Entry And Start System How To Proceed With Troubleshooting

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20
Door Lock. Lexus Is250, Is220D. Gse20 Ale20

  1. VEHICLE BROUGHT TO WORKSHOP

  2. CUSTOMER PROBLEM ANALYSIS CHECK

  3. INSPECT BATTERY VOLTAGE

  4. INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)

  5. CHECK FOR DTC

  6. PROBLEM SYMPTOMS TABLE

  7. OVERALL ANALYSIS AND TROUBLESHOOTING

  8. REPAIR OR REPLACEMENT

  9. CONFIRMATION TEST

Entry And Start System -- How To Proceed With Troubleshooting


HINT:
  1. Use the following procedures to troubleshoot the entry and start system.
  2. The intelligent tester can be used in steps 4 and 6.
  3. When troubleshooting the entry and start system using the intelligent tester with the engine switch off, connect the intelligent tester to the vehicle and repeat turning any of the courtesy light switches on and off until communication between the tester and the vehicle begins (the interval ON and OFF should be less than 1.5 sec.).


1.VEHICLE BROUGHT TO WORKSHOP

    NEXT


    2.CUSTOMER PROBLEM ANALYSIS CHECK

      HINT:
      1. In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
      2. Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
      3. The following 5 items are important points in the problem analysis

      What
      		Vehicle model, system name
      When
      		Date, time, occurrence frequency
      Where
      		Road conditions
      Under what conditions?
      		Running conditions, driving conditions, weather conditions
      How did it happen?
      		Problem symptoms

    NEXT


    3.INSPECT BATTERY VOLTAGE
      Standard voltage:
      11 to 14 V
      If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

    NEXT


    4.INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)

    1. Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally (Click here).

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


    		B.
    Go to MULTIPLEX COMMUNICATION SYSTEM
    A


    5.CHECK FOR DTC

    1. Check for DTCs and note any codes that are output (Click here).

    2. Delete the DTCs.

    3. Recheck for DTCs.

      4. Result:
      Result
      		Proceed to
      DTC does not reoccur
      		A
      DTC reoccurs
      		B


    		B.
    GO TO DIAGNOSTIC TROUBLE CODE CHART
    A


    6.PROBLEM SYMPTOMS TABLE

      NEXT


      7.OVERALL ANALYSIS AND TROUBLESHOOTING

      1. On-vehicle inspection (Click here)

      2. DATA LIST/ACTIVE TEST (Click here)

      3. Terminals of ECU (Click here)


      NEXT


      8.REPAIR OR REPLACEMENT

        NEXT


        9.CONFIRMATION TEST

          NEXT

          END