General Information

ESP (CTC)
C1604 ECU Hardware Error - General Information

Component Location





General Description

The HECU consists of an ECU (Electronic Control Unit) and a HCU (Hydraulic Control Unit). The HCU portion of the assembly contains a pump motor, solenoid valves, and accumulator. Raising and reducing the pressure of brake oil is completed by the electronic motor, according to a measured signal by wheel speed sensor. The function of HCU is to increase, decrease or maintain the hydraulic pressure supplied to a wheel cylinder by operating a return pump according to the control logic when the ESC control is active. The ECU monitors various sensors and switch inputs. These inputs are used to make decisions regarding HCU component operation.

DTC Description

The HECU monitors the operation of the IC components such as memory, register, A/D converter and so on.
If HECU can't write or erase data on the EEPROM or it is detected as an error in RAM etc., this DTC is set.

DTC Detecting Condition