DTC C1365/54: Accumulator Pressure Sensor Malfunction [03/2017 - 09/2018]: Description

The accumulator pressure sensor is built into the brake actuator assembly.

The skid control ECU 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 ABS 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	211 212 214 215	INF Code: 211 Sensor supply voltage 1 (VCM) is 4.7 V or less, or 5.3 V or more for 0.05 seconds or more. INF Code: 212 Output voltage of accumulator pressure sensor (PAC1) is 0.25 V or less, or 4.53 V or more for 0.05 seconds or more. INF Code: 214 While the motor is off, the total of the wheel cylinder pressure sensor values of all 4 wheels increases but the accumulator pressure changes little for 0.5 seconds or more. INF Code: 215 Output voltage of accumulator pressure sensor (PAC1) is stuck at 4.53 V or less.	INF Code: 211 Open or short in accumulator pressure sensor power supply circuit Improperly connected connector, deformation or corrosion of terminals Accumulator pressure sensor Brake actuator assembly Skid control ECU assembly INF Code: 212, 214, 215 Open or short in accumulator pressure sensor power supply circuit Improperly connected connector, deformation or corrosion of terminals Brake actuator assembly Skid control ECU assembly	Electronically controlled brake system DTC

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1365/54

Accumulator Pressure Sensor Malfunction

211
212
214
215

INF Code: 211
- Sensor supply voltage 1 (VCM) is 4.7 V or less, or 5.3 V or more for 0.05 seconds or more.

INF Code: 212
- Output voltage of accumulator pressure sensor (PAC1) is 0.25 V or less, or 4.53 V or more for 0.05 seconds or more.

INF Code: 214
- While the motor is off, the total of the wheel cylinder pressure sensor values of all 4 wheels increases but the accumulator pressure changes little for 0.5 seconds or more.

INF Code: 215
- Output voltage of accumulator pressure sensor (PAC1) is stuck at 4.53 V or less.

INF Code: 211
- Open or short in accumulator pressure sensor power supply circuit
- Improperly connected connector, deformation or corrosion of terminals
- Accumulator pressure sensor
- Brake actuator assembly
- Skid control ECU assembly

INF Code: 212, 214, 215
- Open or short in accumulator pressure sensor power supply circuit
- Improperly connected connector, deformation or corrosion of terminals
- Brake actuator assembly
- Skid control ECU assembly

Electronically controlled brake system DTC

DTC No.	Brake warning light / yellow (minor malfunction) code	ABS warning light code	Slip indicator light code	Brake hold standby indicator light code
C1365	54	42	45	21