[54B] SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR <Hong Kong spec.> - - INPUT SIGNAL PROCEDURES - INSPECTION PROCEDURE P-12: The hazard warning lamp switch signal is not received.PRINT PAGE / INDEX / PRIOR / NEXT
INSPECTION PROCEDURE P-12: 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
Input signal from the hazard warning lamp switch is used to operate the functions below. If the signal is abnormal, these functions will not work normally.
  • Keyless entry system (encrypted code registration)
  • Hazard warning lamp
POSSIBLE CAUSES
  • Malfunction of the hazard warning lamp switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Connector check: C-22 hazard warning lamp switch connector
Q: Is the check result normal?
YES:  Go to Step 2.
NO:  Repair the connector.
Step 2. Check the hazard warning lamp switch.
Refer to GROUP 54A - Hazard warning lamp switch .
Q: Is the check result normal?
YES:  Go to Step 3.
NO:  Replace the hazard warning lamp switch.
Step 3. Measure the resistance at the C-22 hazard warning lamp switch connector.
  1. Disconnect the connector, and measure at the wiring harness side.
  1. Turn the ignition switch to the ON position.
  1. Resistance between C-22 hazard warning lamp switch connector terminal No.2 and body earth
    2. OK: 2 Ω or less
Q: Is the check result normal?
YES:  Go to Step 5.
NO:  Go to Step 4.
Step 4. Check the wiring harness between C-22 hazard warning lamp switch connector terminal No.2 and the body earth.
  • Check the earth wires for open circuit.
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:  Repair the wiring harness.
Step 5. Connector check: C-219 ETACS-ECU connector
Q: Is the check result normal?
YES:  Go to Step 6.
NO:  Repair the connector.
Step 6. Check the wiring harness between C-219 ETACS-ECU connector terminal No.55 and C-22 hazard warning lamp switch connector terminal No.1.
  • Check the input line for open circuit.
Q: Is the check result normal?
YES:  Go to Step 7.
NO:  Repair the wiring harness.
Step 7. Retest the system.
Check that the hazard warning lamp switch signal is received 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.
[54B] SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR <Hong Kong spec.> - - INPUT SIGNAL PROCEDURES - INSPECTION PROCEDURE P-12: The hazard warning lamp switch signal is not received.PRINT PAGE / INDEX / PRIOR / NEXT
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