General Information

Smart Key Unit
B1625 EMS Communication Data Failure - General Information

Component Inspection




1. Smartkey Module
2. ECM/PCM

General Description

SMK unit communicates with ECM/PCM through the serial communication line. If ECM/PCM requests authentication from SMK unit after IG ON, SMK unit check authentication with transponder then, sends this signal to ECM/PCM whether authentication is O.K or not.

DTC Description

Smartkey Module sets DTC B1625 if Data from ECM/PCM is error such as check sum error, Data Frame error, ID Unknown error, Data length error and Time out error.

DTC Detecting Condition





Diagnostic Circuit Diagram