Dtc C0226 Sfr Solenoid Circuit

Brake. Corolla. Zre142 Aze141
Brake Control Dynamic Control Systems. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

RECONFIRM DTC

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


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
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 0.05 seconds or more.
  5. Either of the following conditions continues for 0.2 seconds or more:
    1. SM1 output is 2 times more than SM2 output.
    2. SM2 output is 2 times more than SM2 output.
  1. SM1 or SM2 circuit
  2. Brake actuator assembly

WIRING DIAGRAM


Corolla. Zre142 Aze141.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C0226 Sfr Solenoid Circuit


INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (COROLLA_ZRE142 RM000000XHR08KX.html).
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 DTCs (COROLLA_ZRE142 RM000000XHV0F2X.html).

  1. Start the engine.

  1. Check if the same DTC is recorded (COROLLA_ZRE142 RM000000XHV0F2X.html).

    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
    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 (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.
    3. 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.
    4. It is suspected that the DTCs were output due to a bad connection of the connector terminal.


B
REPLACE BRAKE ACTUATOR ASSEMBLY (COROLLA_ZRE142 RM000003CZU00MX.html)
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (COROLLA_ZRE142 RM000000XHP0EKX.html)