Inspection Procedure 13: The remote controlled mirror switch (fold switch) signal is not received.

caution

Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit 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 Immobilizer System - How to Register Key ID .)

COMMENTS ON TROUBLE SYMPTOM

Electric-folding door mirrors

PROBABLE CAUSES

Malfunction of the remote controlled mirror switch
Malfunction of the ETACS-ECU
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the remote controlled mirror switch.

Q. Is the check result normal?

STEP 2. Resistance measurement at remote controlled mirror switch connector (earth terminal)

(1)Disconnect the connector, and measure at the wiring harness side.

(2)Measure the resistance between the remote controlled mirror switch connector (earth terminal) and body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

STEP 3. Check of open circuit in earth line between remote controlled mirror switch connector and body earth

Q. Is the check result normal?

STEP 4. Check of short to power supply, short to earth, and open circuit in MRR line between ETACS-ECU connector and remote controlled mirror switch connector

Q. Is the check result normal?

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

Operate the remote controlled mirror switch (fold switch).

Item No.	Item name	Normal condition
267	Mirror switch	OFF to ON (only when switch is operated)

OK: Normal condition is displayed.