Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLEXUS2012IS 250C V6-2.5L (4GR-FSE)REPAIR AND DIAGNOSISWINDOWS AND GLASSWINDOWSDESCRIPTION AND OPERATIONSYSTEM DESCRIPTION
2012 Lexus IS 250C V6-2.5L (4GR-FSE)
System Description
2012 Lexus IS 250C V6-2.5L (4GR-FSE)SECTION System Description
WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: SYSTEM DESCRIPTION
1. FUNCTION OF MAIN COMPONENTS
The power window control system consists of the following components:
*: for Front Door Windows
2. SYSTEM FUNCTION
The power window control system has the following functions:
* *1: w/ Occupant Classification System except Front Passenger Side
* *2: w/ Occupant Classification System
* *3: This function is set through the customize function, as it is off by default.
3. POWER WINDOW CONTROL OVERVIEW
Power Window Regulator Master Switch Assembly (Driver side window)
* o: Power window operates (with jam protection for front windows only).
* [Black Circle]: Power window operates (without jam protection).
* X: Power window operation prohibited
* *1: Jam protection will not operate if the driver door switch is held in the auto up position until the power window is fully closed. However, if the switch is held for 9.5 to 10.5 seconds and then released, auto up operation with jam protection will resume.
* *2: w/ Occupant Classification System
* *3: w/o Occupant Classification System
* *4: This function is set through the customize function, as it is off by default.
* The content in the square brackets indicates the operation when the window lock switch is on (locked). If an X is shown in square brackets, this indicates that this operation is prohibited when the lock switch is on.
Power Window Regulator Master Switch Assembly (Front passenger side window)
* o: Power window operates (with jam protection for front windows only).
* [Black Circle]: Power window operates (without jam protection).
* X: Power window operation prohibited
* The content in the square brackets indicates the operation when the window lock switch is on (locked). If an X is shown in square brackets, this indicates that this operation is prohibited when the lock switch is on.
* *1: w/ Front Passenger Door Auto Up Function
* *2: w/ Occupant Classification System
* *3: This function is set through the customize function, as it is off by default.
Power Window Regulator Master Switch Assembly (Rear seat windows)
* [Black Circle]: Power window operates (without jam protection).
* X: Power window operation prohibited
* The content in the square brackets indicates the operation when the window lock switch is on (locked). If an X is shown in square brackets, this indicates that this operation is prohibited when the lock switch is on.
* *1: w/ Occupant Classification System
* *2: This function is set through the customize function, as it is off by default.
Power Window Regulator Switch Assembly
* o: Power window operates (with jam protection for front windows only).
* [Black Circle]: Power window operates (without jam protection).
* X: Power window operation prohibited
* *1: Jam protection will not operate if the driver door switch is held in the auto up position until the power window is fully closed. However, if the switch is held for 9.5 to 10.5 seconds and then released, auto up operation with jam protection will resume.
* *2: w/ Front Passenger Door Auto Up Function
* *3: w/ Occupant Classification System
* *4: This function is set through the customize function, as it is off by default.
* The content in the square brackets indicates the operation when the window lock switch is on (locked). If an X is shown in square brackets, this indicates that this operation is prohibited when the lock switch is on.
4. VEHICLE CONDITION-LINKED CONTROL OVERVIEW
Power Window Regulator Master Switch Assembly (except Linked Operation)
* o: Power window operates (with jam protection for front windows only).
* [Black Circle]: Power window operates (without jam protection).
* X: Power window operation prohibited
Power Window Regulator Master Switch Assembly (for Linked Operation)
* o: Power window operates (with jam protection for front windows only).
* [Black Circle]: Power window operates (without jam protection).
* X: Power window operation prohibited
* *1: w/ Occupant Classification System
* *2: This function is set through the customize function, as it is off by default.
Power Window Regulator Switch Assembly (except Linked Operation)
* o: Power window operates (with jam protection for front windows only).
* [Black Circle]: Power window operates (without jam protection).
* X: Power window operation prohibited
Power Window Regulator Switch Assembly (for Linked Operation)
* o: Power window operates (with jam protection for front windows only).
* [Black Circle]: Power window operates (without jam protection).
* X: Power window operation prohibited
* *1: w/ Occupant Classification System
* *2: This function is set through the customize function, as it is off by default.
5. SWITCH LED ILLUMINATION CONTROL OVERVIEW
Power Window Regulator Master Switch Assembly
HINT
The window lock switch on (lock) status is shown in the brackets.
Power Window Regulator Switch Assembly
HINT
The window lock switch on (lock) status is shown in the brackets.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.