Inspection Procedure P-19: Signal is not received from the remote controlled mirror switch (folding/unfolding switch).


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


COMMENTS ON TROUBLE SYMPTOM
The electric-folding door mirrors work in accordance with the input signal from the remote controlled mirror switch. If the input signal is abnormal, the door mirrors will not work normally.

POSSIBLE CAUSES

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

DIAGNOSIS PROCEDURE

Step 1. Connector check: C-129 remote controlled mirror switch connector


Q. Is the check result normal?

Go to Step 2.

Repair the connector.

Step 2. Check the remote controlled mirror switch.
Refer to GROUP 51 - Door mirror .

Q. Is the check result normal?
Go to Step 3.
Replace the remote controlled mirror switch.

Step 3. Resistance measurement at the C-129 remote controlled mirror switch connector.


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

(2)Continuity between C-129 remote controlled mirror switch connector terminal No.1 and body earth
OK: 2Ω or less

Q. Is the check result normal?

Go to Step 5.

Go to Step 4.

Step 4. Check the wiring harness between C-129 remote controlled mirror switch connector terminal No.1 to body earth.



note Prior to the wiring harness inspection, check joint connector C-01 <RH drive vehicles>, and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

Step 5. Connector check: C-220 ETACS-ECU connector


Q. Is the check result normal?

Go to Step 6.

Repair the connector.

Step 6. Check the wiring harness between C-129 remote controlled mirror switch connector terminal No.4 to C-220 ETACS-ECU connector terminal No.24.





  • Check the input line for open circuit.

Q. Is the check result normal?

Go to Step 7.

Repair the wiring harness.

Step 7. ETACS switch data by using the SWS monitor
Check the input signal from the remote controlled mirror switch.

  • Ignition switch: ON
  • Remote controlled mirror (folding/unfolding) switch: from OFF to ON
Item No.
 Item name
 Normal condition
Item 14
 EL RET MIR 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 Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.