DTC C1256/56: Accumulator Low Pressure [08/2013 - ]: Description
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
The accumulator pressure sensor is built into the brake actuator (brake booster with master cylinder assembly) and detects the accumulator pressure.
The skid control ECU (brake booster with master cylinder assembly) turns on the brake warning light / red (malfunction) and brake warning light / yellow (minor malfunction), and sounds the meter buzzer if it senses a decrease in the accumulator pressure.
DTC C1256/56 may be stored if the accumulator pressure drops due to frequent braking (this is not a malfunction).
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1256/56 | 341 | Significant drop in accumulator pressure continues. (DTCs will be stored and the buzzer will operate when either condition is met.) |
|