Inspection Procedure 3: Electric-folding door mirror timer function does not work normally.

  • Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in GROUP 54A, Immobilizer System - How to Register Key ID )


If the door mirrors can be operated by using the electric remote controlled mirror switch (folding/unfolding switch), the ETACS-ECU may be faulty.


  • Malfunction of ETACS-ECU


STEP 1. Check the operation of the electric-folding door mirror.

Check that the electric folding door mirrors can work normally with the ignition switch at ACC.

  • Ignition switch: ACC

Q. Is the check result normal?

Go to Step 2.
Refer to Inspection Procedure 1 "Electric-folding door mirrors do not work at all ."

STEP 2. M.U.T.-III diagnosis code

Check if an ETACS-related diagnosis code is set.

Q. Is the diagnosis code set?

Troubleshoot the ETACS. (Refer To GROUP 54A - ETACS, Diagnosis Code Chart .)
Go to Step 3.

STEP 3. Retest the system.

Check that the electric-folding door mirror timer function 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 ETACS-ECU.