INSPECTION PROCEDURE L-2: The hazard warning lamps do not illuminate.

[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - FLASHER TIMER - INSPECTION PROCEDURE L-2: The hazard warning lamps do not illuminate.

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CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

If the hazard warning lamps do not illuminate, the hazard warning lamp input signal circuit or the ETACS-ECU may be defective.

POSSIBLE CAUSES

Malfunction of the hazard warning lamp switch

Malfunction of the ETACS-ECU

Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check that the turn-signal lamps operate.

Check that the turn-signal lamps illuminate normally.

Q: Is the check result normal?

YES: Go to Step 2

.
NO: Refer to inspection procedure L-1 "The turn signal lamps do not illuminate

Step 2. Check the ETACS SW data by using the SWS monitor.

Check the ETACS-ECU signals which are related to the hazard warning lamps.

Hazard warning lamp switch: ON

Item No.	Item name	Normal conditions
Item 04	HAZARD LMP SW	ON

OK: Normal condition is displayed.

Q: Is the check result normal?

YES: Go to Step 3

.
NO: Refer to inspection procedure P-12 "The hazard warning lamp switch signal is not received"

Step 3. Retest the system.

Check that the hazard warning lamps illuminate.

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.

[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - FLASHER TIMER - INSPECTION PROCEDURE L-2: The hazard warning lamps do not illuminate.

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