ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C0226/21, C0236/22, C0246/23, C0256/24, C1227/27

DTC Code DTC Name
C0226/21 SFR Solenoid Circuit
C0236/22 SFL Solenoid Circuit
C0246/23 SRR Solenoid Circuit
C0256/24 SRL Solenoid Circuit
C1227/27 SRM 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

C1227/27

 When AST terminal voltage is 20 to 32 V, an open or short in the solenoid circuit continues for 0.05 seconds or more.

  • Brake actuator assembly

  • Solenoid circuit

  • Skid control ECU

WIRING DIAGRAM

A01CI30E01
A01CJ3EE01

INSPECTION PROCEDURE

Tech Tips

When C0278/11 and/or C0279/12 is output together with C0226/21, C0236/22, C0246/23, C0256/24, and/or C1227/27, inspect and repair the trouble areas indicated by C0278/11 and/or C0279/12 first Click here.

PROCEDURE


  1. INSPECT BRAKE ACTUATOR ASSEMBLY


    1. A01CJDQE01

      Disconnect the brake actuator connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      16 (BS) - 18 (SFRH) Always 31.7 to 35.7 Ω at 25°C (77°F)
      18 (SFRH) - Body ground Always 10 kΩ or higher
      16 (BS) - 6 (SFLH) Always 31.7 to 35.7 Ω at 25°C (77°F)
      6 (SFLH) - Body ground Always 10 kΩ or higher
      16 (BS) - 19 (SRRH) Always 31.7 to 35.7 Ω at 25°C (77°F)
      19 (SRRH) - Body ground Always 10 kΩ or higher
      16 (BS) - 22 (SRLH) Always 31.7 to 35.7 Ω at 25°C (77°F)
      22 (SRLH) - Body ground Always 10 kΩ or higher
      16 (BS) - 7 (SFRR) Always 15.9 to 17.9 Ω at 25°C (77°F)
      7 (SFRR) - Body ground Always 10 kΩ or higher
      16 (BS) - 12 (SFLR) Always 15.9 to 17.9 Ω at 25°C (77°F)
      12 (SFLR) - Body ground Always 10 kΩ or higher
      16 (BS) - 14 (SRRR) Always 15.9 to 17.9 Ω at 25°C (77°F)
      14 (SRRR) - Body ground Always 10 kΩ or higher
      16 (BS) - 15 (SRLR) Always 15.9 to 17.9 Ω at 25°C (77°F)
      15 (SRLR) - Body ground Always 10 kΩ or higher
      16 (BS) - 5 (SRM1) Always 20.5 to 23.5 Ω at 25°C (77°F)
      5 (SRM1) - Body ground Always 10 kΩ or higher
      16 (BS) - 23 (SRM2) Always 20.5 to 23.5 Ω at 25°C (77°F)
      23 (SRM2) - 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. A01CGVQE01

      Disconnect the skid control ECU connectors.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      S11-16 (SFRH) - S22-18 (SFRH) Always Below 1 Ω
      S11-16 (SFRH) - Body ground Always 10 kΩ or higher
      S11-8 (SFRR) - S22-7 (SFRR) Always Below 1 Ω
      S11-8 (SFRR) - Body ground Always 10 kΩ or higher
      S14-8 (SFLH) - S22-6 (SFLH) Always Below 1 Ω
      S14-8 (SFLH) - Body ground Always 10 kΩ or higher
      S14-9 (SFLR) - S22-12 (SFLR) Always Below 1 Ω
      S14-9 (SFLR) - Body ground Always 10 kΩ or higher
      S14-20 (SRRH) - S22-19 (SRRH) Always Below 1 Ω
      S14-20 (SRRH) - Body ground Always 10 kΩ or higher
      S14-30 (SRRR) - S22-14 (SRRR) Always Below 1 Ω
      S14-30 (SRRR) - Body ground Always 10 kΩ or higher
      S11-7 (SRLH) - S22-22 (SRLH) Always Below 1 Ω
      S11-7 (SRLH) - Body ground Always 10 kΩ or higher
      S11-1 (SRLR) - S22-15 (SRLR) Always Below 1 Ω
      S11-1 (SRLR) - Body ground Always 10 kΩ or higher
      S14-6 (SRM1) - S22-5 (SRM1) Always Below 1 Ω
      S14-6 (SRM1) - Body ground Always 10 kΩ or higher
      S14-21 (SRM2) - S22-23 (SRM2) Always Below 1 Ω
      S14-21 (SRM2) - Body ground Always 10 kΩ or higher

    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 DTC (See Pub. No. RM1008E, page 05-195).

    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 (See Pub. No. RM1008E, page 05-195).

      Result
      Result Proceed to
      DTCs (C0226/21, C0236/22, C0246/23, C0256/24 and/or C1227/27) are not output A
      DTCs (C0226/21, C0236/22, C0246/23, C0256/24 and/or C1227/27) 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 ignition switch ON and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.

      • If the normal system code is output (the trouble code is not output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU and 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 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

    A

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here