LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Object Detection System And Pedestrian Protection System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC B0987: Vehicle Direction Camera Indicator Circuit (UGN) >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel, ignition ON.
  2. Verify a test lamp illuminates between the control circuit terminal 3 and ground.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the 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. Ignition OFF, connect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel. Disconnect the X1 harness connector at the K124 Active Safety Control Module, ignition ON.
  4. Verify the lane departure warning switch indicator is not illuminated.
    • If the lane departure warning switch indicator is illuminated 
    1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel.
    2. Test for infinite resistance between the S48D Multifunction Switch 2 - Instrument Panel control circuit terminal 9 and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • If infinite resistance, replace the S48D Multifunction Switch 2 - Instrument Panel.
    • If the lane departure warning switch indicator is not illuminated 
  5. Connect a 3 A fused jumper wire between the control circuit terminal 3 and ground.
  6. Verify the lane departure warning switch indicator is illuminated.
    • If the lane departure warning switch indicator is not illuminated 
    1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel.
    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 S48D Multifunction Switch 2 - Instrument Panel.
    • If the lane departure warning switch indicator is illuminated 
  7. Replace the K124 Active Safety Control Module.
scientia non olet · About LEMON Manuals