VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C0226, C0236, C0246, C0256, C1225

DTC Code DTC Name
C0226 SFR Solenoid Circuit
C0236 SFL Solenoid Circuit
C0246 SRR Solenoid Circuit
C0256 SRL Solenoid Circuit
C1225 SM Solenoid Circuit

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area

C0226

C0236

C0246

C0256

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

  • Solenoid circuit

  • Brake actuator assembly
C1225

Any of the following is detected:


  1. While switching solenoid (SM1 or SM2) is ON, overcurrent continues for 0.15 seconds or more.

  2. While switching solenoid (SM1 or SM2) is OFF, an open circuit continues for 0.05 seconds or more.

  3. While switching solenoid (SM1 or SM2) is ON, an open circuit continues for 0.05 seconds or more.

  4. While switching solenoid (SM1 or SM2) is OFF, current continues to be applied for 0.1 seconds or more.

  5. Short to GND in the switching solenoid (SM1 or SM2) continues for 0.1 seconds or more.

  6. Switching solenoids SM1 and SM2 are shorted for 0.1 seconds or more.

  • SM1 or SM2 circuit

  • Brake actuator assembly

WIRING DIAGRAM

A017C4SE01

INSPECTION PROCEDURE

Note

When replacing the brake actuator assembly, perform zero point calibration Click here.

PROCEDURE


  1. RECONFIRM DTC

    Tech Tips

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

    The solenoid circuits are in the brake actuator assembly.

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


    1. Clear the DTCs Click here.

    2. Start the engine.

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

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

      Result
      Result Proceed to
      DTCs (C0226, C0236, C0246, C0256 and C1225) are not output A
      DTCs (C0226, C0236, C0246, C0256 and/or C1225) 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 (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 brake actuator assembly. Make sure that no DTCs are output.

      • If any DTCs are output while jiggling a connector or wire harness of the brake actuator assembly (skid control ECU), 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 BRAKE ACTUATOR ASSEMBLY Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here