Inspection Procedure 2: One of electric-folding door mirrors does not work.


caution
  • 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 )

COMMENTS ON TROUBLE SYMPTOM
If one of the electric folding door mirrors does not work, either door mirror assembly may be defective.

PROBABLE CAUSES

  • Malfunction of the door mirror assembly
  • Malfunction of ETACS-ECU
  • Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

STEP 1. Determine a trouble spot.

Q. Which of the door mirrors cannot be folded/unfolded?
RH side door mirror : Go to Step 2.
LH side door mirror : Go to Step 4.

STEP 2. Check the door mirror assembly (RH).
Check that the door mirror assembly (RH) works normally (Refer to ).

Q. Is the check result normal?

Go to Step 3.
Replace the door mirror assembly (RH).

STEP 3. Check of short to power supply, short to earth, and open circuit in MO-1&MO-2, MC-1&MC-2 line between ETACS-ECU connector and door mirror assembly (RH) connector

Q. Is the check result normal?
Go to Step 6.
Repair the connector(s) or wiring harness.

STEP 4. Check the door mirror assembly (LH).
Check that the door mirror assembly (LH) works normally (Refer to ).

Q. Is the check result normal?

Go to Step 5.
Replace the door mirror assembly (LH).

STEP 5. Check of short to power supply, short to earth, and open circuit in MO-1&MO-2, MC-1&MC-2 line between ETACS-ECU connector and door mirror assembly (LH) connector

Q. Is the check result normal?
Go to Step 6.
Repair the connector(s) or wiring harness.

STEP 6. Retest the system.
Check that the electric folding door mirrors 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 ETACS-ECU.