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Home >> Lexus >> 2016 >> GS 450h Base >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Engine Immobiliser System (Diagnostics - Introduction) >> Engine Immobilizer System >> How To Proceed With Troubleshooting [09/2014 - ] >> Procedure

How To Proceed With Troubleshooting [09/2014 - ]: Procedure

  1. VEHICLE BROUGHT TO WORKSHOP 

    Result

    Proceed to
    NEXT

    Result:  1

    NEXT 

    See step  2

  2. INSPECT AUXILIARY BATTERY VOLTAGE 
    1. Measure the auxiliary battery voltage.

      Standard Voltage

      11 to 14 V

      If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

      HINT: 

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

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  3

  3. TURN POWER SWITCH ON (IG) 

    HINT: 

    If the power 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:  1

    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.

      Refer to DIAGNOSIS SYSTEM [09/2014 - 10/2015] or DIAGNOSIS SYSTEM [10/2015 - ]

      Result

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

    Result:  2

    B 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 10/2015]  or  DIAGNOSTIC TROUBLE CODE CHART [10/2015 - ] 

    Result:  1

    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.

      Refer to DTC CHECK / CLEAR [09/2014 - ]

      Result

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

    Result:  2

    B 

    GO TO LIN COMMUNICATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2014 - ] 

    Result:  1

    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 [09/2014 - ] 

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

      Result

      Result Proceed to
      DTC is not output A
      Hybrid control system DTC is output B
      Steering lock system DTC is output C
      Engine immobilizer system DTC is output D

    Result:  2

    B 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 10/2015]  or  DIAGNOSTIC TROUBLE CODE CHART [10/2015 - 09/2016]  or  DIAGNOSTIC TROUBLE CODE CHART [09/2016 - ] 

    Result:  3

    C 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2014 - ] 

    Result:  6

    D 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2014 - ]  

    Result:  1

    A 

    See step  7

  7. PROBLEM SYMPTOMS TABLE 
    1. Refer to Problem Symptoms Table.

      PROBLEM SYMPTOMS TABLE [09/2014 - ] 

      Result

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

    Result:  2

    B 

    ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE 

    Result:  1

    A 

    See step  8

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

      Refer to DATA LIST / ACTIVE TEST [09/2014 - ] 

    2. Terminals of ECU

      Refer to TERMINALS OF ECU [09/2014 - 10/2015] or TERMINALS OF ECU [10/2015 - ] 

      Result

      Proceed to
      NEXT

    Result:  1

    NEXT 

    See step  9

  9. REPAIR OR REPLACE 

    Result

    Proceed to
    NEXT

    Result:  1

    NEXT 

    See step  10

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

      Refer to DTC CHECK / CLEAR [09/2014 - ] 

    2. Check for DTCs.

      Refer to DTC CHECK / CLEAR [09/2014 - ] 

      HINT: 

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

      Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2014 - ] 

      Result

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

    Result:  1

    A 

    END 

    Result:  2

    B 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2014 - ]