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

Step 2. Function diagnosis by using the SWS monitor

Check the SWS communication signals, which are related to the ignition key reminder function.

<Selected item> BUZZER - KEY REMND.ALM

• Ignition switch: OFF (key inserted)

• Driver's door: open

Item No.	Item name	Normal conditions
Item 30	IG SW(IG1)	OFF
Item 32	DR DOOR SW	ON
Item 43	BUZZER	ON

OK: Normal conditions are displayed for all the items.

Q: Are the check result normal?

Normal conditions are displayed for all the items.:  Go to Step 3.
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" .
Normal condition is not displayed for item No.43.:  Replace the ETACS-ECU.

Step 3. Check the ETACS SW data by using the SWS monitor.

Check the ETACS communication signals, which are related to the ignition key reminder function.

• 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 4.
NO:  Refer to inspection procedure P-10 "The key reminder switch signal is not received".

Step 4. Retest the system.

The ignition key reminder buzzer function should work 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.