Inspection Procedure A-4: Power liftgate automatic operation (close) does not work normally: Diagnosis
- STEP 1. Check of power liftgate control unit learning
When the power liftgate control unit is replaced, battery is replaced, or fuse is replaced with the liftgate open, the learning of power liftgate control unit must be performed. With the power liftgate control unit learning, manually fully close the liftgate that is open.
Q: Is a replacement of power liftgate control unit, battery, or fuse with liftgate open performed?
- YES: Manually fully close the liftgate that is open. Go to Step 7.
- NO: Go to Step 2.
- STEP 2. Parts installation check of liftgate
Check whether a component other than Mitsubishi genuine parts or accessories is fitted on the liftgate.
Q: Is the check result normal?
- YES: Go to Step 3.
- NO: Remove the components other than Mitsubishi genuine parts or accessories.
- STEP 3. Liftgate gas spring check
Visually check the liftgate gas spring for damage. Also check whether its operation is too smooth or too heavy.
Q: Is the check result normal?
- YES: Go to Step 4.
- NO: Replace the liftgate gas spring.
- STEP 4. Interference inspection: quarter trim and power liftgate motor arm
Check whether the quarter trim interferes with the power liftgate motor arm.
Q: Is the check result normal?
- YES: Go to Step 5.
- NO: Install the power liftgate control unit or the quarter trim securely.
- STEP 5. Weatherstrip installation check
Is the weatherstrip installed properly? Also check whether the weatherstrip is loose.
Q: Is the check result normal?
- YES: Go to Step 6.
- NO: Install the weatherstrip securely.
- STEP 6. Using scan tool (M.U.T.-III), check data list.
Check the signals related to the power liftgate operation.
- Half latch switch: OFF → ON
- Neutral switch: OFF → ON
Item No. Item name Normal conditions Item 5 Half latch switch OFF → ON Item 8 Neutral switch OFF → ON OK: Normal conditions are displayed for all the items.
Q: Is the check result normal?
All are normal.: Go to Step 7.
Normal condition is not displayed for item No. 5.: Refer to INSPECTION PROCEDURE B-6 "HALF LATCH SWITCH SIGNAL IS NOT RECEIVED" .
Normal condition is not displayed for item No. 8.: Refer to INSPECTION PROCEDURE B-5 "NEUTRAL SWITCH SIGNAL IS NOT RECEIVED" .
- STEP 7. Check of the troubles
Check whether the power liftgate works normally.
Q: Is the check result normal?
- YES: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
- NO: Replace the power liftgate control unit.