Inspection Procedure B-1: Each Button Signal of the Keyless Entry Transmitter is not Received.

caution

Whenever the ECU is replaced, ensure that the input signal circuit is normal.

COMMENTS ON TROUBLE SYMPTOM

Input signal from the keyless entry transmitter is used to operate the keyless entry system. If the signal is abnormal, the keyless entry system will not work normally.

PROBABLE CAUSES

Malfunction of the keyless entry transmitter
Defective battery of the keyless entry transmitter
Malfunction of the ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Pulse check

Check the input signals below which are related to the encrypted code of the keyless entry transmitter.

System switch	Check condition
Transmitter button	When the button is turned from off to on

OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Is the check result normal?

	Go to Step 4.

	Go to Step 2.

STEP 2. Check the transmitter battery.

Refer to

Q. Is the check result normal?

	Go to Step 3.

	Replace the keyless entry transmitter battery.

STEP 3. Register the encrypted code, and then retest the system.

(1)Register the keyless entry transmitter again.

(2)Check that each signal is received from the keyless entry transmitter.

Q. Is the check result normal?

	The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

	Replace the keyless entry transmitter.

STEP 4. Retest the system.

Check that each signal is received from the keyless entry transmitter.

Q. Is the check result normal?

	The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

	Replace the ETACS-ECU and register the ID codes (Refer to GROUP 54A, How to Register Encrypted Code ).