DTC C1257/57: IG Power Source: Description
The motor relay (semiconductor relay) is built in the master cylinder solenoid and drives the pump motor based on a signal from the skid control ECU.
DTC DETECTION CONDITION TABLE
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1257/57 | Open in motor system circuit (motor input circuit). | Hydraulic brake booster pump motor circuit |