VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1225, C1468, C1469, C146A, C146B

DTC Code DTC Name
C1225 SM Solenoid Circuit
C1468 SFR Solenoid Circuit
C1469 SFL Solenoid Circuit
C146A SRR Solenoid Circuit
C146B SRL Solenoid Circuit

DESCRIPTION

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

DTC No. Detection Item DTC Detection Condition Trouble Area Note
C1225 SM Solenoid Circuit

Any of the following is detected:


  1. While master cylinder cut solenoid outputs ON, overcurrent continues for 0.1 seconds or more.

  2. While master cylinder cut solenoid outputs OFF, open circuit continues for 0.05 seconds or more.

  3. While master cylinder cut solenoid outputs ON, open circuit continues for 0.05 seconds or more.

  4. While master cylinder cut solenoid outputs OFF, current is maintained for 0.05 seconds or more.

  5. Difference in master cylinder cut solenoid output accuracy continues for 0.2 seconds or more.

 Brake actuator assembly -
C1468 SFR Solenoid Circuit

Any of the following is detected:


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

  2. While holding solenoid outputs OFF, open circuit continues for 0.05 seconds or more.

  3. While holding solenoid outputs OFF, current is maintained for 0.05 seconds or more.

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

  5. While holding solenoid outputs ON, open circuit continues for 0.05 seconds or more.

  6. Difference in holding solenoid LH and RH accuracy continues for 0.2 seconds or more.

 Brake actuator assembly -
C1469 SFL Solenoid Circuit

Any of the following is detected:


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

  2. While holding solenoid outputs OFF, open circuit continues for 0.05 seconds or more.

  3. While holding solenoid outputs OFF, current is maintained for 0.05 seconds or more.

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

  5. While holding solenoid outputs ON, open circuit continues for 0.05 seconds or more.

  6. Difference in holding solenoid LH and RH accuracy continues for 0.2 seconds or more.

 Brake actuator assembly -
C146A SRR Solenoid Circuit

Any of the following is detected:


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

  2. While holding solenoid outputs OFF, open circuit continues for 0.05 seconds or more.

  3. While holding solenoid outputs OFF, current is maintained for 0.05 seconds or more.

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

  5. While holding solenoid outputs ON, open circuit continues for 0.05 seconds or more.

  6. Difference in holding solenoid LH and RH accuracy continues for 0.2 seconds or more.

 Brake actuator assembly -
C146B SRL Solenoid Circuit

Any of the following is detected:


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

  2. While holding solenoid outputs OFF, open circuit continues for 0.05 seconds or more.

  3. While holding solenoid outputs OFF, current is maintained for 0.05 seconds or more.

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

  5. While holding solenoid outputs ON, open circuit continues for 0.05 seconds or more.

  6. Difference in holding solenoid LH and RH accuracy continues for 0.2 seconds or more.

 Brake actuator assembly -

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information.

Click here

PROCEDURE


  1. RECONFIRM DTC

    Tech Tips

    These codes are detected when a problem is determined in the skid control ECU (brake actuator assembly).

    The solenoid circuits are in the skid control ECU (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 skid control ECU (brake actuator assembly).


    1. Clear the DTC.

      Click here


      Chassis > ABS/VSC/TRC/EPB > Clear DTCs

    2. Turn the engine switch off.

    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


      Chassis > ABS/VSC/TRC/EPB > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

      Tech Tips


      • If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU (brake actuator assembly), 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 (the trouble code is not output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU (brake actuator assembly). Make sure that no DTCs are output.

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

      • The DTCs were probably output due to a bad connection of the connector terminal.


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here