[54D] SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR <Except for Hong Kong spec.> - - SYMPTOM PROCEDURES - HEADLAMP AND TAIL LAMP - INSPECTION PROCEDURE L-4: The high-beam and low-beam headlamps do not illuminate when the passing switch is operated.PRINT PAGE / INDEX / PRIOR / NEXT
INSPECTION PROCEDURE L-4: The high-beam and low-beam headlamps do not illuminate when the passing switch is operated.
 CAUTION
 Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the low-beam and high-beam headlamps are normal, the passing switch input signal circuit or the front-ECU may be defective.
POSSIBLE CAUSES
  • Malfunction of the column switch
  • Malfunction of the front-ECU
  • Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Check that the headlamps operate.
Check that the low-beam and high-beam headlamps work normally.
Q: Is the check result normal?
YES:  Go to Step 2.
NO:  Repair the headlamps. Refer to trouble symptom chart .
Step 2. Pulse check
Check the input signal from the passing switch.
System switch
 Check condition
Passing lamp switch
 When the passing switch is turned from off to on

OK: The MUT-II/III sounds or the voltmeter needle fluctuates.
Q: Is the check result normal?
YES:  Go to Step 3.
NO:  Refer to Inspection Procedure P-5 "The column switch (lighting and turn-signal lamp switch) signal is not received ."
Step 3. Retest the system.
When the passing switch is turned on, check if the headlamps illuminate 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 front-ECU.
[54D] SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR <Except for Hong Kong spec.> - - SYMPTOM PROCEDURES - HEADLAMP AND TAIL LAMP - INSPECTION PROCEDURE L-4: The high-beam and low-beam headlamps do not illuminate when the passing switch is operated.PRINT PAGE / INDEX / PRIOR / NEXT
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