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Home >> Toyota >> 2003 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 768 (Brakes - Abs With EBD & BA & TRAC & VSC (Diagnostics)) >> DTC C1242/42: Open Circuit In IG2 Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2005 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  .
  1. INSPECT BATTERY 
    1. Check the battery voltage.

      Standard: 

      Voltage: 11 to 14 V 

    1. NG: INSPECT CHARGING SYSTEM ( ON-VEHICLE INSPECTION  ,  ON-VEHICLE INSPECTION  ) 
    2. 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 Ω 

    1. NG: CHECK FOR SHORT IN ALL HARNESS AND CONNECTOR CONNECTED TO FUSE AND REPLACE FUSE 
    2. OK: 
  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 the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION (1 OF 2)

      Tester Connection Specified Condition
      S29-1 (IG2) - Body ground 10 to 14 V
      Fig 1: Identifying Skid Control ECU Connector Terminal
      G02584543Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 CIRCUIT) 
    2. 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 the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION (2 OF 2)

      Tester Connection Specified Condition
      S28-1 (GND1) - Body ground Below 1 Ω
      S28-32 (GND2) - Body ground Below 1 Ω
      S29-4 (GND3) - Body ground Below 1 Ω
      Fig 2: Inspecting Skid Control ECU (GND Terminal Continuity)
      G02584544Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 
    2. 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 DESCRIPTION

      DTC is output A
      DTC is not output B
    1. B: END 
    2. A: REPLACE MASTER CYLINDER SOLENOID (SEE  OVERHAUL  )