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Home >> Lexus >> 2002 >> ES 300 >> Repair and Diagnosis >> Body & Frame >> Power Windows >> System Tests >> Test A: Power Window Cannot Be Operated By Operation Interlocked With Key (Only Driver's Door) >> Circuit Description

Circuit Description

NOTE: The power window system uses a large-scale body multiplex communications system. First of all, confirm the communication function and check that there is no abnormality in the communication system. Also if the power window system has a malfunction in the jam protection function, the power window AUTO operations are prohibited. Confirm the diagnosis code.

When the driver's door is held in the locking state for 2.5 seconds or more via the key operation with no key inserted in the ignition switch, the driver door ECU drives the power window motor at the same time when a signal is transmitted multiply to the passenger door ECU and body ECU. Then the passenger door ECU drives the power window motor and the body ECU is transmitted multiply to the rear left hand and right hand power window regulator switch, then the rear left hand power window regulator switch drives the left hand power window motor, the right hand rear power window regulator switch drives and the right hand power window motor.

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