P1623

DTC P1623: Unregistered Transponder

Detecting Condition and Trouble Area






Troubleshooting

1. Diagnostic Trouble Code (DTC) confirmation

Clear DTC(s) referring to DTC Clearance DTC Clearance.
Turn the ignition switch to OFF position.
Check if any DTC is detected referring to DTC Check DTC Check.

Is DTC P1623 still detected?
YES -
Go to Step 2.
NO -
The troubleshooting is completed.

2. Diagnostic Trouble Code (DTC) check

Is any DTC other than P1623 is detected in Step 1?
YES -
Perform the troubleshooting referring to the corresponding flowchart, and then go to Step 3.
NO -
Go to Step 3.

3. Registration of the unregistered ignition key with ECM and Diagnostic Trouble Code (DTC) check

Register the transponder code in the transponder in the unregistered ignition key with ECM referring to Registration of the Ignition Key Registration of the Ignition Key.
Check if that DTC P1623 is detected referring to DTC Check DTC Check.

Is DTC P1623 detected?
YES -
Go to Step 4.
NO -
The troubleshooting is completed.

4. ICM check

Check ICM referring to Testing and Inspection Inspection of Immobilizer Control Module (ICM) and Its Circuit.

Is immobilizer controller assembly normal?
YES -
Replace ECM with new one referring to ECM (Engine Control Module) Removal and Installation ECM (Engine Control Module) Removal and Installation
, and then perform Procedure after ECM Replacement Procedure after ECM Replacement.
NO -
Replace ICM with new one referring to Service and Repair Immobilizer Control Module (ICM) Removal and Installation.