DTC Description

This trouble code is set when the solenoid valves or operating circuit are malfunctioning as well as the trouble of HECU. The HECU monitors the operation of the valves by checking the drive circuit of the solenoid valves, and then sets this code when the unexpected drain voltage is detected, and also sets this code when the HECU module itself is out of order. For example, when the EEPROM data read by master processor is different from the data sent before, or when the master/slave processor detects abnormal operation in RAM, Status Register, Interrupt. Timer, A/D converter, cycle time, the HECU sets this code.