Introduction to Immobilizer System Diagnosis

INTRODUCTION TO IMMOBILIZER SYSTEM DIAGNOSIS

CAUTION:
- The encrypted code should always be re-registered when replacing the immobilizer-ECU.
- If the immobilizer-ECU has been replaced with a new part, the password (vehicle secret code) which has been stored in the immobilizer-ECU for each vehicle will be replaced by a new password (secret code) specified by the customer.

The immobilizer system consists of the immobilizer-ECU, PCM, ignition key and ignition key ring antenna. If the engine cannot be started by using a registered ignition key, one of these components may be defective. In addition, if the immobilizer system has immobilized the engine, MFI system DTC P1610 will be output. In this case, observe the immobilizer system troubleshooting. Then, if a malfunction is resolved, the MFI system DTC P1610 should not reset.