Inspection Procedure A-3: The power liftgateower liftgate automatic operation does not work normally (both the open operation and close operation do not work): Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. 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 2.
- NO: Remove the components other than Mitsubishi genuine parts or accessories.
STEP 2. Liftgate gas spring check
Visually check the liftgate gas spring for damage. Also, check the manual operation for any problems such as the operation is too light or too heavy.

Q: Is the check result normal?
- YES: Go to Step 3.
- NO: Replace the liftgate gas spring.
STEP 3. 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 4.
- NO: Install the power liftgate control unit or the quarter trim securely.

STEP 4. Using scan tool (M.U.T.-III), check data list.

Check the signals related to the power liftgate operation.

power liftgate main switch: OFF → ON
Door-ajar switch: OFF → ON
Liftgate sensor LH: OFF → ON

Liftgate sensor RH: OFF → ON

Item No.	Item name	Normal conditions
Item 1	Main switch	OFF → ON
Item 7	Half door switch	OFF → ON
Item 9	Touch sensor (left)	OFF → ON
Item 10	Touch sensor (right)	OFF → ON
Item 12	ECU power supply voltage	System voltage

OK: Normal conditions are displayed for all the items.

Q: Is the check result normal?

All are normal.: Go to Step 5.

Normal condition is not displayed for item No. 1.: Refer to INSPECTION PROCEDURE B-1 "POWER LIFTGATE MAIN SWITCH SIGNAL IS NOT RECEIVED" .

Normal condition is not displayed for item No. 7.: Refer to INSPECTION PROCEDURE B-4 "DOOR-AJAR SWITCH SIGNAL IS NOT RECEIVED" .

Normal condition is not displayed for item 9 and 10.: Refer to INSPECTION PROCEDURE B-7 "LIFTGATE SENSOR SIGNAL IS NOT RECEIVED" .

Normal condition is not displayed for item No. 12.: Refer to INSPECTION PROCEDURE A-1 "POWER SUPPLY VOLTAGE ABNORMALITY OF POWER LIFTGATE CONTROL UNIT" .

STEP 5. 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.