DTC C1257/57 IG Power Source: Description
WARNING: This page is about a different car, the 2008 Toyota FJ Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
The motor relay (semiconductor relay) is built into the hydraulic brake booster and drives the pump motor based on a signal from the skid control ECU.
DTC DETECTING CONDITIONS AND TROUBLE AREAS REFERENCE
| DTC No. | DTC Detecting Condition | Trouble Areas |
|---|---|---|
| C1257/57 | Open in pump motor input circuit |
|