General Information

Immobilizer
P1679 Immobilizer-EMS Data Fail (Data frame, CS, Message error) - General Information

Component Location





General Description

When the ID code from the transponder is verified by the ICU then the registering sequence is complete and a answer signal is sent to the EMS.
The ICU sends a START or NO START signal to the EMS.

DTC Description

The DTC will set, if the data checksum sent by EMS and ICU is different.

DTC Detecting Condition





Diagnostic Circuit Diagram










Signal Waveform & Data




Fig.1) A normal signal waveform of antenna and immobilizer communication when IG key(TP: Transponder) is OFF to ON.