INSPECTION PROCEDURE C-4: The ignition key reminder function does not work normally.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

If the key reminder function does not work normally, the input signal circuits below or the ETACS-ECU may be defective.

Key reminder switch

Driver's door switch

Driver's door lock actuator

POSSIBLE CAUSES

Malfunction of the key reminder switch

Malfunction of the driver's door switch

Malfunction of the driver's door lock actuator

Malfunction of the ETACS-ECU

Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

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

<Selected item> ETACS

Driver's door: open

Item No.	Item name	Normal condition
Item 32	DR DOOR SW^*1	ON
Item 32	FRONT DOOR SW^*2	ON

NOTE:

^*1 : Except for Australia

^*2 : Vehicles for Australia

OK: Normal condition is displayed.

Q: Is the check result normal?

YES: Go to Step 3

.
NO: 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 3. Pulse check

Check the input signals below which are related to the key reminder function.

System switch	Check condition
Key reminder switch	When the inserted ignition key is pulled out
Driver's door lock actuator switch	When the driver's key cylinder or inside lock knob 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

."
The driver's door lock actuator switch signal is not received.: Refer to Inspection Procedure P-15 "The driver's door lock actuator signal is not received <LH drive vehicles>

." Refer to Inspection Procedure P-15 "The driver's door lock actuator signal is not received <RH drive vehicles>

Step 4. Retest the system.

Q: Does the ignition key reminder function work normally?

YES: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction

).
NO: Replace the ETACS-ECU.