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Home >> Lexus >> 2004 >> ES 330 >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System - Diagnostics >> Power Window Active Test (Driver's Door) >> Circuit Description
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Circuit Description

When the ignition switch is ON, the power window regulator master switch (driver's door ECU) monitors the signal via the power window regulator master switch and drives the power window motor.

NOTE: Power window system use a large-scale body multiplex communications. First of all, confirm the communication function depending on the "how to proceed with troubleshooting", and check that there is no abnormality in the communication system. Then finally proceed with the troubleshooting. Also, if the power window system has a malfunction in the jam protection function, the power window AUTO UP/DOWN does not operate and a diagnostic code is recorded. Confirm the diagnostic code before troubleshooting.
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