Lexus IS250 · Service Manual BODY

HOW TO PROCEED WITH TROUBLESHOOTING

Troubleshooting

Use these procedures to troubleshoot the rear sunshade system.

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

    1. Refer to the problem symptoms table (Click here).

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


    		B.
    A

    5.OVERALL ANALYSIS AND TROUBLESHOOTING

    1. Terminals of ECU (Click here)

    2. Circuit Inspection (Click here, Click here)

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    6.REPAIR OR REPLACE
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      7.CONFIRMATION TEST
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