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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 C1242/42 Open Circuit In IG2 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 BATTERY 
    1. Check the battery voltage.

      Standard: Voltage: 11 to 14 V 

    NG: INSPECT CHARGING SYSTEM (See  ON-VEHICLE INSPECTION  ,  ON-VEHICLE INSPECTION  ) 

    OK: Go to next step 

  2. INSPECT FUSE (IGN FUSE) 
    1. Remove the IGN fuse from the driver side J/B.
    2. Check the IGN fuse.

      Standard: Below 1  

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

    OK: Go to next step 

  3. INSPECT SKID CONTROL ECU (IG2 TERMINAL VOLTAGE) 
    1. Install the IGN fuse.
    2. Disconnect the skid control ECU (S29) connector.
    3. Turn the ignition switch to the ON position.
    4. Measure the voltage according to the value(s) in TERMINALS VOLTAGE SPECIFICATION TABLE .

      Standard: 

      TERMINALS VOLTAGE SPECIFICATION TABLE

      Tester Connection Specified Condition
      S29-1 (IG2) - Body ground 10 to 14 V
      Fig 1: Identifying Skid Control ECU Connector
      G04335977Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 CIRCUIT) 

    OK: Go to next step 

  4. INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY) 
    1. Disconnect the skid control ECU 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
      G04335978Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    OK: Go to next step 

  5. RECONFIRM DTC 
    1. Clear the DTC (See DTC CHECK/CLEAR  ).
    2. Check if the same DTC is 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  )