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Home >> Saturn >> 2007 >> Relay 3.9 1 >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> Power Liftgate Inoperative >> Circuit/System Testing >> Latch Assembly Malfunction

Latch Assembly Malfunction

WARNING: This page is about a different car, the 2007 Saturn Outlook. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the Liftgate Latch Assembly.
  2. Ignition OFF, test for less than 1.0 ohm of resistance between the Release control circuit terminal 1 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the PLGM.
  3. Ignition OFF, test for less than 1.0 ohm of resistance between the Cinch control circuit terminal 3 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the PLGM.
  4. Connect a test lamp between control circuit terminal 1 and control circuit terminal 3.
  5. Command the Liftgate to OPEN and CLOSE with a scan tool. The test lamp should turn ON when commanding the OPEN and CLOSE states.
    • If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuits test normal, replace the PLGM.
  6. Ignition OFF, test for less than 1.0 ohm of resistance between the low reference circuit terminal 2 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the PLGM.
  7. Ignition ON, verify the scan tool Pawl Sw. parameter is INACTIVE.
    • If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the PLGM.
  8. Ignition ON, verify the scan tool Ratchet Sw. parameter is INACTIVE.
    • If not the specified value, test the signal circuit terminal 6 for a short to ground. If the circuit tests normal, replace the PLGM.
  9. Ignition ON, verify the scan tool Sector Sw. parameter is INACTIVE.
    • If not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the PLGM.
  10. Install a 3A fused jumper wire between the signal circuit terminal 5 and low reference circuit terminal 2. Verify the scan tool Pawl Sw. parameter is ACTIVE.
    • If not the specified value, test the signal circuit terminal 5 for a short to voltage or an open/high resistance. If the circuit tests normal, replace the PLGM.
  11. Install a 3A fused jumper wire between the signal circuit terminal 6 and low reference circuit terminal 2. Verify the scan tool Ratchet Sw. parameter is ACTIVE.
    • If not the specified value, test the signal circuit terminal 6 for a short to voltage or an open/high resistance. If the circuit tests normal, replace the PLGM.
  12. Install a 3A fused jumper wire between the signal circuit terminal 4 and low reference circuit terminal 2. Verify the scan tool Sector Sw. parameter is ACTIVE.
    • If not the specified value, test the signal circuit terminal 4 for a short to voltage or an open/high resistance. If the circuit tests normal, replace the PLGM.
  13. If all circuits test normal, test or replace the Liftgate Latch Assembly.
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