Step 1. ECU check by using 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 2.
NO:  Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible ."

Step 2. SWS monitor data list

Check the input signals below, which are related to the front and rear room lamps.

<Selected item> ETACS ECU

• Ignition switch: OFF

Item No.	Item name	Normal condition
Item 30	IG SW(IG1)	OFF

OK: Normal condition is displayed.

Q: Is the check result normal?

YES:  Go to Step 3.
NO:  Refer to Inspection Procedure P-2 "The ignition switch (IG1) signal is not received ."

Step 3. Pulse check

Check the input signals below, which are related to the front or rear room lamps.

System switch	Check condition
Key reminder switch	When the inserted ignition key is pulled out
All of the door switches	A door is opened when all the doors are closed
Driver's door lock actuator switch	When the driver's door is unlocked or locked

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 key reminder switch signal is not received.:  Refer to Inspection Procedure P-12 "The key reminder switch signal is not received ."
All the door switch signals are not received.:  Refer to Inspection Procedure P-4 "All the door switch signals are not received <LH drive vehicles>." Refer to Inspection Procedure P-4 "All the door switch signals are not received <RH drive vehicles>."
The driver's door lock actuator switch signal is not received.:  Refer to Inspection Procedure P-15 "The driver's door lock actuator switch signal is not received <LH drive vehicles>." Refer to Inspection Procedure P-15 "The driver's door lock actuator switch signal is not received <RH drive vehicles>."

Step 4. Connector check: D-05 front room lamp connector, D-11 rear room lamp connector

Q: Is the check result normal?

YES:  Go to Step 5.
NO:  Repair the defective connector.

Step 5. Check the bulbs of the front and rear room lamps.

Check the bulbs of the front and rear room lamps.

Q: Is the check result normal?

YES:  Go to Step 6.
NO:  Replace the front or rear room lamp bulb.

Step 6. Connector check: C-217 ETACS-ECU connector

Q: Is the check result normal?

YES:  Go to Step 7.
NO:  Repair the defective connector.

Step 7. 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 8.
NO:  Repair the wiring harness.

Step 8. 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 9.
NO:  Repair the wiring harness.

Step 9. 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.