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

[54D] SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR <Except for Hong Kong spec.> - - SYMPTOM PROCEDURES - FLASHER TIMER - INSPECTION PROCEDURE M-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 M-1 "The turn-signal lamps do not illuminate

Step 2. Check the power supply circuit.

When the ignition switch is at the LOCK (OFF) position, check that the functions below work normally.

Ignition key reminder buzzer function <Vehicles for GCC only>

Light reminder function

Central door locking system

Room lamp (excluding interior lamp automatic shutdown function)

Q: Is the check result normal?

YES: Go to Step 3

.
NO: Refer to Inspection Procedure A-2 "Check the ETACS-ECU battery power supply circuit

Step 3. Pulse check

Check the input signal from the hazard warning lamp switch.

System switch	Check condition
Hazard warning lamp switch	When the hazard warning lamp switch is turned from off to on

OK: The MUT-II/III sounds or the voltmeter needle fluctuates.

Q: Is the check result normal?

The signal is received normally.: Go to Step 4

.
The hazard warning lamp switch signal is not received.: Refer to Inspection Procedure P-11 "The hazard warning lamp switch signal is not received

Step 4. 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.

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

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