P1623

DTC P1623: Unregistered Transponder

Wiring Diagram

Refer to Immobilizer Control System Wiring Circuit Diagram Immobilizer Control System Wiring Circuit Diagram.

Detecting Condition and Trouble Area






Troubleshooting



1.
Was "Immobilizer Control System Check" performed?
YES
Go to Step 2.
NO
Go to Immobilizer Control System Check.

2. DTC check

Check if any DTC other than P1623 is detected referring to DTC Check DTC Check.

Is DTC other than P1623 detected?
YES
Go to applicable DTC troubleshooting.
NO
Go to Step 3.

3. Registration of unregistered ignition key with ECM

Register the unregistered ignition key with ECM referring to Registration of the Ignition Key Registration of the Ignition Key.

Was registration of ignition key completed?
YES
Recheck DTC.
NO
Go to Step 3.

4. Registration of the spare ignition key

Register the spare ignition key referring to Registration of the Ignition Key Registration of the Ignition Key.

Was registration of spare ignition key completed?
YES
Replace ignition key which cannot be registered.
NO
Substitute a known-good ECM and recheck.