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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 C1258/58: Open Circuit In 2-4 Signal Change 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 SKID CONTROL ECU (EXI3 TERMINAL VOLTAGE) 
    1. Disconnect the skid control ECU connector.
    2. Turn the ignition switch to the ON position.
    3. Measure the voltage according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION, CONDITION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      S28-26(EXI3)- Body ground 4WD control (4WD) switch ON (Transfer 4WD position) Below 1.5 V
      S28-26 (EXI3)-Body ground 4WD control (4WD) switch ON (Transfer 2WD position 8 to 14 V
      Fig 1: Identifying Skid Control ECU EXI3 Terminal
      G02584569Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result: 

      RESULT DESCRIPTION

      OK: (When troubleshooting in accordance with the DTC CHART.) A
      OK: (When troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE.) B
      NG C
    1. B: proceed to next circuit inspection shown in  PROBLEM SYMPTOMS TABLE  
    2. C: Go to step   4 
    3. A: GO TO NEXT STEP 
  2. INSPECT ECM (4WD TERMINAL VOLTAGE) 
    1. Turn the ignition switch off.
    2. Disconnect the ECM 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, CONDITION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      E6-8(4WD)- 3.58 to 5 V 4WD control (4WD) switch ON (Transfer 4WD position Below 1.5 V
      E6-8 (4WD)- 4WD Body ground (4WD) control (4WD) switch ON (Transfer 2WD (position) 8 to 14 V
      Fig 2: Identifying ECM 4WD Terminal
      G02584570Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   4 
    2. OK: GO TO NEXT STEP 
  3. RECONFIRM DTC 
    1. Start the engine.
    2. Clear the DTC (see DTC CHECK/CLEAR  ).
    3. 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  ) 
  4. INSPECT FOUR WHEEL DRIVE CONTROL SWITCH (GND TERMINAL CONTINUITY) 
    1. Disconnect the 4WD control (4WD) switch connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      F11 -4 (GND) - Body ground Below 1 Ω
      Fig 3: Identifying Four Wheel Drive Control Switch GND Terminal
      G02584571Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 
    2. OK: GO TO NEXT STEP 
  5. INSPECT FOUR WHEEL DRIVE CONTROL SWITCH 
    1. Check the select 2-4 and high-low system (see INSPECTION ).
    1. NG: REPLACE FOUR WHEEL DRIVE CONTROL SWITCH 
    2. OK: GO TO NEXT STEP 
  6. INSPECT FOUR WHEEL DRIVE CONTROL ECU 
    1. Check the select 2-4 and high-low system (INSPECTION ).
    1. NG: REPLACE FOUR WHEEL DRIVE CONTROL ECU 
    2. OK: GO TO NEXT STEP 
  7. CHECK HARNESS AND CONNECTOR (BETWEEN FOUR WHEEL DRIVE CONTROL ECU AND FOUR WHEEL DRIVE CONTROL SWITCH) ( HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    1. Disconnect the 4WD control ECU (F9) connector and 4WD control (4WD) switch connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION (1 OF 3)

      Tester Connection Specified Condition
      F9-8 (2-4) - F11 -5 (2-4) Below 1 Ω
      F9-8 (2-4) - Body ground 10 kΩ or higher
      Fig 4: Identifying Connectors (Four Wheel Drive Control ECU And Four Wheel Drive Control Switch)
      G02584572Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 
  8. CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND FOUR WHEEL DRIVE CONTROL ECU) ( HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    1. Disconnect the 4WD control ECU (F10) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION (2 OF 3)

      Tester Connection Specified Condition
      S28-26 (EXI3) - F10-18 (ADD) Below 1 Ω
      S28-26 (EXI3) - Body ground 10 kΩ or higher
      Fig 5: Identifying Connectors (Skid Control ECU And Four Wheel Drive Control ECU)
      G02584573Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
      2. OK: GO TO NEXT STEP 
  9. CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND ECM) ( HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION (3 OF 3)

      Tester Connection Specified Condition
      S28-26 (EXI3) - E6-8 (4WD) Below 1 Ω
      S28-26 (EXI3) - Body ground 10 kΩ or higher
      Fig 6: Identifying Connectors (Skid Control ECU And ECM)
      G02584574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result: 

    RESULT DESCRIPTION

    OK: (When troubleshooting in accordance with the DTC CHART.) A
    OK: (When troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE.) B
    NG C
  10. B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
  11. C: REPAIR OR REPLACE HARNESS OR CONNECTOR 
  12. A: END 
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