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Home >> Buick >> 2016 >> Cascada Base >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection System And Pedestrian Protection System >> Diagnostic Information and Procedures >> Rear Vision Camera System Malfunction >> Circuit/System Testing

Circuit/System Testing

NOTE:

Circuit/System Verification must be performed before Circuit/System Testing.

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B87 Rearview Camera. 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 5 and ground.
    • If 10 Ω or greater 

      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 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 a test lamp illuminates between the ignition circuit terminal 6 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 ignition 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 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, refer to Power Mode Mismatch .
    • If the test lamp illuminates 
  5. Engine running, park brake applied, transmission in REVERSE.
  6. Test for greater than 11 V between the control circuit terminal 3 and ground.
    • If less than 11 V 
    1. Ignition OFF, disconnect the X7 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 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 11 V 
  7. Ignition OFF, disconnect the X4 harness connector at the A11 Radio, ignition ON.
  8. Test for less than 1 V between the signal circuit terminal listed below and ground:
    • B87 Rearview Camera signal (+) circuit terminal 1.
    • B87 Rearview Camera signal (-) circuit terminal 4.
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  9. Test for infinite resistance between the signal circuit terminal listed below and ground:
    • B87 Rearview Camera signal (+) circuit terminal 1.
    • B87 Rearview Camera signal (-) circuit terminal 4.
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  10. Test for less than 2 Ω in the following signal circuits end to end:
    • B87 Rearview Camera signal (+) circuit terminal 1 to A11 Radio X4, terminal 5
    • B87 Rearview Camera signal (-) circuit terminal 4 to A11 Radio X4, terminal 15
    • If 2 Ω or greater 

      Repair the open/high resistance in the circuit.

    • If less than 2 Ω 
  11. Replace the B87 Rearview Camera.
  12. Engine running, transmission in REVERSE, verify a clear rear vision image is displayed on the A11 Radio.
    • If a clear rear vision image displayed on the A11 Radio 
  13. All Ok.
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