Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. Erase the DTCs.
4. Turn the ignition off, wait 10 seconds, then turn the ignition on.
5. Operate the liftgate to the full up position and wait 30 seconds.
6. Close the liftgate and repeat the previous step.
7. With the scan tool, read the PLGM DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK FOR A WEAK STRUT
1. Manually open the liftgate to approximately 1/4 open position.
2. Let go of the liftgate and see if it will close quickly with no resistance.
3. If necessary, compare the effort to open and close the liftgate with a known good vehicle.
  NOTE:
  At this point the liftgate should hold in this position but it may slip down very slowly which is allowable.
  
  Does the liftgate hold in position or lower very slowly?
  
  Yes
  - If this vehicle continues to set this DTC, replace the Liftgate Gas Prop (strut) in accordance with the Service Information. Refer to PROP, GAS, LIFTGATE, REMOVAL AND INSTALLATION .
  - Test Complete.
  No
  - Replace the Liftgate Gas Prop (strut) in accordance with the Service Information. Refer to PROP, GAS, LIFTGATE, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .