2018 / ECLIPSE CROSS / EC - Workshop Manual
54 -CHASSIS ELECTRICAL > 54A-CHASSIS ELECTRICAL > ETACS > INPUT SIGNAL PROCEDURES > THE HAZARD WARNING LAMP SWITCH SIGNAL IS NOT SENT TO THE ETACS-ECU.
Inspection Procedure 10: The hazard warning lamp switch signal is not received.
| caution | - Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
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COMMENTS ON TROUBLE SYMPTOM
The hazard warning lamp switch input signal is used for the operation judgement of hazard warning lamp. Therefore, if the signal is abnormal, the hazard warning lamp will not illuminate.
PROBABLE CAUSES
- Malfunction of hazard indicator assembly
- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Check the hazard indicator assembly.
STEP 2. Resistance measurement at hazard indicator assembly connector (earth terminal)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the hazard indicator assembly connector (earth terminal) and body earth.OK: Continuity exists (2 Ω or less)
Is the check result normal?
Go to Step 4.
Go to Step 3.
STEP 3. Check of open circuit in earth line between hazard indicator assembly connector and body earth
STEP 4. Check of short to power supply, short to earth, and open circuit in HAZ line between ETACS-ECU connector and hazard indicator assembly connector
Is the check result normal?
Go to Step 5. Repair the connector(s) or wiring harness.
STEP 5. M.U.T.-IIISE data list
Check the input signals from the hazard warning lamp switch.- Turn ON the hazard warning lamp switch.
| | | Item No. | Item name | Normal condition | | 89 | Hazard switch | ON |
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OK: Normal condition is displayed.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction 
). Replace the ETACS-ECU.
