Inspection Procedure 6

Inspection Procedure 6: The dome light, the turn-signal lights and the horn do not operate through the answer back function.

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

COMMENTS ON TROUBLE SYMPTOM
If the hazard warning light, the dome light and the horn work normally, ETACS-ECU may be faulty. Also, the answer back function may have been disabled using the customization function.

PROBABLE CAUSES
- Malfunction of the turn signal light
- Malfunction of the dome light
- Malfunction of the horn
- Malfunction of ETACS-ECU
- Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

STEP 1. Verify the hazard warning lights.
Check that the hazard warning lights illuminate normally.

Q: Is the check result normal?

YES : Go to Step 2.

NO : Refer to Chassis Electrical, Inspection Procedure 1: The Hazard Warning lights do not Illuminate.

STEP 2. Verify the dome light.
Check that the dome light illuminate normally.

Q: Is the check result normal?

YES : Go to Step 3.

NO : Refer to Chassis Electrical, Trouble Symptom Chart.

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 (Refer to Chassis Electrical, Horn).

STEP 4. Check the operation of the keyless entry system.
Operate the transmitter and check that all doors (including the liftgate) lock and unlock.

Q: Is the check result normal?

YES : Go to Step 5.

NO : Refer to Inspection Procedure 1.

STEP 5. Check the customize function.
Check that any one of the followings other than "Lock: 0, Unlock: 0" is set for "Hazard answer back" 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 answer back" to any one other than "Lock: 0, Unlock: 0" with a customization function. Configuration Function

STEP 6. Check the customize function.
Check that any one of the followings other than "Not sound horn" is set for "Horn chirp by RKE" 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 RKE" to any one other than "Not sound horn" with a customization function. Configuration Function

STEP 7. Check of the troubles.
Check if the keyless entry answer back function works normally.

Q: Is the check result normal?

YES : Intermittent malfunction (Refer to General (Body and Chassis), How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction).

NO : Replace ETACS-ECU.