VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C0226/21, C0236/22, C0246/23, C0256/24

DTC Code DTC Name
C0226/21 SFR Solenoid Circuit
C0236/22 SFL Solenoid Circuit
C0246/23 SRR Solenoid Circuit
C0256/24 SRL Solenoid Circuit

DESCRIPTION

These solenoids turn on when signals are received from the skid control ECU and control the pressure acting on the wheel cylinders to control the braking force.

DTC Code DTC Detection Condition Trouble Area

C0226/21

C0236/22

C0246/23

C0256/24

Any of the following is detected:


  1. Open or short in the solenoid circuit continues for 0.05 seconds or more.

  2. While outputting solenoid OFF, an open circuit continues for 0.05 seconds or more.

  3. While outputting solenoid OFF, current continues to be applied for 0.05 seconds or more.

  4. While outputting solenoid ON, overcurrent continues for 0.1 seconds or more.

  5. While outputting solenoid ON, an open circuit continues for 0.05 seconds or more.

  • Brake actuator assembly (Solenoid)

  • Solenoid circuit

  • Skid control ECU

WIRING DIAGRAM

A015ZBVE01

INSPECTION PROCEDURE

Note

When replacing the skid control ECU, perform zero point calibration and store system information Click here.

Tech Tips

When C0278/11 and/or C0279/12 is output together with C0226/21, C0236/22, C0246/23, and/or C0256/24, inspect and repair the trouble areas indicated by C0278/11 and/or C0279/12 first Click here.

PROCEDURE


  1. INSPECT BRAKE ACTUATOR ASSEMBLY


    1. A0162ULE07

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

    2. Disconnect the brake actuator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      31 (BS) - 9 (SFRR) Always

      4.0 to 4.6 Ω

      at 25°C (77°F)
      9 (SFRR) - Body ground Always 10 kΩ or higher
      31 (BS) - 10 (SFLR) Always

      4.0 to 4.6 Ω

      at 25°C (77°F)
      10 (SFLR) - Body ground Always 10 kΩ or higher
      31 (BS) - 11 (SRRR) Always

      4.0 to 4.6 Ω

      at 25°C (77°F)
      11 (SRRR) - Body ground Always 10 kΩ or higher
      31 (BS) - 12 (SRLR) Always

      4.0 to 4.6 Ω

      at 25°C (77°F)
      12 (SRLR) - Body ground Always 10 kΩ or higher
      33 (FRA+) - 34 (FRA-) Always

      4.8 to 5.4 Ω

      at 25°C (77°F)
      34 (FRA-) - Body ground Always 10 kΩ or higher
      35 (FLA+) - 36 (FLA-) Always

      4.8 to 5.4 Ω

      at 25°C (77°F)
      36 (FLA-) - Body ground Always 10 kΩ or higher
      4 (RRA+) - 5 (RRA-) Always

      4.8 to 5.4 Ω

      at 25°C (77°F)
      5 (RRA-) - Body ground Always 10 kΩ or higher
      6 (RLA+) - 8 (RLA-) Always

      4.8 to 5.4 Ω

      at 25°C (77°F)
      8 (RLA-) - Body ground Always 10 kΩ or higher

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    OK

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


    1. A015YVME01

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

    2. Disconnect the skid control ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A35*1, J98*2-1 (SFRR) - A13-9 (SFRR) Always Below 1 Ω
      A35*1, J98*2-1 (SFRR) - Body ground Always 10 kΩ or higher
      A35*1, J98*2-13 (SFLR) - A13-10 (SFLR) Always Below 1 Ω
      A35*1, J98*2-13 (SFLR) - Body ground Always 10 kΩ or higher
      A35*1, J98*2-12 (SRRR) - A13-11 (SRRR) Always Below 1 Ω
      A35*1, J98*2-12 (SRRR) - Body ground Always 10 kΩ or higher
      A35*1, J98*2-2 (SRLR) - A13-12 (SRLR) Always Below 1 Ω
      A35*1, J98*2-2 (SRLR) - Body ground Always 10 kΩ or higher
      J78-23 (FRA+) - A13-33 (FRA+) Always Below 1 Ω
      J78-23 (FRA+) - Body ground Always 10 kΩ or higher
      J78-10 (FRA-) - A13-34 (FRA-) Always Below 1 Ω
      J78-10 (FRA-) - Body ground Always 10 kΩ or higher
      J78-21 (FLA+) - A13-35 (FLA+) Always Below 1 Ω
      J78-21 (FLA+) - Body ground Always 10 kΩ or higher
      J78-8 (FLA-) - A13-36 (FLA-) Always Below 1 Ω
      J78-8 (FLA-) - Body ground Always 10 kΩ or higher
      J78-7 (RRA+) - A13-4 (RRA+) Always Below 1 Ω
      J78-7 (RRA+) - Body ground Always 10 kΩ or higher
      J78-20 (RRA-) - A13-5 (RRA-) Always Below 1 Ω
      J78-20 (RRA-) - Body ground Always 10 kΩ or higher
      J78-9 (RLA+) - A13-6 (RLA+) Always Below 1 Ω
      J78-9 (RLA+) - Body ground Always 10 kΩ or higher
      J78-22 (RLA-) - A13-8 (RLA-) Always Below 1 Ω
      J78-22 (RLA-) - Body ground Always 10 kΩ or higher

      *1: for LHD

      *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. RECONFIRM DTC


    1. Reconnect the skid control ECU connectors and the brake actuator connector.

    2. Clear the DTCs Click here.

    3. Start the engine.

    4. Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.

    5. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTCs (C0226/21, C0236/22, C0246/23, and C0256/24) are not output A
      DTCs (C0226/21, C0236/22, C0246/23, and/or C0256/24) are output B

      Tech Tips


      • If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU with the engine switch on (IG) and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.

      • If the normal system code is output (no trouble codes are output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU and/or brake actuator assembly. Make sure that no DTCs are output.

      • If any DTCs are output while jiggling a connector or wire harness of the skid control ECU and/or brake actuator assembly, inspect and repair the connector or wire harness.

      • It is suspected that the DTCs were output due to a bad connection of the connector terminal.


    B

    REPLACE SKID CONTROL ECU Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here