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Home >> Buick >> 2015 >> Verano Base >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection System - Park Assist System >> Diagnostic Information and Procedures >> DTC B0987: Vehicle Direction Camera Indicator >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, and all vehicle systems OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel, ignition ON.
    NOTE:

    Verify interior lighting dimming is turned all the way up.

  2. Verify a test lamp illuminates between the BCM PWM control circuit terminal 12 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF.
    2. 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, verify the fuse is OK and there is voltage at the fuse. If the fuse is OK, replace K9 Body Control Module.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF.
    2. Test for infinite resistance between the ignition circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K109 Front view Camera Module.
    • If the test lamp illuminates 
  3. Connect a test lamp between control circuit terminal 11 and B+.
  4. Verify the test lamp turns ON and OFF when commanding the Lane Departure Warning Indicator Status parameter On and Off with a scan tool.
    • If the test lamp is always OFF 
    1. Ignition OFF, disconnect the harness connector at the K109 Front view Camera Module, ignition ON.
    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 Front view Camera Module.
    • If the test lamp is always ON 
    1. Ignition OFF, disconnect the harness connector at the K109 Front view 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 Front view Camera Module.
    • If the test lamp turns ON and OFF 
  5. Test or replace the S48A Multifunction Switch - Instrument Panel.
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