General Information

Smart Key Code Saving
P1676 Immobilizer-Smartra Message Error - General Information

Component Location





General Description

1. The secret key code is porgrammed in memory of Smart Key ECM, 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 and ECM has 2 phase that is IG ON and Engine ON.
After this first IG ON transition phase or starting phase, a commnication 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 and ECM starts from wake-up signal from ECM.
2. After receiving wake-up signal from ECM, Smart Key ECM 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.
he 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 theactivation of the imobilization 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 inlearnt mode and the PIN code.

DTC Description

This DTC is set, after Engine ECM sends wake-up signal, if response signal from Smart key ECM is abnormal structure or is not valid message during engine ECM communication.

DTC Detecting Condition





Diagnostic Circuit