INSPECTION PROCEDURE 1: Electric-folding door mirrors do not work at all.


caution Whenever ECU is replaced, ensure that the input and output signal circuits are normal.

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 .
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
Item No.
 Item name
 Normal conditions
Item 288
 ACC switch
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 3.
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 input signals 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 10.
Go to Step 4.

STEP 4. Check the F-12 remote controlled mirror switch connector

Q. Is the check result normal?
Go to Step 5.
Repair the damaged connector.

STEP 5. Check the remote controlled mirror switch.
Check that the remote controlled mirror switch is normal.(Refer to .)

Q. Is the check result normal?
Go to Step 6.
Replace the remote controlled mirror switch.

STEP 6. Measure the resistance at the F-12 remote controlled mirror switch connector.
(1)Disconnect the connector, and measure the resistance at the wiring harness-side connector.
(2)Measure the resistance between F-12 remote controlled mirror switch connector terminal No. 1 and body earth.
OK: Continuity (2 Ω or less)

Q. Is the check result normal?
Go to Step 8.
Go to Step 7.

STEP 7. Check the wiring harness between F-12 remote controlled mirror switch connector terminal No. 1 and body earth.

  • Check the earth wires for open circuit.

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 .)
Repair the wiring harness.

STEP 8. Check the C-411 ETACS-ECU connector

Q. Is the check result normal?
Go to Step 9.
Repair the damaged connector.

STEP 9. Check the wiring harness between C-411 ETACS-ECU connector terminal No. 24 and F-12 remote controlled mirror switch connector terminal No. 4.
note Prior to the wiring harness inspection, check the C-225 intermediate connector, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?
Go to Step 10.
Repair the wiring harness.

STEP 10. Check the C-408 ETACS-ECU connector

Q. Is the check result normal?
Go to Step 11.
Repair the damaged connector.

STEP 11. Measure the voltage at the C-408 ETACS-ECU connector.
(1)Disconnect the C-408 ETACS-ECU connector, and measure the voltage at the wiring harness-side connector.
(2)Measure the voltage between C-408 ETACS-ECU connector terminal No. 1 and body earth.
OK: System voltage

Q. Is the check result normal?
Go to Step 13.
Go to Step 12.

STEP 12. Check the wiring harness between C-408 ETACS-ECU connector terminal No. 2 and fusible link (38).

  • Check the power supply line for open circuit.

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 .)
Repair the wiring harness.

STEP 13. 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.