General Information

Component Location





General Description

The immobilizer system consists of a passive challenge-response (mutual authentication) transponder inside the key head, the encoded SMARTRA3 unit/key and the EMS can decode the secret code stored in the SMARTRA3. The EMS communicates the encoded messages to the SMARTRA3 via a dedicated communication line and confirms the key with the SMARTRA3.
The EMS carries out the immobilizer function, the SMATRA3 management and the key management. The immobilizer function is the unlocking of EMS only after detection of a valid ignition key/the SMATRA3 and the locking of EMS after switching off the engine.
The EMS related to immobilizer has the 3 kinds of software. At the first IGN on, the EMS concludes the software of each option (smart key, non-encoded SMARTRA3, encoded SMARTRA3) by communication. It is called "The auto detection for EMS".
The EMS keeps the previous option before being neutral when it is settled to each option.

DTC Description

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

DTC Detecting Condition