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

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

DESCRIPTION

The solenoid comes on when signals are received from the ECU and controls the pressure acting on the wheel cylinders, thus controlling brake force.

If any DTCs are output, the solenoid does not come on because the solenoid relay is forcibly turned off by the fail-safe function.

DTC No. DTC Detection Condition Trouble Area
C0226/21 Open or short circuit in SFRH or SFRR circuit continues for 0.05 seconds or more.

  • SFRH or SFRR circuit


  • Brake actuator assembly
C0236/22 Open or short circuit in SFLH or SFLR circuit continues for 0.05 seconds or more.

  • SFLH or SFLR circuit


  • Brake actuator assembly
C0246/23 Open or short circuit in SRRH or SRRR circuit continues for 0.05 seconds or more.

  • SRRH or SRRR circuit


  • Brake actuator assembly

WIRING DIAGRAM

A003HE1E03

INSPECTION PROCEDURE

PROCEDURE


  1. RECONFIRM DTC

    Tech Tips

    These codes are detected when a problem is identified in the brake actuator.

    The solenoid circuit is in the brake actuator.

    Therefore, solenoid circuit inspection and solenoid unit inspection cannot be performed. Be sure to check if any DTC is output before replacing the brake actuator assembly.


    1. Clear the DTCs Click here.

    2. Start the engine.

    3. Drive the vehicle at the speed of 4 mph (6 km/h) or more.

    4. Check that the same DTCs are recorded Click here.

      Tech Tips

      If a speed signal of 4 mph (6 km/h) 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.

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

      Tech Tips


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


      • If the normal system code is output, slightly jiggle the connectors, wire harnesses, and fuses of the brake actuator assembly. Make sure that no DTCs are output.


      • These DTCs may be stored due to a malfunction in the connector terminal connection, etc.


    B

    END

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY