Inspection Procedure A-5: Electric tailgate automatic operation (open) 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 tailgate gas spring, the door-ajar switch system, the electric tailgate main switch system, or the electric tailgate control unit itself.

PROBABLE CAUSES

A component other than Mitsubishi genuine parts or accessories is fitted on the tailgate.
The quarter trim interferes with the electric tailgate motor arm.
Door-ajar switch system failed
Electric tailgate main switch system malfunction
Damaged tailgate gas spring
Damaged electric tailgate control unit
Damaged wiring harness and connectors

DIAGNOSIS PROCEDURE

STEP 1. 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 2.

Remove the components other than Mitsubishi genuine parts or accessories.

STEP 2. 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 3.

Replace the tailgate gas spring.

STEP 3. 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 4.

Install the electric tailgate control unit or the quarter trim securely.

STEP 4. M.U.T.-III data list

Check the signals related to the electric tailgate operation.

Electric tailgate main switch: OFF → ON
Door-ajar switch: OFF → ON

Item No.	Item name	Normal conditions
Item 1	Main switch	OFF → ON
Item 7	Half door switch	OFF → ON

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 "Electric tailgate 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"

STEP 5. 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.