LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2003 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 768 (Brakes - Abs With EBD & BA & TRAC & VSC (Diagnostics)) >> DTC C1340/47: Open Circuit In Center Differential Lock Signal (During Center Differential Lock On) >> 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 (EXI TERMINAL VOLTAGE) 
    1. Transfer is in 4WD mode (Multi Mode 4WD only).
    2. Disconnect the skid control ECU connector.
    3. Turn the ignition switch to the ON position.
    4. Measure the voltage according to the value(s) in the table below.

      Standard: 

      Fig 1: Inspecting Skid Control ECU (EXI Terminal Voltage)
      G02584585Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TESTER CONNECTION, CONDITION AND SPECIFIED CONDITION (1 OF 2)

      Tester Connection Condition Specified Condition
      S28-27 (EXI) - Body ground Center diff. locked Below 1 5 V
      S28-27 (EXI) Body ground Center diff. free 10 to 14 V
    1. NG: Go to step   3 
    2. OK: GO TO NEXT STEP 
  2. INSPECT SKID CONTROL ECU (NEO TERMINAL VOLTAGE) 
    Fig 2: Inspecting Skid Control ECU (NEO Terminal Voltage)
    G02584586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage according to the value(s) in the table below.

      Standard: 

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

      Tester Connection Condition Specified Condition
      S28-10 (NEO) - Body ground Center diff. locked Below 2 V
      S28-10 (NEO) - Body ground Center diff. free 10 to 14 V

      HINT:

      The center diff. lock indicator light comes on while the center differential is being switched to lock. Therefore, perform the measurement after confirming that the indicator light comes on and the center differential is actually locked by driving the vehicle.

    1. NG: Go to step   8 
    2. OK: GO TO NEXT STEP 

      Go to step   11 

  3. INSPECT CENTER DIFFERENTIAL LOCK SWITCH (GROUND TERMINAL CONTINUITY) 
    Fig 3: Identifying Center Differential Lock Switch Terminals
    G02584587Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the center diff. lock 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
      D4-4 - Body ground Below 1 Ω
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) 
    2. OK: GO TO NEXT STEP 
  4. INSPECT CENTER DIFFERENTIAL LOCK SWITCH 
    Fig 4: Inspecting Center Differential Lock Switch
    G02584588Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION, CONDITION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      D4-3 - D4-4 Switch is pushed in Below 1 Ω
      D4-3 - D4-4 Switch is not pushed in 10 kΩ or higher
    1. NG: REPLACE CENTER DIFFERENTIAL LOCK SWITCH 
    2. OK: GO TO NEXT STEP 
  5. INSPECT FOUR WHEEL DRIVE CONTROL ECU 
    1. Check the select high-low system (see INSPECTION ) or the select 2-4 and high-low system (INSPECTION ).
    1. NG: REPLACE FOUR WHEEL DRIVE CONTROL ECU 
    2. OK: GO TO NEXT STEP 
  6. CHECK HARNESS AND CONNECTOR (BETWEEN FOUR WHEEL DRIVE CONTROL ECU AND CENTER DIFFERENTIAL LOCK SWITCH) ( HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    1. Disconnect the 4WD control ECU (F9) connector and center diff. lock switch connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION (1 OF 4)

      Tester Connection Specified Condition
      F9-16 (DL) - D4-3 Below 1 Ω
      F9-16 (DL) - Body ground 10 kΩ or higher
      Fig 5: Identifying Connectors (Four Wheel Drive Control ECU And Center Differential Lock Switch)
      G02584589Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 
  7. 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 4)

      Tester Connection Specified Condition
      S28-27 (EXI) - F10-22 (P1) Below 1Ω
      S28-27 (EXI) - Body ground 10 kΩ or higher
      Fig 6: Identifying Connectors (Skid Control ECU And Four Wheel Drive Control ECU)
      G02584590Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 

      Go to step   11 

  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 (F9) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION (3 OF 4)

      Tester Connection Specified Condition
      S28-10 (NEO) - F9-20 (IND2) Below 1 Ω
      S28-10 (NEO) - Body ground 10 kΩ or higher
      Fig 7: Identifying Connectors (Skid Control ECU And Four Wheel Drive Control ECU)
      G02584591Courtesy 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 COMBINATION METER) ( HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    1. Disconnect the combination meter connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION (4 OF 4)

      Tester Connection Specified Condition
      S28-10 (NEO) - C11-6 Below 1 Ω
      S28-10 (NEO) - Body ground 10 kΩ or higher
      Fig 8: Identifying Connectors (Skid Control ECU And Combination Meter)
      G02584592Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 
  10. INSPECT COMBINATION METER ASSY 
    1. Check the combination meter system (see HOW TO PROCEED WITH TROUBLESHOOTING ).
    1. NG: REPLACE  COMBINATION METER ASSY 
    2. OK: GO TO NEXT STEP 
  11. 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  ) 
scientia non olet · About LEMON Manuals