[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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