connector at the K9 Body Control Module.
    2. Test for less than 2 Ω in the control circuit end to end.
    • If the test lamp illuminates 
  3. Connect a test lamp between the control circuit terminal 5 and the control circuit terminal 1.
  4. Verify the test lamp turns ON and OFF when commanding the Instrument Cluster All Indicators On and Off with a scan tool.
    • If the test lamp is always OFF 
    1. Ignition OFF, disconnect the harness connector at the P16 Instrument Cluster, ignition ON.
    2. Test for infinite resistance between the voltage circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the P16 Instrument Cluster.
      • If the test lamp turns ON and OFF 
  5. Connect a test lamp between the control circuit terminal 4 and the control circuit terminal 1.
  6. Verify the test lamp turns ON and OFF when commanding the Instrument Cluster All Indicators 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, 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
    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 P16 Instrument Cluster.
    • 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 voltage circuit and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • If infinite resistance, replace the P16 Instrument Cluster.
    • If the test lamp turns ON and OFF 
  7. Test or replace the P43 Collision Alert Indicators.
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