How To Proceed With Troubleshooting [08/2015 - 08/2019]: Procedure

2018 Toyota 4Runner SR5, 4WDSECTION Procedure
  1. VEHICLE BROUGHT TO WORKSHOP 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  2

  2. INSPECT BATTERY VOLTAGE 

    Standard voltage

    11 to 14 V

    If the voltage is below 11 V, recharge or replace the battery before proceeding.

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  3

  3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
    1. Use the Techstream to check if the CAN communication system is functioning normally.

      Result

      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output B

    Result: 

    GO TO CAN COMMUNICATION SYSTEM 

    Refer to DIAGNOSIS SYSTEM [08/2015 - 08/2019]

    Result: 

    See step  4

  4. CHECK FOR DTC* 
    1. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
    2. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
    3. Recheck for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).

      Result

      Result Proceed to
      DTC is not output A
      DTC is output B

    Result: 

    See step  8

    Result: 

    See step  5

  5. PROBLEM SYMPTOMS TABLE 
    1. Refer to Problem Symptoms Table (Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] ).

      Result

      Result Proceed to
      Fault is not listed in problem symptoms table A
      Fault is listed in problem symptoms table B

    Result: 

    See step  8

    Result: 

    See step  6

  6. OVERALL ANALYSIS AND TROUBLESHOOTING* 
    1. Road Test (Refer to DATA LIST / ACTIVE TEST [08/2015 - 08/2019] ).
    2. Terminals of ECU (Refer to TERMINALS OF ECM [08/2015 - 08/2019] ).
    3. Data List / Active Test (Refer to DATA LIST / ACTIVE TEST [08/2015 - 08/2019] ).

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  7

  7. ADJUST, REPAIR OR REPLACE 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  8

  8. CONFIRMATION TEST 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    END 

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.