Inspection Procedure A-4: Electric tailgate automatic operation (close) does not work normally.


caution Before replacing the ECU, ensure that the input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM


Component other than Mitsubishi genuine parts or accessories is fitted on the tailgate. The quarter trim interferes with the electric tailgate motor arm. There may also be a malfunction in one of the followings; the improperly installed weatherstrip, the tailgate gas spring, the half latch switch system, the neutral switch system or the electric tailgate control unit itself.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Check of electric tailgate control unit learning


When the electric tailgate control unit is replaced, battery is replaced, or fuse is replaced with the tailgate open, the learning of electric tailgate control unit must be performed. With the electric tailgate control unit learning, manually fully close the tailgate that is open.

Q. Is a replacement of electric tailgate control unit, battery, or fuse with tailgate open performed?

Manually fully close the tailgate that is open. Go to Step 7.

Go to Step 2.

STEP 2. Parts installation check of tailgate


Check whether a component other than Mitsubishi genuine parts or accessories is fitted on the tailgate.

Q. Is the check result normal?

Go to Step 3.

Remove the components other than Mitsubishi genuine parts or accessories.

STEP 3. Tailgate gas spring check


Visually check the tailgate gas spring for damage. Also check whether its operation is too smooth or too heavy.

Q. Is the check result normal?

Go to Step 4.

Replace the tailgate gas spring.

STEP 4. Interference inspection: quarter trim and electric tailgate motor arm


Check whether the quarter trim interferes with the electric tailgate motor arm.

Q. Is the check result normal?

Go to Step 5.

Install the electric tailgate 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?

Go to Step 6.

Install the weatherstrip securely.

STEP 6. M.U.T.-III data list


Check the signals related to the electric tailgate operation.

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. System retest


Check whether the electric tailgate works normally.

Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)

Replace the electric tailgate control unit.