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Home >> Kia >> 2012 >> Optima Hybrid >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Active Hydraulic Booster (AHB) System Diagnosis - HEV >> DTC C1807: Sub CAN bus off >> General Information >> General Description

General Information: General Description

The AHB ECU(Electronic Control Unit) has two CAN hardwares, first is used for power train CAN communication, second (sensor channel) is auxiliary CAN used for communication between AHB ECU and HECU. We call that as sub CAN bus. The sensor channel CAN hardware is installed in AHB ECU.