[54D] SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR <Except for Hong Kong spec.> - - INPUT SIGNAL PROCEDURES - INSPECTION PROCEDURE P-16: The front fog lamp switch signal is not received.PRINT PAGE / INDEX / PRIOR / NEXT
INSPECTION PROCEDURE P-16: The front fog 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 front fog lamp switch is used to operate the front fog lamps. If the signal is abnormal, the front fog lamps will not illuminate and extinguish normally.
POSSIBLE CAUSES
  • Malfunction of the fog lamp switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Connector check: C-03 fog lamp switch connector
Q: Is the check result normal?
YES:  Go to Step 2.
NO:  Repair the defective connector.
Step 2. Check the front fog lamp switch.
Refer to GROUP 54A - Front fog lamp .
Q: Is the check result normal?
YES:  Go to Step 3.
NO:  Replace the fog lamp switch.
Step 3. Measure the resistance at the C-03 fog lamp switch connector.
  1. Remove the fog lamp switch, and measure at the wiring harness side.
  1. Continuity between C-03 fog lamp switch connector terminal No.2 <LH drive vehicles> or 6 <RH drive vehicles or vehicles with rear fog lamps> and body earth
    2. OK: 2Ω or less
Q: Is the check result normal?
YES:  Go to Step 5.
NO:  Go to Step 4.
Step 4. Check the wiring harness from C-03 fog lamp switch connector terminal No.2 <LH drive vehicles> or 6 <RH drive vehicles or vehicles with rear fog lamps> to 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 defective connector.
Step 6. Check the wiring harness from C-219 ETACS-ECU connector No.54 to C-03 fog lamp switch connector terminal No.1 <LH drive vehicles> or 5 <RH drive vehicles or vehicles with rear fog lamps>.
  • 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 front fog 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.
[54D] SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR <Except for Hong Kong spec.> - - INPUT SIGNAL PROCEDURES - INSPECTION PROCEDURE P-16: The front fog lamp switch signal is not received.PRINT PAGE / INDEX / PRIOR / NEXT
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