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Home >> Hummer >> 2009 >> H3 Base, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Collision/Avoidance >> Object Detection System >> Diagnostic Information and Procedures >> Rear Vision Camera System Malfunction (H3) >> Circuit/System Testing >> Rearview Camera System Does Not Display

Rearview Camera System Does Not Display

  1. Ignition OFF, disconnect the harness connector at the rearview camera image display module.
  2. Test for less than 1.0 ohm between the ground circuit terminal 3 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Engine running, verify that a test lamp illuminates between the ignition circuit terminal 2 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, test for B+ between the B+ circuit terminal 1 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, connect the harness connector at the rearview camera image display module. Disconnect the harness connector at the rearview camera.
  6. Test for less than 1.0 ohm between the ground circuit terminal B and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the rearview camera image display module.
  7. Engine running, park brake applied, vehicle in REVERSE, test for 5.8-6.2 volts between the 6-volt reference circuit terminal A and ground.
    • If less than the specified range, test the 6-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rearview camera image display module.
    • If greater than the specified range, test the 6-volt reference circuit for a short to voltage. If the circuit tests normal, replace the rearview camera image display module.
  8. Ignition OFF, disconnect the harness connector at the rearview camera image display module.
  9. Test for less then 1 ohm between the shield ground circuit terminal 10 at the rearview camera display module harness connector and terminal D at the rearview camera harness connector.
    • If greater than the specified range, test the shield ground circuit for an open/high resistance.
  10. Ignition ON, test for less than 1 volt between the signal circuit terminal 9 and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage.
  11. Test for infinite resistance between the signal circuit terminal 9 and ground.
    • If less than the specified value, test the signal circuit for a short to ground.
  12. Test for less then 1 ohm between the signal circuit terminal 9 at the rearview camera display module harness connector and terminal C at the rearview camera harness connector.
    • If greater than the specified range, test the signal circuit for an open/high resistance.
  13. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
  14. Ignition ON, test for less than 1 volt between the following signal circuits at the inside rearview mirror harness connector and ground:
    • Video + signal circuit terminal 1
    • Video - signal circuit terminal 2
    • If greater than the specified range, test the signal circuit for a short to voltage.
  15. Test for infinite resistance between the following signal circuits at the inside rearview mirror harness connector and ground:
    • Video + signal circuit terminal 1
    • Video - signal circuit terminal 2
    • If greater than the specified value, test the signal circuit for a short to ground.
  16. Test for less then 1 ohm between the following signal circuits:
    • Signal circuit terminal 12 at the rearview camera image module and terminal 1 at the inside rearview mirror.
    • Signal circuit terminal 11 at the rearview camera image module and terminal 2 at the inside rearview mirror.
    • If greater than the specified range, test the signal circuit for an open/high resistance.
  17. If all circuits test normal, test or replace the rearview camera.
  18. Engine running, park brake applied, vehicle in REVERSE, verify a clear rear vision image is displayed on the radio.
    • If a clear rear vision image is not displayed, test or replace the inside rearview mirror.
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