INSPECTION PROCEDURE 6: Keyless Entry Hazard Lamp Answerback Function or the Room Lamp Answerback Function does not Work Normally.



caution Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.


COMMENTS ON TROUBLE SYMPTOM


If the hazard warning lamp and the room lamp works normally, ETACS-ECU may be faulty. Also, the answerback function may have been disabled using the customisation function.

PROBABLE CAUSES



  • Malfunction of the turn signal lamps
  • Malfunction of the room lamp
  • Malfunction of ETACS-ECU
  • Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE


STEP 1. Check the operation hazard warning lamp


Check that the hazard warning lamp illuminate normally.

Q. Is the check result normal?

Go to Step 2.
Refer to GROUP 54A - inspection procedure 1: hazard warning lamp does not illuminate .

STEP 2. Check the operation of the room lamps.


Check that the room lamps illuminate normally.

Q. Is the check result normal?

Go to Step 3.
Refer to GROUP 54A - inspection procedure 1 "The front room lamp does not illuminate normally ." or inspection procedure 2 "The rear room lamp does not illuminate normally ."

STEP 3. Check the operation of the keyless entry system.


Operate the transmitter and check that all doors (including the tailgate) lock and unlock.

Q. Is the check result normal?

Go to Step 4.
Refer to .

STEP 4. Check the customise function.


Check that any one of the followings other than "Lock: 0, Unlock: 0" is set for "Hazard answer back" with a customisation function.

  • Lock:1, Unlock:2
  • Lock:1, Unlock:0
  • Lock:0, Unlock:2
  • Lock:2, Unlock:1
  • Lock:2, Unlock:0
  • Lock:0, Unlock:1

Q. Is the check result normal?

Go to Step 5.
Set "Hazard answer back" to any one other than "Lock: 0, Unlock: 0" with a customisation function (Refer to ).

STEP 5. Check of the troubles


Check if the keyless entry answerback function works 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.