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.
2003 Infiniti M45FACTORY OEM SERVICE PROCEDURE
Power Window System
- Power Window System
- Component Parts and Harness Connector Location
- System Description
- Manual Operation
- Auto Operation
- Power Window Lock
- Retained Power Operation
- Anti-Pinch System
- Power Window Control By The Key Cylinder Switch
- Schematic
- Wiring Diagram - WINDOW
- Terminals and Reference Value for BCM
- Terminals and Reference Value for Driver Door Control Unit
- Terminals and Reference Value for Passenger, Rear LH, RH Door Control Unit
- Trouble Diagnosis Symptom Chart
- Communication Signal Circuit Check
- Front Power Window Regulator Circuit Check (Driver Side)
- Front Power Window Regulator Circuit Check (Passenger Side)
- Rear Power Window Regulator LH or RH Circuit Check
- Limit Switch Check (Driver Side)
- Limit Switch Check (Passenger Side)
- Encoder Switch Check (Driver Side)
- Encoder Switch Check (Passenger Side)
- Driver Door Control Unit Circuit Check
- Passenger Door Control Unit Circuit Check
- Rear Door Control Unit (LH or RH) Circuit Check
- Door Switch Check
- Door Key Cylinder Switch Check
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.