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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1780 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> Power Liftgate Malfunction >> Circuit/System Verification
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Circuit/System Verification

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  1. Ignition ON, observe the scan tool LGM Disable Switch parameter while pressing and depressing the Liftgate Enable/Disable button on the interior liftgate control switch. The parameter should change from Inactive to Active.
    • If the value does not change, refer to Interior Liftgate Control Switch Inoperative below.
  2. Observe the scan tool LGM Front Control Switch parameter while pressing and releasing the liftgate button on the interior liftgate control switch. The parameter should change from Inactive and Active.
    • If the value does not change, refer to Interior Liftgate Control Switch Inoperative below.
  3. Observe the Liftgate Handle Sw. Status parameter while pressing and releasing the touchpad on the liftgate handle switch and the liftgate close switch next to the liftgate latch, the parameter should change from Inactive and Active.
    • If the value does not change, refer to Liftgate Handle Switch Inoperative below.
  4. Manually open the liftgate and 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.
  5. Command the LGM Open/Close Test with a scan tool. The liftgate should OPEN and CLOSE as commanded.
    • If the liftgate fails to OPEN and CLOSE, refer to Power Liftgate Inoperative below.
    • If the liftgate closes and immediately reopens, refer to Liftgate Closes and Reopens below.
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