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Circuit/System Testing

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Rearview Camera System Always On

  1. Ignition OFF, disconnect the harness connector X1 at the rearview camera.
  2. Ignition ON, vehicle in PARK, verify a test lamp does not illuminate between the control circuit X1 terminal 3 and ground.
  3. If all circuits test normal, test or replace the rearview camera.

Rearview Camera System Does Not Display

  1. Ignition OFF, disconnect the harness connectors X1 and X2 at the rearview camera.
  2. Test for less than 10 Ω between the ground circuit X1 terminal 2 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Engine running, verify a test lamp illuminates between the ignition circuit X2 terminal 4 and ground.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  4. Park brake applied, transmission in REVERSE, engine running, test for B+ between the B+ circuit X1 terminal 3 and ground.
    • If less than the specified value, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  5. Ignition OFF, disconnect the X4 harness connector at the radio.
  6. Engine running, test for less than 1 V between the following signal circuit terminals at the rearview camera harness connector and ground:
    • Signal (+) circuit X2 terminal 1
    • Signal (-) circuit X1 terminal 1
    • If greater than the specified range, test the signal circuit for a short to voltage.
  7. Test for infinite resistance between the following circuit terminals at the rearview camera harness connector and ground:
    • Signal (+) circuit X2 terminal 1
    • Signal (-) circuit X1 terminal 1
    • If not the specified value, test the circuit for a short to ground.
  8. Test for less than 2 Ω between the signal (+) circuit X2 terminal 1 at the rearview camera harness connector and the signal (+) circuit terminal 6 at the radio harness connector
    • If greater than the specified range, test the signal circuit for an open/high resistance.
  9. Test for less than 2 Ω between the signal (-) circuit X1 terminal 1 at the rearview camera harness connector and the signal (-) circuit terminal 7 at the radio harness connector.
    • If greater than the specified range, test the signal circuit for an open/high resistance.
  10. If all circuits test normal, test or replace the rearview camera.
  11. Engine running, transmission in REVERSE, verify a clear rear vision image is displayed on the radio.
    • If a clear rear vision image is not displayed, replace the radio.
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