[54B] SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - HEADLAMP AND TAIL LAMP - Inspection Procedure K-6: The auto lamp function does not work normally. | PRINT PAGE / INDEX / PRIOR / NEXT

Inspection Procedure K-6: The auto lamp function does not work normally.
| CAUTION Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
| COMMENTS ON TROUBLE SYMPTOM If auto lamp function does not work normally, the above input signal circuit(s) or the ETACS-ECU may be defective.
| POSSIBLE CAUSES Malfunction of the ETACS-ECU Malfunction of the front-ECU Damaged harness wires and connectors
| DIAGNOSIS PROCEDURE
| Step 1. Check that the taillights and headlamps operate. Check that the tail lights and headlamps illuminate normally. Q: Is the check result normal? YES: Go to Step 2. NO: Check the taillights and the headlamps (Refer to trouble symptom chart ).
| Step 2. Pulse check Check the input signals below, which are related to the auto-lamp function.
System switch | Check condition
--- | ---
Ignition switch (IG1) | When turned from ACC to ON
Photo sensor | When the lighting in the vicinity of the sensor goes darker
Vehicle speed signal | When the vehicle speed has reached 10 km/h or more.
OK: The MUT-II/III sounds or the voltmeter needle fluctuates. Q: Are the check result normal? All the signals are received normally.: Go to Step 3. The ignition switch (IG1) signal is not received.: Refer to Inspection Procedure P-2 "The ignition switch (IG1) signal is not received ." The photo sensor signal is not received.: Refer to inspection procedure P-21 "No photo sensor signal is received ." The speed signal is not received.: Refer to Inspection Procedure P-15 "The vehicle speed signal is not received ."
| Step 3. Retest the system. Check that the auto lamp function works 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.> - - SYMPTOM PROCEDURES - HEADLAMP AND TAIL LAMP - Inspection Procedure K-6: The auto lamp function does not work normally. | PRINT PAGE / INDEX / PRIOR / NEXT

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