[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - HEADLAMP AND TAIL LAMP - INSPECTION PROCEDURE K-6: The headlamp automatic shutdown function does not work normally. | PRINT PAGE / INDEX / PRIOR / NEXT

INSPECTION PROCEDURE K-6: The headlamp automatic shutdown 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 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 customize function (default setting; enabled (D)).
| 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 SWS monitor customized function. Use the SWS monitor customize function to confirm that "H/L AUTO-CUT" is set to "W.FUNCTION(A)" or "W.FUNCTION(D)". Q: Is the check result normal? YES: Go to Step 2. NO: Use the SWS monitor customize function to set "H/L AUTO-CUT" to "W.FUNCTION(A)" or "W.FUNCTION(D)" (Refer to ).
| Step 2. ECU check on the SWS monitor Check that the power supply and earth lines to the column switch (column-ECU), the ETACS-ECU and the front-ECU and the SWS communication lines are normal. Ignition switch: OFF ECUS TO BE CHECKED COLUMN ECU ETACS ECU FRONT ECU OK: "OK" are displayed for all the items Q: Are the check result normal? "OK" are displayed for all the items: Go to Step 3. "NG" is displayed on the "COLUMN ECU" menu.: Refer to Inspection Procedure A-2 "Communication with the column switch (column-ECU) is not possible" . "NG" is displayed on the "ETACS ECU" menu.: Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible" . "NG" is displayed on the "FRONT ECU" menu.: Refer to Inspection Procedure A-4 "Communication with the front-ECU is not possible" .
| Step 3. Function diagnosis by using the SWS monitor Check the SWS communication signal, which are related to the headlamp automatic shutdown function. <Selected item> LIGHTING - HD AUTO-CUT Ignition switch: from ON to OFF Lighting switch: "TAIL" or "HEAD"
Item No. | Item name | Normal conditions
--- | --- | ---
Item 00 | HEADLAMP SW | ON when the lighting switch is at HEAD
Item 01 | TAIL LAMP SW | ON when the lighting switch is at TAIL
Item 30 | IG SW(IG1) | from ON to OFF
Driver's door: open
Item No. | Item name | Normal conditions
--- | --- | ---
Item 32 | DR DOOR SW | ON
Item 35 | HD AUTO-CUT | ON
OK: Normal conditions displayed for all the items Q: Are the check result normal? Normal conditions displayed for all the items: Go to Step 4. Normal condition is not displayed for item 00 or 01.: Refer to inspection procedure P-5 "The column switch (lighting and turn-signal lamp switch) signal is not received" . Normal condition is not displayed for item No.30.: Refer to inspection procedure P-2 "The ignition switch (IG1) signal is not received" . Normal condition is not displayed for item No.32.: Refer to inspection procedure P-4 "The driver's door switch signal is not received" . Normal condition is not displayed for item No.35.: Replace the front-ECU.
| Step 4. Retest the system. 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 ETACS-ECU.

[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - HEADLAMP AND TAIL LAMP - INSPECTION PROCEDURE K-6: The headlamp automatic shutdown function does not work normally. | PRINT PAGE / INDEX / PRIOR / NEXT

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