DTC C1365-54: Accumulator Pressure Sensor Malfunction [06/2015 - ]: Description

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.	Detection Item	INF Code	DTC Detection Condition	Trouble Area	Note
C1365/54	Accumulator Pressure Sensor Malfunction	331 332 333 334	INF Code: 331 Sensor supply voltage (VACC) is 4.54 V or less, or 5.46 V or more for 0.8 seconds or more. INF Code: 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). INF Code: 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. INF Code: 334 At a vehicle speed of 6 km/h (4 mph) or more and accumulator pressure sensor output value of 19.7 MPa (200.8 kgf/cm² , 2857 psi) or less, the pump motor does not operate for 12 seconds or more.	Brake booster with master cylinder assembly	Electronically controlled brake system DTC

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1365/54

Accumulator Pressure Sensor Malfunction

331
332
333
334

INF Code: 331
- Sensor supply voltage (VACC) is 4.54 V or less, or 5.46 V or more for 0.8 seconds or more.

INF Code: 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).

INF Code: 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.

INF Code: 334
- At a vehicle speed of 6 km/h (4 mph) or more and accumulator pressure sensor output value of 19.7 MPa (200.8 kgf/cm² , 2857 psi) or less, the pump motor does not operate for 12 seconds or more.

Brake booster with master cylinder assembly

Electronically controlled brake system DTC