Inspection Procedure 1: Electric-folding door mirrors do not work at all.


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 )

OPERATION
The ETACS-ECU operates this function in accordance with the input signals below.

  • Ignition switch (ACC)
  • Electric remote controlled mirror switch (folding/unfolding switch)

COMMENTS ON TROUBLE SYMPTOM
If the system does not work, the input circuit from the ignition switch (ACC) or the remote controlled mirror switch (folding/unfolding switch), or the ETACS-ECU may be faulty.

PROBABLE CAUSES

  • Defective remote controlled mirror switch
  • Defective ignition switch (ACC)
  • Malfunction of ETACS-ECU
  • Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III diagnosis code
Check if an ETACS-related diagnosis code is set.

Q. Is the diagnosis code set?
Troubleshoot the ETACS. (Refer to GROUP 54A - ETACS, Diagnosis Code Chart .)
Go to Step 2.

STEP 2. M.U.T.-III data list
Check the input signals which are related to the electric folding door mirrors.

  • Ignition switch: ACC
  • Electric remote controlled mirror switch (folding/unfolding switch): ON
Item No.
 Item name
 Normal conditions
Item 267
 Mirror switch
 ON
Item 288
 ACC switch
 ON
OK: Normal conditions are displayed for all the items.

Q. Is the check result normal?
Normal conditions are displayed for all the items. : Go to Step 3.
Normal condition is not displayed for item No. 267. : Refer to GROUP 54A - ETACS, Inspection Procedure 13 "The remote controlled mirror switch (fold switch) signal is not received." .
Normal condition is not displayed for item No. 288. : Refer to GROUP 54A - ETACS, Inspection Procedure 1 "The ignition switch (ACC) signal is not received." .

STEP 3. M.U.T.-III data list
Check the data list which are related to the electric folding door mirrors.

  • Turn on the folding/unfolding switch when the door mirrors are folded.
Item No.
 Item name
 Normal conditions
Item 241
 Hold mirror open
 ON
Item 242
 Hold mirror close
 Off

  • Turn on the folding/unfolding switch when the door mirrors are unfolded.
Item No.
 Item name
 Normal conditions
Item 241
 Hold mirror open
 Off
Item 242
 Hold mirror close
 ON
OK: Normal condition is displayed.

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

STEP 4. Check of short to power supply, short to earth, and open circuit in +B2 line between fusible link and ETACS-ECU connector

Q. Is the check result normal?
Go to Step 5.
Repair the connector(s) or wiring harness.

STEP 5. 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.