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

WARNING: This page is about a different car, the 2009 Lexus IS 350 and 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

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.	Solenoid circuit Brake actuator assembly
C1225	Any of the following is detected: While switching solenoid (SM1 or SM2) is ON, overcurrent continues for 0.15 seconds or more. While switching solenoid (SM1 or SM2) is OFF, an open circuit continues for 0.05 seconds or more. While switching solenoid (SM1 or SM2) is ON, an open circuit continues for 0.05 seconds or more. While switching solenoid (SM1 or SM2) is OFF, current continues to be applied for 0.1 seconds or more. Short to GND in the switching solenoid (SM1 or SM2) continues for 0.1 seconds or more. Switching solenoids SM1 and SM2 are shorted for 0.1 seconds or more.	SM1 or SM2 circuit Brake actuator assembly