Lexus IS250 IS220d GSE20 ALE20 - BRAKE CONTROL
DTC C0226/21 SFR Solenoid Circuit
DTC C0236/22 SFL Solenoid Circuit
DTC C0246/23 SRR Solenoid Circuit
DTC C0256/24 SRL Solenoid Circuit
DTC C1225/25 SM Solenoid Circuit
DESCRIPTION
These solenoids turn on when signals are received from the skid control ECU and control the pressure acting on the wheel cylinders to control the braking force.
| DTC No. | DTC Detection Condition | Trouble Area |
| C0226/21 C0236/22 C0246/23 C0256/24 | Open or short in the solenoid circuit continues for 0.05 seconds or more. | Brake actuator assembly Solenoid circuit |
| C1225/25 | When any of the following is detected: While switching solenoid (SM1 or SM2) ON, is being output overcurrent continues for 0.05 seconds or more. While switching solenoid (SM1 or SM2) OFF is being output, an open circuit continues for 0.05 seconds or more. While switching solenoid (SM1 or SM2) ON is being output, an open circuit continues for 0.1 seconds or more. While switching solenoid (SM1 or SM2) OFF is being output, 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. | Brake actuator assembly SM1 or SM2 circuit |
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- When replacing the brake actuator assembly, perform zero point calibration ( ).
| 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 DTC code is output before replacing the brake actuator assembly.
Clear the DTC .
Start the engine.
Drive the vehicle at the speed of 4 mph (6 km/h) or more.
Check if the same DTC is recorded .
- Result:
Condition Proceed to DTCs (C0226/21, C0236/22, C0246/23, C0256/24 and/or C1225/25) are not output A DTCs (C0226/21, C0236/22, C0246/23, C0256/24 and/or C1225/25) are output B
- HINT:
If a speed signal of 4 mph (6 km/h) or more is input to the skid control ECU, with the engine switch on (IG) and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.
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.
If any DTCs are output while jiggling a connector or wire harness of the brake actuator (skid control ECU), inspect and repair the connector or wire harness.
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LEXUS IS250, IS220d / GSE20 ALE20