Dtc C1225 Sm Solenoid Circuit

Brake. Yaris. Ncp93, 131
Brake Control Dynamic Control Systems. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

RECONFIRM DTC

DTC C1225 SM Solenoid Circuit

DTC C1468 SFR Solenoid Circuit

DTC C1469 SFL Solenoid Circuit

DTC C146A SRR Solenoid Circuit

DTC 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.
DTC Detection Condition
Trouble Area
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. Brake actuator assembly
C1468
C1469
C146A
C146B
Open or short in the solenoid circuit continues for 0.05 seconds or more.
  1. Brake actuator assembly

WIRING DIAGRAM


Yaris. Ncp93, 131.Brake Control Dynamic Control Systems.Anti-Lock Brake System (For Sedan). Dtc C1225 Sm Solenoid Circuit


INSPECTION PROCEDURE

NOTICE:
  1. When replacing the brake actuator assembly, perform zero point calibration (YARIS_NCP93 RM000000XHR078X.html).
  2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.RECONFIRM DTC
HINT:
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 (YARIS_NCP93 RM000000XHV0CQX.html).

  1. Start the engine.

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

  1. Check if the same DTC is recorded (YARIS_NCP93 RM000000XHV0CQX.html).

Result
Result
Proceed to
DTC is not output
A
DTC is output
B
HINT:
  1. If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU (brake actuator assembly), 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 skid control ECU (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 (brake actuator assembly)), 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 (YARIS_NCP93 RM000001BXP02KX.html)
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (YARIS_NCP93 RM000000XHS0ANX.html)