General Information

HEV Control System

U1003 Lost Communication with TCM (H-CAN) - General Information

Component Location





General Description

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 power-train & Chassis & HEV.

DTC Description

The HCU sets DTC U1003 if No message during 0.5s has not been received through the H-CAN signal.

DTC Detecting Condition





Diagnostic Circuit Diagram










Signal Waveform & Data