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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 92 (Smart Key Unit Diagnosis (HEV)) >> DTC B1625: ECM Communication Data Failure >> General Information >> General Description

General Information: General Description

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Smartkey Module communicates with PCM through the serial communication line. If PCM requests authetication from Smartkey Module after IG ON, Smartkey Module check authentication with transponder then, sends this signal to PCM whether authentication is okay or not.

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