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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 IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED 
    1. Check the skid control ECU connector's connecting condition.

    OK: 

    The connector should be securely connected. 

    1. NG: CONNECT CONNECTOR TO ECU 
    2. OK: GO TO NEXT STEP 
  2. 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 
  3. CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND COMBINATION METER) ( HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    1. Disconnect the skid control ECU connector and combination meter connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      S28-33 (HDCW) - C11-10 Below 1Ω
      S28-33 (HDCW) - Body ground 10 kΩ or higher
      Fig 1: Identifying Connectors (Skid Control ECU And Combination Meter)
      G02584636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 
  4. INSPECT COMBINATION METER ASSY 
    1. Check the combination meter system (see HOW TO PROCEED WITH TROUBLESHOOTING ).
    1. NG: REPLACE COMBINATION METER ASSY ( COMBINATION METER ASSY  ) 
    2. OK: GO TO NEXT STEP 
  5. INSPECT SKID CONTROL ECU (HDCS TERMINAL) 
    1. Disconnect the skid control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION, CONDITION AND SPECIFIED CONDITION (1 OF 2)

      Tester Connection Condition Specified Condition
      S28-44 (HDCS) - Body ground DAC switch is not pushed in 10 kΩ or higher
      Fig 2: Inspecting Skid Control ECU (HDCS Terminal)
      G02584637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. NG: go to step 6 
      2. OK: GO TO NEXT STEP 

        REPLACE MASTER CYLINDER SOLENOID (SEE  OVERHAUL  ) 

  6. INSPECT DOWNHILL ASSIST CONTROL SWITCH 
    1. Disconnect the DAC switch connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION, CONDITION AND SPECIFIED CONDITION (2 OF 2)

      Tester Connection Condition Specified Condition
      D5-3 - D5-4 Switch is pushed in Below 1Ω
      D5-3 - D5-4 Switch is not pushed in 10 kΩ or higher
      Fig 3: Inspecting Downhill Assist Control Switch
      G02584638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE DOWNHILL ASSIST CONTROL SWITCH 
    2. OK: GO TO NEXT STEP 
  7. CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU, BODY GROUND AND DOWNHILL ASSIST CONTROL SWITCH) ( HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      S28-44 (HDCS) - D5-3 Below 1Ω
      S28-44 (HDCS) - Body ground 10 kΩ or higher
      D5-4 - Body ground Below 1Ω
      Fig 4: Identifying Connector (Skid Control ECU And Downhill Assist Control Switch)
      G02584639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 

      END 

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