Inspection Procedure 12: The remote controlled mirror switch (fold switch) signal is not received.


caution Whenever the ECU is replaced, ensure that the input signal circuit is normal.

COMMENTS ON TROUBLE SYMPTOM


Input signal from the remote controlled mirror switch (fold switch) is used to operate the functions below. If the signal is abnormal, these functions will not work normally.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Check the remote controlled mirror switch.


Refer to GROUP 51 - Door Mirror .

Q. Is the check result normal?

Go to Step 2.

Replace the remote controlled mirror switch (Refer to GROUP 51 - Outside Mirror ).

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?

Go to Step 4.

Go to Step 3.

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


Q. Is the check result normal?

Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the connector(s) or wiring harness.

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


Q. Is the check result normal?

Go to Step 5.

Repair the connector(s) or wiring harness.

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


Check the input signals from the remote controlled mirror switch (fold switch).

Item No.
 Item name
 Normal condition
22
 Electric folding door mirror SW
 OFF to ON (only when switch is operated)
OK: Normal condition is displayed.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the ETACS-ECU (Refer to ).