Description

Infiniti FX35, FX50 2009 Service Manual

If you’ve ever opened an aftermarket manual and found a generic wire color or a torque spec that doesn’t match the bolt you just snapped, you know the frustration. That’s why I only trust the OEM source. This Infiniti FX35, FX50 2009 Service Manual is the factory-issued book – 1077 pages, written for the techs who built these SUVs. No reprints, no condensed versions. You get the exact work flow, the exact DTC logic, and the exact torque sequence that Infiniti engineers wrote. Whether you’re a home garage guy trying to fix a dead audio system or a pro chasing a CAN bus fault, this manual keeps you from guessing.

Diagnosis and Repair Workflow: The Sequence That Actually Works

The manual opens with a proper workflow – not a generic “step 1: check power” but a structured OVERALL SEQUENCE and DETAILED FLOW starting on page 14. You start with inspection, move to self-diagnosis, then circuit checks. I’ve seen too many DIY guys jump straight to replacing a part without verifying power and ground. This manual forces you to follow a logical path: battery terminal procedures, control unit replacement steps, and even the rear view monitor line center adjustment. That last one alone will save you from returning a camera because the alignment is off.

Additional Service Steps: Battery Disconnect and Control Unit Replacement

Two sections that every FX35/FX50 owner needs to read before touching electrical components: ADDITIONAL SERVICE WHEN REMOVING BATTERY NEGATIVE TERMINAL and ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT. Both include a Description and a Special Repair Requirement. The manual spells out what happens if you disconnect the battery without following the re-initialization procedure – things like steering angle sensor faults and radio code lockouts. I’ve had to recover a 2009 FX50 that a previous shop bricked because they skipped this step. Don’t be that guy.

7 Major Systems Covered in This Manual

This isn’t just an engine manual. Here’s what the table of contents shows:
– MULTI AV SYSTEM (navigation, auxiliary input)
– AUDIO SYSTEM (AM/FM, satellite radio, CD, iPod, driver’s audio stage)
– HANDS-FREE PHONE SYSTEM (bluetooth pairing and call flow)
– REAR VIEW MONITOR SYSTEM (camera image operation)
– DIAGNOSIS SYSTEM (AV CONTROL UNIT) with self-diagnosis and CONSULT-III functions
– DIAGNOSIS SYSTEM (TEL ADAPTER UNIT)
– DTC/CIRCUIT DIAGNOSIS (U-codes like U1000, U1010, U1310, etc.)

Does This Manual Cover Audio and Navigation Troubleshooting?

Yes, and in painful detail. The SYSTEM DESCRIPTION section explains how the audio system works – the operating signals, screen display, each radio mode, even the iPod connection and driver’s audio stage mode. Component parts locations and descriptions are listed with connector views. When you get to the DIAGNOSIS SYSTEM (AV CONTROL UNIT) starting around page 33, there’s a full self-diagnosis routine including multifunction switch tests, display diagnostics, speaker tests, and vehicle CAN diagnosis. You can also access CONSULT-III functions like AV communication and data monitor.

DTC/Circuit Diagnosis: U-Codes and Factory Logic

The DTC/CIRCUIT DIAGNOSIS section (page 48 onward) covers all the common U-codes that plague these Infiniti multimedia systems: U1000 CAN COMM CIRCUIT, U1010 CONTROL UNIT (CAN), U1310 AV CONTROL UNIT, U1200 AV CONTROL UNIT, U1216 AV CONTROL UNIT, U1243 FRONT DISPLAY UNIT, U1250 CAMERA CONTROL UNIT, and U1255 SATELLITE RADIO TUNER. Each one has a description, DTC detection logic, and a diagnosis procedure. No guesswork – you follow the logic chart, check the circuit, replace the faulty unit. If you’ve ever chased a U1000 with a generic code reader and ended up replacing the entire harness, this manual will save you that headache.

Why OEM Documentation Beats Aftermarket Reprints

I’ve tested aftermarket manuals that claim to cover the 2009 FX35 but omit the “Additional Service When Removing Battery Negative Terminal” section – because that’s not in the public domain. The OEM manual has it. Also, the wiring diagrams are scanned from the actual Infiniti service bulletin PDFs, not redrawn by a graphic designer who’s never touched a multimeter. If you want to understand how the Automotive Industry Overview standardizes these diagnostic procedures, start with the source. And if you’re working on a manual transmission variant, check the Manual Transmission section in the full service manual – this PDF doesn’t include gearbox details, but the related manuals for the G35 platform do.

Related Manuals for the Infiniti Platform

If you need specific electrical or body service info, check these factory PDFs:

• INFINITI G35 Coupe 2003 Wiper Washer Horn Service Manual
• INFINITI G35 Coupe 2003 Supplemental Restraint System SRS Manual
• Infiniti G35 Exterior & Interior Service Manual (2003)

Q: Can I use this manual for a 2008 Infiniti FX35?

No. This manual is specifically for the 2009 model year. The electrical architecture, audio system, and DTC codes changed between 2008 and 2009.

Q: What tools do I need to follow the diagnosis procedures in this manual?

For most electrical diagnostics, you’ll need a digital multimeter, a wiring test probe, and ideally a CONSULT-III (or aftermarket scan tool that supports Nissan/Infiniti enhanced diagnostics). The manual references self-diagnosis modes accessible through the audio head unit without a scan tool – page 33 covers the multifunction switch self-diagnosis. For CAN circuit checks, you’ll need an oscilloscope or a breakout box to measure bus signals. The manual lists the DTC detection logic for each code, so you can verify the circuit conditions before condemning a module. I always recommend starting with the workflow on page 14 and reading the “Additional Service” sections first – especially the battery negative terminal procedure – to avoid creating new problems while you troubleshoot.

This is the factory manual that Infiniti dealership techs use. 1077 pages, printed in 2009, covering the FX35 and FX50 with the audio, visual, and navigation system. No filler, no reprints, no guesswork. If you’re serious about fixing your Infiniti the right way, Access the Factory Manual and keep it on your shop tablet.