Inspection Procedure 8: The hazard warning lamp switch signal is not received.
| caution | Whenever the ECU
is replaced, ensure that the input signal circuit is normal. |
COMMENTS ON TROUBLE SYMPTOM
- Keyless entry system (encrypted code registration)
- Hazard warning lamp switch
PROBABLE CAUSES
- Malfunction of the hazard warning lamp switch
- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Connector check: B-08 hazard warning switch connector
Q.
Is the check result normal?
STEP 2. Check the hazard warning switch.
Q.
Is the check result normal?
STEP 3. Resistance measurement at the B-08 hazard warning switch connector.
| (1)Disconnect the connector, and measure at the wiring harness side. |
| (2)Resistance between B-08 hazard warning lamp switch connector terminal No.2 and
body earth OK: Continuity exists (2 Ω or less) |
Q.
Is the check result normal?
STEP 4. Check the wiring harness between B-08 hazard warning switch connector (terminal 2) and the body earth.
- Check the earth wires for open circuit.
| note | Prior to the wiring harness inspection, check joint connector B-04 and earth connector
B-11, and repair if necessary. <LHD> |
| note | Prior to the wiring harness inspection, check earth connector B-11, and repair if necessary. <RHD> |
Q.
Is the check result normal?
STEP 5. Connector check: B-317 ETACS-ECU connector
Q.
Is the check result normal?
STEP 6. Check the wiring harness between B-317 ETACS-ECU connector (terminal 71) and B-08 hazard warning switch connector (terminal 1).
- Check the input line for open circuit or short circuit.
Q.
Is the check result normal?
STEP 7. M.U.T.-III data list
- Operate the hazard warning switch.
|
Q.
Is the check result normal?