Lexus IS250 · Service Manual BODY

HOW TO PROCEED WITH TROUBLESHOOTING

Troubleshooting

HINT:
  1. Use the following procedures to troubleshoot the front power seat control system.

  1. *: Use the intelligent tester.

1.VEHICLE BROUGHT TO WORKSHOP
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    2.INSPECT BATTERY VOLTAGE

      Standard voltage:
      11 to 14 V

      If the voltage is below 11 V, recharge or replace the battery before proceeding.
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    3.INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)*

    1. Use the intelligent tester to check if the multiplex communication system (MPX) is functioning normally.

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


    		B.
    A

    4.PROBLEM SYMPTOMS TABLE

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


    		B.
    A

    5.OVERALL ANALYSIS AND TROUBLESHOOTING*

    1. DATA LIST / ACTIVE TEST (Click here)

    2. Terminals of ECU (Click here)

    3. Operation Check (Click here)

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    6.REPAIR OR REPLACE
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      7.CONFIRMATION TEST
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