General Information

C1604 ECU (Brake System) Hardware error

General Information

Component Location





General Description

The HECU is composed of a ECU (Electronic Control Unit) and a HCU (Hydraulic Control Unit) , so the HECU hardware includes all solenoid valves inside the unit as well as the ECU.

DTC Description

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

DTC Detecting Condition





Diagnostic Circuit Diagram