[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - ROOM LAMP - INSPECTION PROCEDURE N-2: Interior lamp automatic shutoff function does not work normally. | PRINT PAGE / INDEX / PRIOR / NEXT

INSPECTION PROCEDURE N-2: Interior lamp automatic shutoff 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 the interior lamp automatic shutdown function in accordance with the input signals below. Ignition switch (ACC) Ignition switch (IG1) Driver's door switch All of the door switches INTERIOR LAMP LOADED SIGNAL If this function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective. Note that this function can be disabled/enabled by the customize function (default setting; 30 minutes).
| POSSIBLE CAUSES Malfunction of the door switches Malfunction of the room lamp 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 "RM/L AUTO-CUT" is set to other than "W/O FUNCTION". Q: Is the check result normal? YES: Go to Step 2. NO: Use the SWS monitor customize function to se the "RM/L AUTO-CUT" to other than "W/O FUNCTION" (Refer to ).
| Step 2. ECU check on the SWS monitor Check that the power supply and earth lines to the ETACS-ECU and the SWS communication lines are normal. Ignition switch: OFF ECUS TO BE CHECKED ETACS ECU OK: "OK" is displayed on the "ETACS ECU" menu. Q: Is the check result normal? YES: Go to Step 3. NO: Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible" .
| Step 3. Confirm communication data by using the SWS monitor. Check the input signals below, which are related to the interior lamp automatic shutdown function. <Selected item> ETACS Ignition switch: OFF Driver's door: Open (close only when item No.38 is to be checked) All the doors: Open any door when all the doors are closed (close only when item No.32 is to be checked)
Item No. | Item name | Normal conditions
--- | --- | ---
Item 30 | IG SW(IG1) | OFF
Item 31 | IG SW(ACC) | OFF
Item 32 | DR DOOR SW | ON
Item 38 | THEFT-ALARM | OFF→ON
OK: Normal condition is displayed. Q: Are the check result normal? Normal conditions are displayed for all the items.: Go to Step 4. 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.31.: Refer to inspection procedure P-1 "The ignition switch (ACC) 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.38.: Refer to inspection procedure P-13 "All the door switch signals are not received" .
| Step 4. Pulse check Check the input signals below, which are related to the interior lamp automatic shutdown function.
System switch | Check conditions
--- | ---
INTERIOR LAMP LOADED SIGNAL | When a load is applied through multi-purpose fuse No.18
OK: The MUT-II/III sounds or the voltmeter needle fluctuates. Q: Is the check result normal? YES: Go to Step 5. NO: Refer to inspection procedure P-17 "Interior lamp loaded signal is not detected" .
| Step 5. Retest the system. Check that the interior lamp 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 - ROOM LAMP - INSPECTION PROCEDURE N-2: Interior lamp automatic shutoff function does not work normally. | PRINT PAGE / INDEX / PRIOR / NEXT

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