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System Description

The vehicle is equipped with an immobilizer system that will disable the vehicle unless a programmed ignition key is used.

This system consists of a transponder, an immobilizer control unit-receiver, immobilizer indicator, imoes unit ('07-08 Canada models, '08 USA models), and the PCM.

'07 USA models: When the immobilizer key (programmed by the HDS) is inserted into the ignition switch and turned to the ON (II) position, the immobilizer control unit-receiver sends power to the transponder in the ignition key. The transponder then sends a coded signal back to the immobilizer control unit-receiver which then sends a coded signal to the PCM to supply power to the fuel pump circuit.

'07-08 Canada models, '08 USA models: When the immobilizer key is inserted into the ignition switch and turned to the ON (II) position, the immobilizer control unit-receiver sends power to the transponder in the ignition key. The transponder then sends a coded signal back to the immobilizer control unit-receiver which sends a coded signal to the imoes unit, which confirms the code and signals the PCM to supply power to the fuel pump circuit. A handshake with the HDS is required at PCM or imoes unit repair or replacement, and all keys are required at immobilizer control unit-receiver repair or replacement.

Fig 1: Immobilizer System Diagram
G05593111Courtesy of AMERICAN HONDA MOTOR CO., INC.