Step 1. Check the operation of the room lamp.

Check that the room lamps illuminate and extinguish normally.

Q: Is the check result normal?

YES:  Go to Step 2.
NO:  Refer to Inspection Procedure O-1 "The front or rear room lamp does not illuminate or extinguish <vehicles without keyless entry system> ." Or refer to inspection procedure O-2 "The room lamp does not illuminate or extinguish <vehicles with keyless entry system> ."

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

Step 3. SWS monitor data list

Check the SWS communication signal, which are related to the ignition key cylinder illumination lamp.

<Selected item> ETACS ECU

• Ignition switch: OFF

• Driver's door: open

Item No.	Item name	Normal condition
Item 30	IG SW(IG1)	OFF
Item 32	DR DOOR SW*1	ON
	FRONT DOOR SW*2

NOTE: 

1. ^*1 : Except for Australia

2. ^*2 : Vehicles for Australia

OK: Normal conditions displayed for all the items

Q: Is the check result normal?

Normal conditions are displayed for all the items. <Vehicles without keyless entry system>:  Go to Step 4.
Normal conditions are displayed for all the items. <Vehicles with keyless entry system>:  Go to Step 5.
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 <LH drive vehicles>." Refer to Inspection Procedure P-4 "The driver's door switch signal is not received <RH drive vehicles>."

Step 4. Pulse check

Check the input signals below, which are related to the ignition key cylinder illumination lamp.

System switch	Check condition
Key reminder switch	When the inserted ignition key is pulled out

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-12 "The key reminder switch signal is not received ."

Step 5. Connector check: C-304 key reminder switch connector

Q: Is the check result normal?

YES:  Go to Step 6.
NO:  Repair the defective connector.

Step 6. Check the bulb of the ignition key cylinder illumination lamp.

Check the bulb of the ignition key cylinder illumination lamp.

Q: Is the check result normal?

YES:  Go to Step 7.
NO:  Replace the bulb of the ignition key cylinder illumination lamp.

Step 7. Connector check: C-219 ETACS-ECU connector

Q: Is the check result normal?

YES:  Go to Step 8.
NO:  Repair the defective connector.

Step 8. Check the wiring harness from C-219 ETACS-ECU connector (terminal Nos.69 and 71) to C-304 ignition key cylinder illumination lamp connector (terminal Nos.1 and 2).

• Check the input and output lines for open circuit.

Q: Is the check result normal?

YES:  Go to Step 9.
NO:  Repair the wiring harness.

Step 9. Retest the system.

Check that the ignition key cylinder illumination lamp illuminates/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.