LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Brake Control / Dynamic Control Systems) >> Vehicle Stability Control System >> DTC C0226/21 SFR Solenoid Circuit; DTC C0236/22 SFL Solenoid Circuit; DTC C0246/23 SRR Solenoid Circuit; DTC C0256/24 SRL Solenoid Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: When replacing the skid control ECU, perform zero point calibration and store system information (See CALIBRATION  ).

HINT

When C0278/11 and/or C0279/12 is output together with C0226/21, C0236/22, C0246/23, and/or C0256/ 24, inspect and repair the trouble areas indicated by C0278/11 and/or C0279/12 first (See DTC C0278/11 OPEN IN ABS SOLENOID RELAY CIRCUIT; DTC C0279/12 SHORT TO B+ IN ABS SOLENOID RELAY CIRCUIT  ).

  1. INSPECT BRAKE ACTUATOR ASSEMBLY 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connector.
    2. Disconnect the brake actuator connector
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      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
      Fig 1: Identifying Brake Actuator Connector
      G05752578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE BRAKE ACTUATOR ASSEMBLY  (See REMOVAL  )

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE ACTUATOR) 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
    2. Disconnect the skid control ECU connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      Fig 2: Identifying Harness And Connector (Skid Control ECU - Brake Actuator)
      G05752579Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      STANDARD RESISTANCE

      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

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. RECONFIRM DTC 
    1. Reconnect the skid control ECU connectors and the brake actuator connector
    2. Clear the DTCs (See DTC CHECK / CLEAR  )
    3. Start the engine
    4. Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.
    5. Check if the same DTC is recorded (See DTC CHECK / CLEAR  )

      Result 

      RESULT REFERENCE

      Result Proceed to
      DTCs (C0226/21, C0236/22, C0246/23, and C0256/24) are not output A
      DTCs (C0226/21, C0236/22, C0246/23, and/or C0256/24) are output B

      HINT

      • If a speed signal of 6 km/h (4 mph) 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 (no trouble codes are output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU and/or brake actuator assembly Make sure that no DTCs are output
      • If any DTCs are output while jiggling a connector or wire harness of the skid control ECU and/or brake actuator assembly, inspect and repair the connector or wire harness.
      • It is suspected that the DTCs were output due to a bad connection of the connector terminal.

    B: REPLACE SKID CONTROL ECU  (See REMOVAL  )

    A: CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)  (See DIAGNOSIS SYSTEM  )

scientia non olet · About LEMON Manuals