Circuit/System Verification

Ignition ON.

NOTE:

Refer to Liftgate System Diagnosis for a guide to power liftgate functions and failure modes to determine the course of action when the power liftgate malfunctions

Verify no other DTCs are set.
- If other DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If no other DTCs are set
Verify the correct calibration software has been programmed into the K39 Liftgate Control Module.
- If the software is not the correct calibration software
  Refer to Control Module References for liftgate control module programming and setup.
- Go to next step: If the calibration software is correct
Verify the liftgate will release and smoothly power open when commanding Liftgate Open with a scan tool.
- If the A23C Liftgate Latch Assembly does not release
  Refer to Liftgate Latch Release/Cinch Malfunction
- If the liftgate releases but does not open
  Refer to Circuit/System Testing - Liftgate Power Open/Close Malfunction
- If the liftgate releases but performs an erratic power open/close motion
  Refer to Circuit/System Testing - Liftgate Erratic Operation
- Go to next step: If the A23C Liftgate Latch Assembly releases
Verify the liftgate will smoothly power close when commanding Liftgate Close with a scan tool.
- If the liftgate does not power close
  Refer to Circuit/System Testing - Liftgate Power Open/Close Malfunction
- If the liftgate performs an erratic open/close motion
  Refer to Circuit/System Testing - Liftgate Erratic Operation
- Go to next step: If the liftgate does smoothly power close
All OK.