Front Power Seat Control System (W/ Seat Position Memory System) - How To Proceed With Troubleshooting

Lexus IS250 IS220d GSE20 ALE20 - SEAT


FRONT POWER SEAT CONTROL SYSTEM (w/ Seat Position Memory System) - HOW TO PROCEED WITH TROUBLESHOOTING

  • HINT:
Use the following procedures to troubleshoot the front power seat control system.
*: 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)*

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

  • Result:
  • ResultProceed to
    MPX DTC is not outputA
    MPX DTC is outputB
B.
Go to MULTIPLEX COMMUNICATION SYSTEM
A
4.PROBLEM SYMPTOMS TABLE
  • Result:
  • ResultProceed to
    Fault is not listed in problem symptoms tableA
    Fault is listed in problem symptoms tableB
B.
Go to step 6
A
5.OVERALL ANALYSIS AND TROUBLESHOOTING*

DATA LIST / ACTIVE TEST

Terminals of ECU

Operation Check

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6.REPAIR OR REPLACE
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7.CONFIRMATION TEST
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END