Inspection Procedure 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. M.U.T.-III data list
Check the input signal from the transmitter.

  • Transmitter buttons: ON
note For how to register the keyless entry transmitter encrypted code, refer to .
Item No.
 Item name
 Normal condition
40
 Remote key lock counter
 Times
41
 Remote key unlock counter
 Times
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 2.
Go to Step 4.

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. Then perform the variant coding (Refer to GROUP 00, Precautions Before Service - How to Perform Variant Coding ).