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Home >> Chevrolet >> 2013 >> Trax LS, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection System And Pedestrian Protection System >> Diagnostic Information and Procedures >> DTC B0987 >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF, and all vehicle systems OFF, disconnect the harness connector at the S48E Multifunction Switch - Center Console, ignition ON.
  2. Test for 6.2 - 12.0 V between the dimming control circuit terminal 8 and ground.
    NOTE:

    Verify interior lighting dimming is turned all the way up.

    • If less than 6.2 V 
    1. Ignition OFF, disconnect the X1 harness connector at the K9 Body Control 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
    3. Test for less than 2 Ω in the control circuit end to end.
    • If greater than 12.0 V 
    1. Ignition OFF, disconnect the X1 harness connector at the K9 Body Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit and ground.
    • If between 6.2 - 12.0 V 
  3. Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON.
  4. Test for less than 1 V between the control circuit terminal 6 and ground.
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  5. Ignition OFF.
  6. Test for infinite resistance between the control circuit terminal 6 and ground.
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  7. Test for less than 5 Ω between the K109 Frontview Camera Module terminal 4 and S48E Multifunction Switch - Center Console circuit terminal 6.
    • If greater than 5 Ω 

      Repair the open/high resistance in the circuit.

    • If less than 5 Ω 
  8. Test or replace the S48E Multifunction Switch - Center Console.
  9. Verify the lane departure switch Indicator turns ON and OFF when cycling the S48E Multi-Function Switch - Center Console.
    • If indicator does not turn on and off 

      Replace K109 Frontview Camera Module.

    • If indicator turns on and off  f
  10. All OK.
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