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Home >> Lexus >> 2006 >> RX 330 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Brakes - Abs With EBD & BD & TRAC & VSC (Diagnostics)) >> DTC C0278/11, C0279/12: Open Or Short Circuit In Abs Solenoid Relay Circuit; +B Short Circuit In Abs Solenoid Relay Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: When replacing the master cylinder solenoid, perform zero point calibration (See CALIBRATION  ).
  1. INSPECT FUSE (ABS SOL FUSE) 
    1. Remove the ABS SOL fuse from the engine room R/B.
    2. Check the ABS SOL fuse.

      Standard: Below 1  

    NG: CHECK FOR SHORT IN ALL HARNESS AND CONNECTOR CONNECTED TO FUSE AND REPLACE FUSE 

    OK: Go to next step 

  2. INSPECT SKID CONTROL ECU (+BS TERMINAL VOLTAGE) 
    1. Install the ABS SOL fuse.
    2. Disconnect the skid control ECU connector.
    3. Measure the voltage according to the value(s) in TERMINALS VOLTAGE SPECIFICATION TABLE .

      Standard: 

      TERMINALS VOLTAGE SPECIFICATION TABLE

      Tester Connection Condition Specified Condition
      S28-31 (+BS) - Body ground Always 10 to 14 V
      Fig 1: Identifying Skid Control ECU Connector Terminals
      G04335960Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (+BS CIRCUIT) 

    OK: Go to next step 

  3. INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY) 
    1. Disconnect the skid control ECU (S29) connector.
    2. Measure the resistance according to the value(s) in TERMINALS RESISTANCE SPECIFICATION TABLE .

      Standard: 

      TERMINALS RESISTANCE SPECIFICATION TABLE

      Tester Connection Specified Condition
      S28-1 (GND1) - Body ground Below 1
      S28-32 (GND2) - Body ground Below 1
      S29-4 (GND3) - Body ground Below 1
      Fig 2: Identifying Skid Control ECU Connectors
      G04335961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 

    OK: Go to next step 

  4. RECONFIRM DTC 

    HINT:

    These codes are detected when a problem is determined in the master cylinder solenoid.

    The ABS solenoid relay is in the master cylinder solenoid.

    Therefore, solenoid relay circuit inspection and relay unit inspection cannot be performed. Be sure to check if any DTC is output before replacing the master cylinder solenoid.

    1. Clear the DTCs (See DTC CHECK/CLEAR  ).
    2. Check if the same DTCs are detected (See DTC CHECK/CLEAR  ).

    HINT:

    Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

    Result: 

    RESULT REFERENCE

    DTC is output A
    DTC is not output B

    B: END 

    A: Go to next step 

    REPLACE MASTER CYLINDER SOLENOID (See  OVERHAUL  ) 

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