Inspection Procedure A-2: Electric tailgate automatic operation and easy closer system do not work normally.

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


The wiring harness or its connector(s) between the ETACS-ECU and the electric tailgate control unit, the ETACS-ECU itself or the electric tailgate control unit itself may be defective.



STEP 1. Keyless entry system operation check.

Check that the door lock/unlock is performed when the keyless operation key is operated.

Q. Is the check result normal?

Go to Step 2.

Refer to GROUP 42B - Trouble Symptom Chart .

STEP 2. M.U.T.-III CAN bus diagnostics

Use M.U.T.-III to diagnose the CAN bus lines.

Q. Is the CAN bus normal?

Go to Step 3.

Repair the CAN bus line. (Refer to GROUP 54C - CAN Bus Line Trouble Symptom Chart .)

STEP 3. M.U.T.-III diagnosis code

Check that ETACS-ECU sets a diagnosis code.

Q. Is the diagnosis code set?

Refer to GROUP 54A - Diagnosis Code Chart .

Go to Step 4.

STEP 4. M.U.T.-III diagnosis code

(1)Operate the electric tailgate.
(2)Check whether a diagnosis code is set in the electric tailgate control unit.

Q. Is the diagnosis code set?

Refer to diagnosis code chart .

Go to Step 5.

STEP 5. M.U.T.-III data list

Check the signals related to the electric tailgate operation.

Item No.
Item name
Normal conditions
Item 12
ECU power supply voltage
System voltage
OK: Normal conditions are displayed for all the items.

Q. Is the check result normal?

Go to Step 6.

Refer to Inspection Procedure A-1 "Power supply voltage abnormality of electric tailgate control unit" .

STEP 6. System retest

Check that the electric tailgate and the easy closer system work 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.