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

ECU 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. Pulse check

Check the input signals below which are related to the keyless entry system.

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 key cylinder or inside lock knob is unlocked or locked
Keyless entry transmitter switch	When the switch is turned from off to on

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 3.
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-14 "All the door switch signals are not received <LH drive vehicles>." Refer to Inspection Procedure P-14 "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 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>."
The keyless entry transmitter switch signal is not received.:  Refer to Inspection Procedure P-17 "Each switch signal of the keyless entry transmitter is not received ."

Step 3. Retest the system.

Check the keyless entry system works 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.