General Information

ABS/ESC
C1800 CAN time-out AHB - General Information

Component Location





General Description

AHB(active hydraulic booster) is boosting system using hydraulic pressure.
In case of vehicle applied AHB, it needs back up boosting system when AHB malfunctions because there is no booster using vaccumn pressure.
ESC takes this function by using CAN signal from AHB. If AHB malfunction signal detected, ESC makes braking pressure close to braking pressure driver have requested by putting pressure on all wheel by operating ESC motor.

DTC Description

The HECU checks the CAN communcation lines for the normal ESC control, and sets this code if an AHB message is not received within 500ms.

DTC Detecting Condition





Diagnostic Circuit Diagram