DTC    C0226    SFR Solenoid Circuit

DTC    C0236    SFL Solenoid Circuit

DTC    C0246    SRR Solenoid Circuit

DTC    C0256    SRL Solenoid Circuit

DTC    C1225    SM Solenoid Circuit

for Preparation Click here


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.
  1. Solenoid circuit
  2. Brake actuator assembly
C1225
When any of the following is detected:
  1. While outputting switching solenoid (SM1 or SM2) ON, overcurrent continues for 0.1 seconds or more.
  2. While outputting switching solenoid (SM1 or SM2) OFF, an open circuit continues for 0.05 seconds or more.
  3. While outputting switching solenoid (SM1 or SM2) ON, an open circuit continues for 0.05 seconds or more.
  4. While outputting switching solenoid (SM1 or SM2) OFF, current continues to be applied for 0.05 seconds or more.
  5. A condition in which the outputs from switching solenoids 1 and 2 are different continues for 0.2 seconds or more.
  1. SM1 or SM2 circuit
  2. Brake actuator assembly

WIRING DIAGRAM


C204771E01


INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (Click here).

1.RECONFIRM DTC

HINT:
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 DTC (Click here).

  1. Start the engine.

  1. Drive the vehicle at the speed of 20 km/h (12 mph) or more.

  1. Check if the same DTC is recorded (Click here).

    Result:

    Result
    		Proceed to
    DTC not output
    		A
    DTC output
    		B

    HINT:
    1. 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.
    2. If the normal system code is output (the trouble code is not output), slightly jiggle the connectors, wire harness, and fuses of the brake actuator assembly. Make sure that no DTCs are output.
    3. If any DTCs are output while jiggling a connector or wire harness from the brake actuator assembly (skid control ECU), inspect and repair the connector or wire harness.
    4. The DTCs were probably 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)