Inspection Procedure A-3: Encrypted Code cannot be Registered.


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


COMMENTS ON TROUBLE SYMPTOM
If the encrypted code registration mode is not entered, the key reminder switch or the ETACS-ECU may be defective.
If the registration is not possible although the registration mode is entered, the keyless entry transmitter or the ETACS-ECU may be defective.

POSSIBLE CAUSES

  • Malfunction of the keyless entry transmitter
  • Malfunction of the key reminder switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the encrypted code registration mode.
Check that the encrypted code registration mode is entered.

Q. Is the check result normal?
Go to Step 3.
Go to Step 2.

STEP 2. 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
Key reminder switch
 When the inserted ignition key is pulled out
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Is the check result normal?
Go to Step 3.
The keyless entry transmitter button signal is not received. : Refer to .
The key reminder switch signal is not received. : Refer to .

STEP 3. Retest the system.
Check that the encrypted code can be registered.

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.