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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 65 (Automatic Transaxle System Diagnosis (HEV)) >> DTC U0100: Lost Communication With ECM/PCM 'A' (C-CAN) >> General Information >> General Description

General Information: General Description

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Several control units are applied to electronically controlled vehicles. These units perform each control with information from various sensors. Thus, sharing signal information from sensors is needed, so CAN communication type whose communication speed is high and insensitive to electrical noise by spark generation is adopted to controlling powertrain (PCM (ECM), TCM, ESP PCM (ECM), ABS PCM (ECM)).

As sharing signals of engine speed, APS, gear shifting, torque reduction in ESP and various modules, active control is performed.

Fig 1: Control Units Communication Diagram
G10603795Courtesy of HYUNDAI MOTOR AMERICA