DTC 51

Inspection Procedure: Code No.51 Valve Relay System:

COMMENT: When the ignition switch is turned "ON," the ABS-ECU switches the valve relay "OFF" and "ON" for an initial check, compares the voltage of the signal to the valve relay and valve power monitor line voltage to check whether the valve relay operation is normal. In addition, normally it monitors whether or not there is power in the valve power monitor line since the valve relay is normally "ON." If the supply of power to the valve power monitor line is interrupted, this Diagnostic Trouble Code (DTC) will be output.

PROBABLE CAUSE:
- Malfunction of ABS valve relay.
- Malfunction of wiring harness (short circuit).
- Malfunction of ABS-ECU.
- Malfunction of hydraulic unit.