ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1365/54

DTC Code DTC Name
C1365/54 Accumulator Pressure Sensor Malfunction

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 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

WIRING DIAGRAM

Refer to DTC C1246/46.

Click here

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU assembly or brake actuator assembly, perform initialization and calibration of the linear solenoid valve.

Click here

PROCEDURE


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


    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

    2. Disconnect the A24 skid control ECU assembly connector.

    3. Disconnect the A16 brake actuator assembly connector.

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A24-28 (E) - A16-45 (E) Always Below 1 Ω
      A24-28 (E) or A16-45 (E) - Body ground Always 10 kΩ or higher
      A24-27 (VCM) - A16-35 (VCM) Always Below 1 Ω
      A24-27 (VCM) or A16-35 (VCM) - Body ground Always 10 kΩ or higher
      A24-26 (PAC1) - A16-46 (PAC1) Always Below 1 Ω
      A24-26 (PAC1) or A16-46 (PAC1) - Body ground Always 10 kΩ or higher
      A24-9 (PCK1) - A16-37 (PCK1) Always Below 1 Ω
      A24-9 (PCK1) or A16-37 (PCK1) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      A24-28 (E) - A16-14 (E) Always Below 1 Ω
      A24-28 (E) or A16-14 (E) - Body ground Always 10 kΩ or higher
      A24-27 (VCM) - A16-10 (VCM) Always Below 1 Ω
      A24-27 (VCM) or A16-10 (VCM) - Body ground Always 10 kΩ or higher
      A24-26 (PAC1) - A16-15 (PAC1) Always Below 1 Ω
      A24-26 (PAC1) or A16-15 (PAC1) - Body ground Always 10 kΩ or higher
      A24-9 (PCK1) - A16-12 (PCK1) Always Below 1 Ω
      A24-9 (PCK1) or A16-12 (PCK1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. RECONFIRM DTC


    1. Reconnect the A24 skid control ECU assembly connector.

    2. Reconnect the A16 brake actuator assembly connector.

    3. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    4. Turn the power switch off.

    5. Turn the power switch on (IG).

    6. Check if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTC C1365/54 is output. A
      DTC C1365/54 is not output. B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. CHECK FREEZE FRAME DATA


    1. Check the INF code from the Freeze Frame Data memorized when the DTC (C1365/54) is stored.

      Click here

      Result
      Result Proceed to
      INF code 211 is output. A
      INF codes 212, 214 and/or 215 are not output. B

    A

    REPLACE SKID CONTROL ECU ASSEMBLY for LHD: Click here
    REPLACE SKID CONTROL ECU ASSEMBLY for RHD: Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here