DTC C1365/54: Accumulator Pressure Sensor Malfunction [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).
The skid control ECU (brake booster with master cylinder assembly) detects the accumulator pressure from the data sent from the accumulator pressure sensor, and then starts and stops the pump motor by operating the motor relay.
This DTC 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 |
|---|---|---|---|
| C1365/54 | 331 | Sensor supply voltage (VACC) is 4.54 V or less, or 5.46 V or more for 0.8 seconds or more. | Brake booster with master cylinder assembly |
| ↑ | 332 | Accumulator pressure sensor output voltage (PACC) is less than 8%, or 88% or more of sensor supply voltage for 0.8 seconds or more (less than 0.4 V, or 4.4 V or more for 0.8 seconds or more). | ↑ |
| ↑ | 333 | Fluctuation of sensor output is out of specification (the difference between the present value and last value is 7.5 MPa (77.0 kgf/cm2 , 1088 psi)) for 0.8 seconds or more. | ↑ |
| ↑ | 334 | With the vehicle driven at 6 km/h (4 mph) or more and output value of the accumulator pressure sensor 19.7 MPa (200.8 kgf/cm2 , 2857 psi) or less, the pump motor does not operate for 12 seconds or more. | ↑ |