Signals from Transmitter Switches are not Received.

caution Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.


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.


  • Battery discharged in the transmitter
  • Malfunction of the transmitter
  • Malfunction of WCM


STEP 1. M.U.T.-III diagnosis code

Check whether the WCM-related diagnosis code is set.

Q. Is the diagnosis code set?

Refer to .
Go to Step 2.

STEP 2. Transmitter battery check

Check the transmitter battery. Refer to .

Q. Is the check result normal?

Go to Step 3.
Replace the transmitter battery.

STEP 3. Register the keyless entry secret code using a known-normal transmitter of the same type again, and check the trouble symptom.

(1)Register a known-normal transmitter of the same type.
(2)Check if the signals from the transmitter switches are received.

Q. Is the check result normal?

Replace the original transmitter with a new one.
Replace the WCM (Including when the new transmitter cannot be registered). Replace WCM and register the ID codes (Refer to ).