Inspection Procedure C-18: 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.

PROBABLE CAUSES

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

DIAGNOSIS PROCEDURE

STEP 1. Connector check: D-29 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 - Outside mirror .

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

STEP 3. Resistance measurement at D-29 remote controlled mirror switch connector.
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Continuity between D-29 remote controlled mirror switch connector terminal No.1 and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?
Go to Step 5.
Go to Step 4.

STEP 4. Check the wiring harness between D-29 remote controlled mirror switch connector terminal No.1 and body earth.
note Prior to the wiring harness inspection, check joint connector D-34, 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: D-421 ETACS-ECU connector

Q. Is the check result normal?
Go to Step 6.
Repair the connector.

STEP 6. Check the wiring harness between D-29 remote controlled mirror switch connector terminal No.4 and D-421 ETACS-ECU connector terminal No.24.

  • Check the input line for open and short circuit.

Q. Is the check result normal?
Go to Step 7.
Repair the wiring harness.

STEP 7. Retest the system.
Check that the remote controlled mirror switch signal is received normally.

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.