Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Chevrolet >> 2008 >> HHR LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 626 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> Access Panel Release Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2011 Chevrolet HHR. However, it is still accessible from the selected car via links, so may be relevant.

Access Panel Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the appropriate rear access panel switch.
  2. Test for less than 1 ohm between the ground circuit terminal A and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Access Panel Switch Status parameter is Inactive.
    • If not the specified value, test the signal circuit terminal C for a short to ground. If the circuit tests normal, replace the BCM.
  4. Install a 3A fused jumper wire between the signal circuit terminal C and ground. Verify the scan tool Access Panel Switch Status parameter is Active.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, test or replace the rear access panel switch.

Access Panel Interlock Malfunction

  1. Ignition OFF, disconnect the Door Lock relay.
  2. Test for less than 1 ohm between the ground circuit terminal listed below and ground:
    • Terminal 2
    • Terminal 5
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and the ground circuit terminal 2.
  4. Ignition ON, command the Rear Access Panel Lock Relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the IPC.
    • If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the IPC.
  5. Connect a test lamp between the control circuit terminal 3 and the ground circuit terminal 5.
  6. Command the access panel latches to RELEASE by pressing the rear access panel switch. The test lamp should illuminate while commanding the RELEASE state.
    • If the test lamp does not illuminate, test the control circuit for short to ground or an open/high resistance.
  7. If all circuits test normal, test or replace the Door Lock relay.

Access Panel Release Malfunction

  1. Ignition OFF, disconnect the appropriate Rear Access Panel relay.
  2. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 5 and ground.
    • If the test lamp illuminates, test the control circuit for a short to voltage.
  3. Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the relay controlled output circuit terminal for a short to ground. If the circuit tests normal, test or replace the Rear Access Panel relay.
  4. Verify that a test lamp illuminates between the B+ circuit terminal 3 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
  5. Disconnect the harness connector at the appropriate access panel latch.
  6. Test for less than 5 ohms between the control circuit terminal listed below and ground while commanding the Rear Access Panel Lock Relay ON with a scan tool.
    • Left rear access panel latch circuit terminal 4
    • Right rear access panel latch circuit terminal 9
    • If greater than the specified range, test the control circuit for an open/high resistance.
  7. Connect the harness connector at the access panel latch.
  8. Connect a 20A fused jumper wire between the B+ circuit terminal 3 and the control circuit terminal 5.
  9. Verify the access panel latch is activated while commanding the Rear Access Panel Lock Relay ON with a scan tool.
    • If the access panel latch does not activate, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the access panel latch.
  10. Connect a test lamp between the B+ circuit terminal 1 and the control circuit terminal 2.
  11. Command the Rear Access Panel relay ON and OFF by pressing and releasing the rear access panel switch. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  12. If all circuits test normal, test or replace the Rear Access Panel relay.
scientia non olet · About Mike's Workshop Manuals