DTC C0900: Device No. 1 Voltage High

DTC will set when vehicle speed is greater than 5 MPH and solenoid relay voltage is greater than 19 volts for .72 second. When DTC is set, ABS is disabled and ABS indicator light will illuminate. The Dynamic Rear Proportioning (DRP) will only have the hold function. Diagnose charging system for cause of overcharging.