DTC C1257/57 Power Supply Drive Circuit: Description
The motor relay (semiconductor relay) is built into the master cylinder solenoid and drives the pump motor based on a signal from the skid control ECU.
DTC DETECTION CONDITION AND TROUBLE AREA
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1257/57 | There is an open in the motor system circuit (motor input circuit). | Hydraulic brake booster pump motor circuit |