C1604

DESCRIPTION
The HECU always monitors the solenoid valve drive circuit. It determines that there is an open or short-circuit in the solenoid coil or in a harness even if no current flows in the solenoid or through the HECU.

DTC DETECTING CONDITION





FAIL-SAFE FUNCTION
System down. both the ABS, (TCS) and the EBD function are inhibited and the ABS, (TCS) and the EBD warning lamps is activated. In this failure, the valve relay and all solenoids are prevented from being switched on.

INSPECTION PROCEDURES