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Home >> Lexus >> 2021 >> GX 460 Base >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Engine Immobilizer System (Diagnostics - Introduction) >> Engine Immobiliser System >> How To Proceed With Troubleshooting [08/2015 - 08/2019] >> Procedure

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

    HINT: 

    A simple method to determine whether the battery is depleted is to operate the horn.

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  3

  3. TURN ENGINE SWITCH ON (IG) 

    HINT: 

    If the engine switch cannot be turned on (IG), communication with the Techstream can be confirmed by connecting the Techstream to the vehicle and turning a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins.

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  4

  4. 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: 

    B 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] 

    Result: 

    A 

    See step  5

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

      Result

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

    Result: 

    B 

    GO TO LIN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] 

    Result: 

    A 

    See step  6

  6. CHECK FOR DTC* 
    1. Check for DTCs and make a note of any codes that are output.

      Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] 

    2. Based on the DTCs output above, proceed to each diagnostic procedure.

      Result

      Result Proceed to
      DTC is not output A
      SFI system DTC is output B
      Steering lock system DTC is output C
      Engine immobiliser system DTC is output D

    Result: 

    B 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2016]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2016 - 08/2017]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2017 - 08/2019] 

    Result: 

    C 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019] 

    Result: 

    D 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019]  

    Result: 

    A 

    See step  7

  7. 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: 

    B 

    See step  9

    Result: 

    A 

    See step  8

  8. OVERALL ANALYSIS AND TROUBLESHOOTING* 
    1. Check Data List / Active Test.

      Refer to DATA LIST / ACTIVE TEST [08/2015 - 08/2019] 

    2. Check Terminals of ECU.

      Refer to TERMINALS OF ECU [08/2015 - 08/2019] 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  9

  9. REPAIR OR REPLACE 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  10

  10. CHECK FOR DTC* 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] 

    2. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] 

      HINT: 

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

      Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019] 

      Result

      Result Proceed to
      DTC is not output A
      Engine immobiliser system DTC is output B

    Result: 

    A 

    END 

    Result: 

    B 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019]