Diagnostic Aids

If the driver information center displays the message "Service Power Liftgate" and no current or history DTCs are set, please perform the scan tool command Rear Gate Driver Information Center Message Reset to clear the message from the driver information center

Check the calibration software installed on the rear gate module prior to performing extensive diagnostics, vehicles with the rear closure hands free release system option (TC2) require specific calibration software. Incorrect calibration software may cause the power liftgate system to become inoperative without setting any DTCs

A fault in the rear wiper system may cause the power liftgate system and the liftgate window release to become inoperative without setting any DTCs, verify the operation of the rear wiper system prior to performing extensive power liftgate or liftgate window release diagnostics. Refer to Rear Wiper System Malfunction

If the liftgate will not release from the closed position, refer to Opening the Liftgate Without Electrical Power for the appropriate procedure

Power liftgate function will only be allowed if certain operating criteria are met. Any of the following may cause the power liftgate not to function:

• Vehicle is not in park
• System voltage is below 10.5 V
• Engine is cranking
• The vehicle doors are locked
• A rear gate module DTC is set
• Liftgate motor excess current is detected which may be caused by a misaligned liftgate striker
• Interior trim and/or liftgate wedge/bumper misalignment
• Remote power liftgate functions may be disabled if a second keyless entry transmitter is inside the vehicle

Whenever the rear gate module loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the rear gate module.