General Information: General Description

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Communication between smart key PCM has 2 phase that is IG ON and Engine ON.

After this first IG ON transition phase or starting phase, a communication between Smart Key PCM and Engine PCM takes place.

IG ON Phase (FOB key or Fob Key in Fob holder)

Communication between Smart key PCM starts from wake-up signal from PCM.
After receiving wake-up signal from PCM, Smart Key PCM sends lock or unlock starting signal to PCM.

Starting Phase (FOB key or FOB key in Fob Holder)

In case driver tries to start engine, although Engine PCM is locked status for starting at IG ON, Engine PCM should send re-authentication to Smart Key PCM. According to the results of re-authentication, it would be decided to start engine or not.
The Engine PCM controls the engine, in a normal way for starting and running, and starts communication with the Smart Key PCM, sending a PIN request to the Smart Key PCM and waiting for valid release message from it until the release time period has ended.

In case of Smart Key PCM immobilizer function is locked, the Smart Key PCM answer is the no release message. Engine PCM enters in the locked state, which causes the activation of the immobilization actions of the engine.

In case of Smart Key PCM immobilizer function state is released, the Smart Key PCM answer is the release message, including the information Smart Key PCM inlearnt mode and the PIN code.