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 DTCs are stored when a problem is determined in the skid control ECU (brake actuator assembly).

The brake actuator assembly 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
C1225 SM Solenoid Circuit

Any of the following is detected:


  1. While switching solenoid (SM1 or SM2) is on, overcurrent continues for 0.1 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 0.05 seconds or more.

  5. A condition in which the outputs from switching solenoids (SM1 and SM2) are different continues for 0.2 seconds or more.

  • Solenoid circuit

  • Solenoid valve (brake actuator assembly)
C1468 SFR Solenoid Circuit An open or short in the solenoid circuit continues for 0.05 seconds or more.

  • Solenoid circuit

  • Solenoid valve (brake actuator assembly)
C1469 SFL Solenoid Circuit An open or short in the solenoid circuit continues for 0.05 seconds or more.

  • Solenoid circuit

  • Solenoid valve (brake actuator assembly)
C146A SRR Solenoid Circuit An open or short in the solenoid circuit continues for 0.05 seconds or more.

  • Solenoid circuit

  • Solenoid valve (brake actuator assembly)
C146B SRL Solenoid Circuit An open or short in the solenoid circuit continues for 0.05 seconds or more.

  • Solenoid circuit

  • Solenoid valve (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

    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 skid control ECU (brake actuator assembly).


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the engine switch off.

    3. Start the engine.

    4. Perform a road test.

    5. Check if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTCs C1225, C1468, C1469, C146A and C146B are not output. A
      DTCs C1225, C1468, C1469, C146A and/or C146B are output. B

      Tech Tips


      • The skid control ECU (brake actuator assembly) performs self diagnosis of the solenoid circuit after the engine switch is turned on (IG).

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

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

      • If no DTCs were output when reconfirming DTCs, checking for intermittent problems is necessary because it is suspected that the original DTCs were stored due to the poor connection of a connector terminal.


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here