INSPECTION PROCEDURE E-2: Keyless entry hazard warning lamp answerback function or the room lamp answerback function does not work normally.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

If the hazard warning lamp and the room lamp work normally, the ETACS-ECU may be defective.
Alternatively, it is possible that the keyless entry hazard warning lamp answerback function was disabled by the adjustment function.

POSSIBLE CAUSES

Defective turn-signal lamp

Malfunction of the room lamp

Malfunction of the ETACS-ECU

Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the adjustment function.

Check that the keyless entry hazard warning lamp answerback function has been enabled by using the adjustment function.

Q: Is the check result normal?

YES: Go to Step 2

.
NO: Enable the keyless entry hazard warning lamp answerback function by using the adjustment function. (Refer to GROUP 54B - Adjustment function

Step 2. Check the operation of the hazard warning lamp.

Check that the hazard warning lamps illuminate normally.

Q: Is the check result normal?

YES: Go to Step 3

.
NO: Refer to Inspection Procedure M-2 "The hazard warning lamps do not illuminate

Step 3. Check the operation of the room lamps.

Check that the room lamps illuminate normally.

Q: Is the check result normal?

YES: Go to Step 4

.
NO: Refer to Inspection Procedure O-2 "The front or rear room lamp does not illuminate/extinguish

Step 4. ECU check by using the SWS monitor

Check that the power supply and earth lines to the ETACS-ECU and the SWS communication lines are normal.

Ignition switch: OFF

ECU TO BE CHECKED

ETACS ECU

OK: "OK" is displayed on the "ETACS ECU" menu.

Q: Is the check result normal?

YES: Go to Step 5

.
NO: Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible

Step 5. Retest the system.

Check that the keyless entry hazard warning lamp answerback function or the room lamp answerback function work normally.

Q: Is the check result normal?

YES: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction

).
NO: Replace the ETACS-ECU.



INSPECTION PROCEDURE E-2: Keyless entry hazard warning lamp answerback function or the room lamp answerback function does not work normally.

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

	COMMENTS ON TROUBLE SYMPTOM If the hazard warning lamp and the room lamp work normally, the ETACS-ECU may be defective. Alternatively, it is possible that the keyless entry hazard warning lamp answerback function was disabled by the adjustment function.
	POSSIBLE CAUSES Defective turn-signal lamp Malfunction of the room lamp Malfunction of the ETACS-ECU Damaged harness wires and connectors
	DIAGNOSIS PROCEDURE

	Step 1. Check the adjustment function. Check that the keyless entry hazard warning lamp answerback function has been enabled by using the adjustment function. Q: Is the check result normal? YES: Go to Step 2 . NO: Enable the keyless entry hazard warning lamp answerback function by using the adjustment function. (Refer to GROUP 54B - Adjustment function .)
	Step 2. Check the operation of the hazard warning lamp. Check that the hazard warning lamps illuminate normally. Q: Is the check result normal? YES: Go to Step 3 . NO: Refer to Inspection Procedure M-2 "The hazard warning lamps do not illuminate ".
	Step 3. Check the operation of the room lamps. Check that the room lamps illuminate normally. Q: Is the check result normal? YES: Go to Step 4 . NO: Refer to Inspection Procedure O-2 "The front or rear room lamp does not illuminate/extinguish ."
	Step 4. ECU check by using the SWS monitor Check that the power supply and earth lines to the ETACS-ECU and the SWS communication lines are normal. Ignition switch: OFF ECU TO BE CHECKED ETACS ECU OK: "OK" is displayed on the "ETACS ECU" menu. Q: Is the check result normal? YES: Go to Step 5 . NO: Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible ."
	Step 5. Retest the system. Check that the keyless entry hazard warning lamp answerback function or the room lamp answerback function work normally. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ). NO: Replace the ETACS-ECU.