Inspection Procedure 6

Inspection Procedure 6: Keyless entry hazard light answerback function, the dome light answerback function or the horn answerback function does not work normally.

CAUTION:
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.

TECHNICAL DESCRIPTION (COMMENT)

If the hazard warning light and the dome light works normally, ETACS-ECU may be faulty.
Also, the answerback function may have been disabled using the customization function.

TROUBLESHOOTING HINTS

- The turn signal lights may be defective
- The dome light may be defective
- The horn may be defective
- The ETACS-ECU may be defective
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

STEP 1. Verify the operation hazard warning light.

Check that the hazard warning light illuminate normally.

Q. Is the check result normal?

YES Go to Step 2.
NO Inspection Procedure 1."
STEP 2. Verify the operation of the dome light.

Check that the dome lights illuminate normally.

Q. Is the check result normal?

YES Go to Step 3.
NO Inspection Procedure 1." or inspection procedure 2 "The rear dome light does not illuminate normally Inspection Procedure 2 [Vehicles Without Sunroof]."
STEP 3. Verify the horn.

Check that the horn normally.

Q. Is the check result normal?

YES Go to Step 4.
NO Replace the horn Service and Repair).
STEP 4. Check the operation of the keyless entry system.

Operate the transmitter and check that all doors lock and unlock.

Q. Is the check result normal?

YES Go to Step 5.
NO Refer to inspection procedure 5: "Keyless entry system does not work Inspection Procedure 5."
STEP 5. Check the customize function (Hazard light answerback).

Check that any one of the followings other than "Lock: 0, Unlock: 0" is set for "Hazard answerback" with a customization 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?

YES Go to Step 6.
NO Set "Hazard answerback" to any one other than "Lock: 0, Unlock: 0" with a customization function (Refer to Configuration Function).
STEP 6. Check the customize function (Horn answerback).

Check that any one of the followings other than "Not sound horn" is set for "Horn chirp by keyless" with a customization function.

- Lock any time
- W lock any time

Q. Is the check result normal?

YES Go to Step 7.
NO Set "Horn chirp by keyless" to any one other than "Not sound horn" with a customization function (Refer to Configuration Function).
STEP 7. Check of the troubles

Check if the keyless entry answerback function works normally.

Q. Is the check result normal?

YES Intermittent malfunction How to Cope With Intermittent Malfunctions).
NO Replace ETACS-ECU.