Dtc C0226/21 Sfr Solenoid Circuit

Brake. Lexus Is250, Is220D. Gse20 Ale20
Brake Control. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT BRAKE ACTUATOR ASSEMBLY

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE ACTUATOR ASSEMBLY)

RECONFIRM DTC

DTC C0226/21 SFR Solenoid Circuit

DTC C0236/22 SFL Solenoid Circuit

DTC C0246/23 SRR Solenoid Circuit

DTC C0256/24 SRL 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
When any of the following is detected:
  1. Open or short in the solenoid circuit continues for 0.05 seconds or more.
  2. While solenoid OFF is being output, an open circuit continues for 0.05 seconds or more.
  3. While solenoid ON is being output, overcurrent continues for 0.05 seconds or more.
  4. While solenoid ON is being output, an open circuit continues for 0.1 seconds or more.
  5. While solenoid OFF is being output, current continues to be applied for 0.1 seconds or more.
  6. Short to GND in the solenoid continues for 0.1 seconds or more.
  1. Solenoid circuit
  2. Skid control ECU

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim). Dtc C0226/21 Sfr Solenoid Circuit


INSPECTION PROCEDURE

NOTICE:
When replacing the skid control ECU, perform zero point calibration and store system information (Click here ).
HINT:
When C0278/11 or C0279/12 is output together with C0226/21, C0236/22, C0246/23, or C0256/24, inspect and repair the trouble areas indicated by C0278/11 or C0279/12 first.
1.INSPECT BRAKE ACTUATOR ASSEMBLY


    Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim). Dtc C0226/21 Sfr Solenoid Circuit

  1. Disconnect the brake actuator connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    31 (BS) - 9 (SFRR)
    		Always
    		4.0 to 4.6 Ω
    at 25°C (77°F)
    9 (SFRR) - Body ground
    		Always
    		10 kΩ or higher
    31 (BS) - 10 (SFLR)
    		Always
    		4.0 to 4.6 Ω
    at 25°C (77°F)
    10 (SFLR) - Body ground
    		Always
    		10 kΩ or higher
    31 (BS) - 11 (SRRR)
    		Always
    		4.0 to 4.6 Ω
    at 25°C (77°F)
    11 (SRRR) - Body ground
    		Always
    		10 kΩ or higher
    31 (BS) - 12 (SRLR)
    		Always
    		4.0 to 4.6 Ω
    at 25°C (77°F)
    12 (SRLR) - Body ground
    		Always
    		10 kΩ or higher
    33 (FRA+) - 34 (FRA-)
    		Always
    		4.8 to 5.4 Ω
    at 25°C (77°F)
    34 (FRA-) - Body ground
    		Always
    		10 kΩ or higher
    35 (FLA+) - 36 (FLA-)
    		Always
    		4.8 to 5.4 Ω
    at 25°C (77°F)
    36 (FLA-) - Body ground
    		Always
    		10 kΩ or higher
    4 (RRA+) - 5 (RRA-)
    		Always
    		4.8 to 5.4 Ω
    at 25°C (77°F)
    5 (RRA-) - Body ground
    		Always
    		10 kΩ or higher
    6 (RLA+) - 8 (RLA-)
    		Always
    		4.8 to 5.4 Ω
    at 25°C (77°F)
    8 (RLA-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPLACE BRAKE ACTUATOR ASSEMBLY
OK


2.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE ACTUATOR ASSEMBLY)


    Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim). Dtc C0226/21 Sfr Solenoid Circuit

  1. Disconnect the skid control ECU connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    LHD:
    Tester Connection
    		Condition
    		Specified Condition
    A35-1 (SFRR) - A13-9 (SFRR)
    		Always
    		Below 1 Ω
    A35-1 (SFRR) - Body ground
    		Always
    		10 kΩ or higher
    A35-13 (SFLR) - A13-10 (SFLR)
    		Always
    		Below 1 Ω
    A35-13 (SFLR) - Body ground
    		Always
    		10 kΩ or higher
    A35-12 (SRRR) - A13-11 (SRRR)
    		Always
    		Below 1 Ω
    A35-12 (SRRR) - Body ground
    		Always
    		10 kΩ or higher
    A35-2 (SRLR) - A13-12 (SRLR)
    		Always
    		Below 1 Ω
    A35-2 (SRLR) - Body ground
    		Always
    		10 kΩ or higher
    J78-23 (FRA+) - A13-33 (FRA+)
    		Always
    		Below 1 Ω
    J78-23 (FRA+) - Body ground
    		Always
    		10 kΩ or higher
    J78-10 (FRA-) - A13-34 (FRA-)
    		Always
    		Below 1 Ω
    J78-10 (FRA-) - Body ground
    		Always
    		10 kΩ or higher
    J78-21 (FLA+) - A13-35 (FLA+)
    		Always
    		Below 1 Ω
    J78-21 (FLA+) - Body ground
    		Always
    		10 kΩ or higher
    J78-8 (FLA-) - A13-36 (FLA-)
    		Always
    		Below 1 Ω
    J78-8 (FLA-) - Body ground
    		Always
    		10 kΩ or higher
    J78-7 (RRA+) - A13-4 (RRA+)
    		Always
    		Below 1 Ω
    J78-7 (RRA+) - Body ground
    		Always
    		10 kΩ or higher
    J78-20 (RRA-) - A13-5 (RRA-)
    		Always
    		Below 1 Ω
    J78-20 (RRA-) - Body ground
    		Always
    		10 kΩ or higher
    J78-9 (RLA+) - A13-6 (RLA+)
    		Always
    		Below 1 Ω
    J78-9 (RLA+) - Body ground
    		Always
    		10 kΩ or higher
    J78-22 (RLA-) - A13-8 (RLA-)
    		Always
    		Below 1 Ω
    J78-22 (RLA-) - Body ground
    		Always
    		10 kΩ or higher
    RHD:
    Tester Connection
    		Condition
    		Specified Condition
    J98-1 (SFRR) - A13-9 (SFRR)
    		Always
    		Below 1 Ω
    J98-1 (SFRR) - Body ground
    		Always
    		10 kΩ or higher
    J98-13 (SFLR) - A13-10 (SFLR)
    		Always
    		Below 1 Ω
    J98-13 (SFLR) - Body ground
    		Always
    		10 kΩ or higher
    J98-12 (SRRR) - A13-11 (SRRR)
    		Always
    		Below 1 Ω
    J98-12 (SRRR) - Body ground
    		Always
    		10 kΩ or higher
    J98-2 (SRLR) - A13-12 (SRLR)
    		Always
    		Below 1 Ω
    J98-2 (SRLR) - Body ground
    		Always
    		10 kΩ or higher
    J78-23 (FRA+) - A13-33 (FRA+)
    		Always
    		Below 1 Ω
    J78-23 (FRA+) - Body ground
    		Always
    		10 kΩ or higher
    J78-10 (FRA-) - A13-34 (FRA-)
    		Always
    		Below 1 Ω
    J78-10 (FRA-) - Body ground
    		Always
    		10 kΩ or higher
    J78-21 (FLA+) - A13-35 (FLA+)
    		Always
    		Below 1 Ω
    J78-21 (FLA+) - Body ground
    		Always
    		10 kΩ or higher
    J78-8 (FLA-) - A13-36 (FLA-)
    		Always
    		Below 1 Ω
    J78-8 (FLA-) - Body ground
    		Always
    		10 kΩ or higher
    J78-7 (RRA+) - A13-4 (RRA+)
    		Always
    		Below 1 Ω
    J78-7 (RRA+) - Body ground
    		Always
    		10 kΩ or higher
    J78-20 (RRA-) - A13-5 (RRA-)
    		Always
    		Below 1 Ω
    J78-20 (RRA-) - Body ground
    		Always
    		10 kΩ or higher
    J78-9 (RLA+) - A13-6 (RLA+)
    		Always
    		Below 1 Ω
    J78-9 (RLA+) - Body ground
    		Always
    		10 kΩ or higher
    J78-22 (RLA-) - A13-8 (RLA-)
    		Always
    		Below 1 Ω
    J78-22 (RLA-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.RECONFIRM DTC

  1. Reconnect the skid control ECU connector and the brake actuator connector.

  1. Clear the DTC (Click here).

  1. Start the engine.

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

    Result:

    Condition
    		Proceed to
    DTCs (C0226/21, C0236/22, C0246/23, and/or C0256/24) are not output
    		A
    DTCs (C0226/21, C0236/22, C0246/23, and/or C0256/24) are output
    		B
    HINT:
    1. 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 and brake actuator assembly. Make sure that no DTCs are output.
    2. If any DTCs are output while jiggling a connector or wire harness of the skid control ECU and brake actuator assembly, inspect and repair the connector or wire harness.


B
REPLACE SKID CONTROL ECU
A

USE SIMULATION METHOD TO CHECK