Electronically Controlled Brake System

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1365/54: Accumulator Pressure Sensor Malfunction

DTC C1365/54 - Accumulator Pressure Sensor Malfunction

DESCRIPTION

The accumulator pressure sensor is built into the brake actuator.
The skid control ECU detects the accumulator pressure based on the data sent from the accumulator pressure sensor, and then runs and stops the pump motor by operating the motor relay.
DTCs may be output if the accumulator pressure drops due to frequent braking (this is not a malfunction).






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE:
When replacing the skid control ECU or brake actuator assembly, perform initialization of linear solenoid valve and calibration Programming and Relearning.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU TO BRAKE ACTUATOR ASSEMBLY)




(a) Disconnect the skid control ECU and brake actuator assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Resistance:





(c) Measure the resistance according to the value(s) in the table below.
Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. RECONFIRM DTC
(a) Clear the DTC Electronically Controlled Brake System.
(b) Turn the engine switch on (IG).
(c) Check if the same DTC is recorded Electronically Controlled Brake System.
HINT: Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

Result:






B -- END
A -- Continue to next step.

3. CHECK FREEZE FRAME DATA
(a) Check the information code from the Freeze Frame Data memorized when the DTC (C1365/54) is stored Freeze Frame Data.
Result:






B -- REPLACE BRAKE ACTUATOR ASSEMBLY
A -- REPLACE SKID CONTROL ECU