Description

Infinity FX35, FX50 2009 Technical Manual – Body Control System Electrical

If you’re chasing an electrical gremlin in a 2009 Infinity FX35 or FX50, the first thing I’ll tell you is to stop guessing and get the factory documentation. I’ve seen too many techs burn hours on body control module diagnostics because they didn’t have the right configuration data. This Infinity FX35, FX50 2009 Technical Manual is the original OEM document from Nissan – 83 pages covering exactly what the dealer techs use. No aftermarket interpretation, no missing steps.

Why OEM Documentation Beats Aftermarket Reprints

This manual comes directly from the Infiniti parts system. The CONFIGURATION (BCM) section on page 3 gives the special repair requirement for replacing the control unit. Aftermarket manuals leave that out. You follow this, you won’t have to redo the job. You skip it, you’ll be pulling the BCM again.

BCM Configuration and Special Repair Requirement (Page 4-5)

Page 4 details the Special Repair Requirement for CONFIGURATION (BCM). That’s the exact procedure you need to initialize the new BCM after a swap. Page 5 has the Configuration list – a table of what settings must be programmed. Without this list, the replacement BCM won’t talk to the Intelligent Key system or the combination switch. I’ve had to fix two cars where a shop swapped a BCM without config data – both came back with no-door-lock and no-interior-lamp issues. This manual prevents that.

System Descriptions: Door Locks, Wiper, Headlamp, and More

The SYSTEM DESCRIPTION section starts on page 6 with the Body Control System overview. It breaks down the COMBINATION SWITCH READING SYSTEM (page 8), SIGNAL BUFFER SYSTEM (page 12), and POWER CONSUMPTION CONTROL SYSTEM (page 13). Each subsystem has a system diagram and component parts location. If you need to trace a failure in the REAR WINDOW DEFOGGER or the BUZZER circuit, the DIAGNOSIS SYSTEM (BCM) chapter from page 16 onward gives you the CONSULT-III Function trees for every subsystem: DOOR LOCK, HEADLAMP, WIPER, FLASHER, INTELLIGENT KEY, COMB SW, IMMU, and BATTERY SAVER. That’s 11 individual diagnostic function blocks. You can pinpoint the issue without swapping parts.

Diagnose the BCM with CONSULT-III Functions

CONSULT-III is the dealer-level scan tool. This manual tells you exactly which function to select for each symptom. For example, if the interior lamps don’t work, you go to INT LAMP on page 19. If the battery keeps draining, you check BATTERY SAVER on page 29. The manual provides the data list and active test procedures. You don’t need to guess which parameter to monitor – it’s spelled out. This is the difference between a two-hour diagnosis and a thirty-minute one.

Who Needs This 2009 Infinity Technical Manual?

If you own a 2009 FX35 or FX50 and plan to do any electrical work yourself, this is the only document you should trust. Professional mechanics working on these models will save billable time by having the factory CONFIGURATION list in hand. The manual is also useful for shops that specialize in Infiniti electrical repairs – it covers the entire Body Control System in 83 pages. Factory-specific diagrams, not generic colors. It’s specific to the FX platform.

For related electrical system coverage on similar platforms, see the Infinity G35 Coupe 2003 Lighting System Service Manual. For engine mechanical work, you might want the 2003 G35 Coupe Engine Mechanical Service Manual. And if you work on heavy equipment as well, there’s the Drogobych Crane КТА-16, КТА-25, КТА-28 2004 Installation Manual. But for the FX35/FX50 body control, this is it.

83 Pages of Factory Electrical Diagnostics

Every page is scanned from original Infiniti documentation. You get the wiring diagrams, component locations, and step-by-step inspection procedures. This isn’t a compilation – it’s the exact manual Infiniti technicians used when the car was new. The 2009 model year had unique BCM firmware; later manuals won’t match. Having the correct year is critical.

While this manual focuses on the body control system, other vehicle systems like the Manual Transmission are documented in separate factory manuals. If you’re tackling a full restoration or major electrical overhaul, you’ll need both. Check out the Manual Transmission manual for drivetrain specs.

That’s the factory difference.

Does this manual cover the entire vehicle?

No. This is the BODY CONTROL SYSTEM technical manual only – 83 pages specific to electrical and power control. It does not cover engine, transmission, or HVAC. You need separate manuals for those systems.

What is the CONFIGURATION (BCM) section?

It’s the procedure and list for programming a replacement Body Control Module. Without this, the new BCM won’t match the vehicle’s options. The manual includes the Configuration list on page 5.

Can I use this manual for a 2010 FX35?

No. The 2009 manual is specific to that model year. Electrical systems change year to year. Always get the manual for your exact model year.

Is this a reprint or a digital copy?

This is a high-resolution digital scan of the original factory manual. Not a reprint. It’s the same document Infiniti dealerships used.

Don’t waste time with aftermarket manuals that skip the critical configuration data. Get the factory document directly. Access the Factory Manual and have the correct torque specs, diagnostic trees, and BCM programming steps right on your screen. Your FX35 or FX50 will thank you.