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Circuit/System Verification

WARNING: This page is about a different car, the 2011 GMC Acadia, 2011 Chevrolet Traverse, and 2011 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the scan tool LGM Disable Switch parameter while pressing and depressing the Liftgate Enable/Disable button on the I/P multifunction switch. The parameter should change from Inactive to Active.
  2. Observe the scan tool LGM Front Control Switch parameter while pressing and releasing the liftgate button on the I/P multifunction switch. The parameter should change from Inactive and Active.
  3. Observe the Liftgate Handle Sw. Status parameter while pressing and releasing the exterior liftgate control switch and the interior liftgate control switch, the parameter should change from Inactive and Active.
    • If the value does not change, refer to Liftgate Interior/Exterior Control Switch Inoperative in Circuit/System Testing .
  4. With the liftgate closed, observe the scan tool Pawl, Ratchet, and Sector switch parameters. Each parameter status should be as listed below:
    • LGM Latch Pawl Sw. parameter - Inactive
    • LGM Latch Ratchet Sw. parameter - Inactive
    • LGM Latch Sector Sw. parameter - Inactive
  5. Verify the liftgate will manually open
    • If the liftgate does not manually open, refer to Liftgate Latch Release/Cinch Malfunction in Circuit/System Testing .
  6. Verify that the liftgate will remain at or near the full open position for several minutes.
    • If the liftgate will not remain open, replace the liftgate struts.
  7. Observe the scan tool Object Detection Sensor Status parameter. The reading should be between 3V-3.5V.
  8. With the liftgate open, verify the scan tool Pawl, Ratchet, and Sector switch parameters are as listed below:
    • LGM Latch Pawl Sw. parameter - Active
    • LGM Latch Ratchet Sw. parameter - Active
    • LGM Latch Sector Sw. parameter - Inactive
  9. Observe the scan tool LGM Full Open Switch parameter while opening and closing the liftgate. The parameter should change between Active and Inactive as the liftgate is opened and closed.
  10. Liftgate closed, activate the power open function. Verify the liftgate power opens.
    • If the liftgate does not power open, refer to Liftgate Motor Power Open/Close Malfunction in Circuit/System Testing .
  11. Liftgate open, activate the power close function. Verify the liftgate power closes
    • If the liftgate does not power close, refer to Liftgate Motor Power Open/Close Malfunction in Circuit/System Testing .
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