General Information

Component Location





General Description

Immobilizer is device that prevents car from being thieved by reproduced key. Major components of immobilizer are Transponder, PCM/ECM (Engine Control Module) and SMARTRA. Besides them, Immobilizer has transponder and coil antenna in it.
If driver inserts key into key hole, SMARTRA gets transponder signal by wireless communications run by Radio frequency of 125kHZ via coil antenna and converted into messages for serial communication by the SMARTRA device.
And the received messages from the EMS are converted into the RF signal, which is transmitted, to the transponder by antenna. The SMATRA executes the encryption algorithm and transmits the encryption result to PCM/ECM through K-line communication line.
And SMARTRA is in charge of relaying from EMS to Transponder. The SMARTRA is reached in key Learning process and stores the DPN (converted from PIN) in memory inside SMARTRA. This DPN (converted from PIN) is used in encryption algorithm between EMS and SMARTRA and to neutralize the SMARTRA. When SMARTRA is neutral, old DPN (converted from PIN) and SEK (generated from DPN) are deleted.

DTC Description

The PCM/ECM sets DTC P1610 if Non Immobilizer EMS is installed on vehicle equipped with Immobilizer.

DTC Detecting Condition





Schematic Diagram