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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1767 (OBJECT DETECTION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESSIDE OBJECT SENSOR MALFUNCTIONCIRCUIT/SYSTEM TESTING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Circuit/System Testing

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

Right Side Object Sensor Malfunction

  1. Ignition OFF, disconnect the harness connector at the right side object sensor.
  2. Test for less than 5 ohms between the ground circuit terminals listed below and ground:
    • Terminal 5
    • Terminal 6
    • If greater than the specified range, test the appropriate ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the right side object sensor.

Left Side Object Sensor Malfunction

  1. Ignition OFF, disconnect the harness connector at the left side object sensor.
  2. Test for less than 5 ohms between the ground circuit terminal 5 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Ignition OFF, disconnect the harness connector at the right side object sensor.
  5. Ignition ON, test for less than 1 volt between the serial data circuit terminal 4 and ground.
    • If greater than the specified range, test the serial data circuit for a short to ground.
  6. Test for infinite resistance between the serial data circuit terminal 4 and ground.
    • If not the specified value, test the serial data circuit for a short to ground.
  7. Test for less than 2 ohms between the serial data circuit terminal 4 at the left side object sensor harness connector and the serial data circuit terminal 4 at the right side object sensor harness connector.
    • If greater than the specified range, test the serial data circuit for an open/high resistance.
  8. If all circuits test normal, replace the left side object sensor.

Side Object Indicator Malfunction

  1. Ignition OFF, disconnect the X3 and X4 harness connectors at the appropriqate door module.
  2. Install a 3A fused jumper wire between the control circuit terminal 4 X3 and B+. Install a jumper wire between the low reference circuit terminal 7 X4 and ground.
  3. Ignition ON, verify the indicator is illuminated.
    • If the indicator is not illuminated, test the control circuit and the low reference circuit for a short to voltage, short to ground, or an open/high resistance. If the circuits test normal, test or replace the appropriate outside rearview mirror.
  4. If all circuits test normal, replace the appropriate door module.
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