[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - ROOM LAMP - INSPECTION PROCEDURE N-1: The front and rear room lamp does not illuminate or extinguish normally. | PRINT PAGE / INDEX / PRIOR / NEXT

ROOM LAMP

INSPECTION PROCEDURE N-1: The front and rear room lamp does not illuminate or extinguish 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) Key reminder switch All of the door switches Driver's door lock actuator INTERIOR LAMP LOADED SIGNAL If this function does not work normally, these input signal circuit(s), the interior lamp automatic shutdown function or the ETACS-ECU may be defective. The delay-off setting of this function can be changed by the customize function (default setting; 15 seconds).
| POSSIBLE CAUSES Malfunction of the key reminder switch Malfunction of the door switches Malfunction of the driver's door lock actuator 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 LMP TN OFF" 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 set the "RM LMP TN OFF" 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 front and rear dome lamps. <Selected item> ETACS Ignition switch: OFF Open any door when all the doors are closed.
Item No. | Item name | Normal conditions
--- | --- | ---
Item 30 | IG SW (IG1) | OFF
Item 38 | THEFT-ALARM | from OFF to 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.38.: Refer to inspection procedure P-13 "All the door switch signals are not received" .
| Step 4. Check the ETACS SW data by using the SWS monitor. Check the ETACS-ECU signals which are related to the front and rear dome lamps. Ignition switch: OFF (key inserted) Driver's door lock: From locked to unlocked
Item No. | Item name | Normal conditions
--- | --- | ---
Item 03 | KEY REMIN SW | OFF
Item 21 | DR DOR LCK SW | from ON to OFF
OK: Normal condition is displayed. Q: Are the check result normal? Normal conditions are displayed for all the items.: Go to Step 5. Normal condition is not displayed for item No.03.: Refer to inspection procedure P-10 "The key reminder switch signal is not received" . Normal condition is not displayed for item No.21.: Refer to inspection procedure P-14 "The driver's door lock actuator switch signal is not received" .
| Step 5. Pulse check Check the input signals below, which are related to the front and rear dome lamps.
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 6. NO: Refer to inspection procedure P-17 "Interior lamp loaded signal is not detected" .
| Step 6. Connector check: D-05 front room lamp connector, D-11 rear room lamp connector Q: Is the check result normal? YES: Go to Step 7. NO: Repair the defective connector.
| Step 7. Check the bulbs of the front and rear dome lamps. Check the bulbs of the front and rear dome lamps. Q: Is the check result normal? YES: Go to Step 8. NO: Replace the front or rear room lamp bulb.
| Step 8. Connector check: C-217 ETACS-ECU connector Q: Is the check result normal? YES: Go to Step 9. NO: Repair the defective connector.
| Step 9. Check the wiring harness from C-217 ETACS-ECU connector terminal Nos. 5 and 6 to D-05 front room lamp connector terminal Nos. 2 and 1. NOTE: Prior to the wiring harness inspection, check junction block connector C-210, and repair if necessary. Q: Is the check result normal? YES: Go to Step 10. NO: Repair the wiring harness.
| Step 10. Check the wiring harness from C-217 ETACS-ECU connector terminal Nos. 5 and 6 to D-11 rear room lamp connector terminal Nos. 2 and 1. NOTE: Prior to the wiring harness inspection, check junction block connector C-210, and repair if necessary. Q: Is the check result normal? YES: Go to Step 11. NO: Repair the wiring harness.
| Step 11. Retest the system. Check that the front or rear room lamp illuminates and extinguishes 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-1: The front and rear room lamp does not illuminate or extinguish normally. | PRINT PAGE / INDEX / PRIOR / NEXT

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