INSPECTION PROCEDURE J-1: The ignition key cylinder illumination lamp does not illuminate/extinguish normally.

CAUTION

Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

OPERATION

The ETACS-ECU operates this function in accordance with the input signals below.

Ignition switch (IG1)

Key reminder switch

Driver's door switch

Ignition switch (ACC)

Ignition switch (IG1)

Key reminder switch

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), the ignition key cylinder illumination lamp or the ETACS-ECU may be defective.

POSSIBLE CAUSES

Malfunction of the key reminder switch

Malfunction of the driver's door switch

Malfunction of the ignition key cylinder illumination lamp

Malfunction of the ETACS-ECU

Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the operation of the room lamp.

Check that the dome lamps illuminate and extinguish normally.

Q: Is the check result normal?

YES: Go to Step 2

.
NO: Refer to inspection procedure N-1 "The front and rear room lamp does not illuminate or extinguish normally

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

<Selected item> ETACS

Ignition switch: OFF

Driver's door: open

Item No.	Item name	Normal conditions
Item 30	IG SW( IG1)	OFF
Item 32	DR DOOR SW	ON

OK: Normal conditions displayed for all the items

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.32.: Refer to inspection procedure P-4 "The driver's door switch signal is not received"

Step 4. Check the ETACS SW data by using the SWS monitor.

Check the ETACS-ECU communication signal, which is related to the ignition key cylinder illumination lamp.

Ignition switch: OFF (key inserted)

Item No.	Item name	Normal conditions
Item 03	KEY REMIN SW	OFF

OK: Normal condition is displayed.

Q: Is the check result normal?

YES: Go to Step 5

.
NO: Refer to inspection procedure P-10 "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.