[54D] SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR <Except for Hong Kong spec.> - - SYMPTOM PROCEDURES - HEADLAMP AND TAIL LAMP - INSPECTION PROCEDURE L-5: The headlamp automatic shutdown function does not work normally. <Except vehicles for Australia> | PRINT PAGE / INDEX / PRIOR / NEXT

INSPECTION PROCEDURE L-5: The headlamp automatic shutdown function does not work normally. <Except vehicles for Australia>
| CAUTION Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
| COMMENTS ON TROUBLE SYMPTOM The ETACS-ECU operates this function in accordance with the input signals below. Ignition switch (IG1) Driver's door switch Tail lamp switch Headlamp switch If this function does not work normally, these input signal circuit(s), the front-ECU or the ETACS-ECU may be defective. Note that this function can be disabled/enabled by the adjustment function (default setting; enabled).
| POSSIBLE CAUSES Malfunction of the driver's door switch Malfunction of the front-ECU Malfunction of the column switch Malfunction of the ETACS-ECU Damaged harness wires and connectors
| DIAGNOSIS PROCEDURE
| Step 1. Check the adjustment function. Check that the headlamp automatic shutdown function has been enabled by using the adjustment function. Q: Is the check result normal? YES: Go to Step 2. NO: Enable the headlamp automatic shutdown function by using the adjustment function. Refer to .
| Step 2. 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 3. NO: Repair the headlamps. Refer to trouble symptom chart .
| Step 3. Pulse check Check the input signals below, which are related to the headlamp automatic shutdown function.
System switch | Check condition
--- | ---
Ignition switch (IG1) | When turned from ACC to ON
Driver's door switch | When the driver's door is opened
Tail lamp switch | When the lighting switch is turned to the TAIL position
OK: The MUT-II/III sounds or the voltmeter needle fluctuates. Q: Is the check result normal? All the signals are received normally.: Go to Step 4. The ignition switch (IG1) signal is not received.: Refer to Inspection Procedure P-2 "The ignition switch (IG1) signal is not received ." The driver's door switch signal is not received.: Refer to Inspection Procedure P-4 "The driver's door switch signal is not received <LH drive vehicles>." Refer to Inspection Procedure P-4 "The driver's door switch signal is not received <RH drive vehicles>." The tail lamp switch signal is not received.: Refer to Inspection Procedure P-5 "The column switch (lighting and turn-signal lamp switch) signal is not received ."
| Step 4. Retest the system. Replace the ETACS-ECU, and then check that the headlamp automatic shutdown function works normally. Replace the ETACS-ECU. Check that the headlamp automatic shutdown 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 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-5: The headlamp automatic shutdown function does not work normally. <Except vehicles for Australia> | PRINT PAGE / INDEX / PRIOR / NEXT

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