General Information

Component Location





General Description

The HECU is composed of a ECU (Electronic Control Unit) and a HCU (Hydraulic Control Unit), HCU is composed of a source of hydraulic pressure and modulator valve block.
Increase and decrease of hydraulic pressure is operated by electronic motor, According to a detected signal by wheel speed sensor.
The hydraulic pressure which is needed for control is supplied by pump.
The HCU' function which is composed of a accumulator, return pump, solenoid valve is to increase, decrease or maintain the hydraulic pressure supplied to a wheel cylinder by operating return pump according to HECU control signal while ABS control.

DTC Description

The HECU monitors the operation of the IC components such as memory, register, A/D converter and so on.
The ECU sets this code when the EEPROM data read by the master processor is different than prior data written or when the master/slave processor detects abnormal operation in RAM, Status Register, Interrupt, Timer, A/D converter or cycle time.

DTC Detecting Condition