P1676 Immobilizer-Smartra Message Error: General Description

1. The sequences of the PIN code storage are as follows.
   1. Input the PIN code into the scanner when key teaching process.

      he scanner transmits the Encrypted Code to the ECM after converting the PIN code into Encrypted Code.

   2. When the ECM gets the first key learning command, it transmits the SMARTRA3 learnt command and Encrypted Code to the SMARTRA3
   3. If the SMARTRA3 statue is virgin/neutral, the SMARTRA3 stores Encrypted Code in EEPROM and transmits the success message of the Encrypted Code storage.

      (If the SMARTRA3 is learnt, the SMARTRA3 compares Encrypted Code transmitted by the ECM with Encrypted Code stored in EEPROM and transmits the (in)correct Encrypted Code message to ECM)

   4. If the SMARTRA3 is learned normally or the Encrypted Code of the registered SMARTRA3 is the same as the ECM, the ECM begins operation the Transponder Learning.
   5. If the learning of the first transponder, the ECM stores the Encrypted Code in its EEPROM and converts state into learnt state.
2. The SMARTRA3 learning :
   1. starts with EMS request of PIN from scanner through the key teaching procedure.
   2. is possible in case that the status of SMARTAR is "virgin" or "neutral".
   3. In case that the SMARTRA3 is "learnt", the SMARTRA3 will transmits the information if PIN inputted from scanner is same as the PIN in SMARTRA3.
   4. is possible regardless of key status.
3. The sequence of the SMARTRA3 confirms are as follows.
   1. After communication with the SMARTRA3, the ECM transmits the random number with requirement of the TP ID information.
   2. The SMARTRA3 encrypts the random number and transmits the result (Encrypted Random Number) to the ECM with TP ID information.
   3. The ECM compares the result transmitted from the SMARTRA3 with the result calculated by ECM.

      And If result are coincided with each other; the ECS concludes the valid confirmation of the SMARTRA3.

1. The secret key code is programmed in memory of Smart Key ECM, ESCL, PDM, FOB key
2. The learnt FOB Key identifiers are stored in Smart Key ECM and PDM memory.
3. Corresponding PIN code is learnt and memorized in the Engine ECM

Communication between smart key ECM, integrated in IPM, and ECM 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 ECM and Engine ECM takes place.

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

1. Communication between Smart key ECM, integrated in IPM, and ECM starts from wake-up signal from ECM.
2. After receiving wake-up signal from ECM, Smart Key ECM, which is integrated in IPM, sends lock or unlock starting signal to ECM.

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

1. In case driver tries to start engine although Engine ECM is locked status for starting at IG ON, Engine ECM should send re-authentication to Smart Key ECM. According to the results of re-authentication, it would be decided to start engine or not.

   The Engine ECM controls the engine in a normal way for starting and running and starts communication with the Smart Key ECM, sending a PIN request to the Smart Key ECM and waiting for valid release message from it until the release time period has ended.

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

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