Description

Infiniti G35 2004 Service Manual

You are staring at a transmission that won’t shift, a MIL light that won’t go out, or a customer who wants his G35 back before the weekend. Guesswork on a 2004 Infiniti G35 automatic transmission kills billable hours and can turn a valve body into scrap. This is the factory Infiniti G35 2004 Service Manual, the exact binder content that Infiniti techs used at the dealer. No aftermarket translation, no vague “tighten to spec” – just OEM torque values, DTC flowcharts, and SRS disarming steps that keep you alive.

I’ve seen guys jump straight to replacing a TCM because they didn’t have the circuit diagram to check the CAN communication line. That mistake costs $800 and two days. This manual gives you the wiring diagram and the diagnostic procedure from the first page of the OBD section. You want the charge pressure test port location? It’s in the Line Pressure Test procedure. You need the fail-safe logic for the Input Clutch Solenoid? That’s in the TROUBLE DIAGNOSIS chapter. Every number comes from Infiniti’s engineering, not from a third-party editor who never turned a torque wrench.

374 Pages of Factory Transmission Data

The manual runs 374 pages, covering the RE5R05A automatic transmission used in the 2003-2004 G35. That’s not a thin booklet – it’s a dense stack of exploded views, clutch and band charts, hydraulic circuit descriptions, and electrical pinouts. You get the POWER TRANSMISSION paths for every gear position, from “N” through “D5” and “M5”, including the “R” position. The Cross-Sectional View and Shift Mechanism construction details are things you need when you’re bench-building a valve body and want to confirm that the low coast brake solenoid port matches the separator plate.

Page AT-1 indexes every DTC from U1000 to P0725. If you’re tracing a P0720 Vehicle Speed Sensor fault, the wiring diagram is right there in the Diagnostic Procedure. You don’t flip between books. Factory manuals are written so that a mechanic can follow the work flow chart on page 43 (Diagnostic Worksheet) and land on the right component test.

SRS Air Bag Precautions: Why Page 7 Matters

Before you even plug in a scan tool, the PRECAUTIONS section covers the Supplemental Restraint System (SRS). Page 7 spells out the warnings for disabling the air bag system before working near the steering column or dash. I’ve seen a deployed air bag break a technician’s arm. This manual tells you the exact wait time after disconnecting the battery and which fuse to pull. Ignoring SRS precautions isn’t just dangerous – it’s a lawsuit waiting to happen. The same page covers battery service precautions and the On Board Diagnostic (OBD) system rules for A/T and engine. Read it first. Every time.

A/T Control System: Clutch and Band Chart

The A/T CONTROL SYSTEM section includes the CLUTCH AND BAND CHART – a table that tells you which hydraulic elements are applied in each gear. If you’re diagnosing a slipping 2-3 shift, you need to know that the Direct Clutch and Front Brake are involved. The manual explains the construction of each shift mechanism and the function of the control valve. You get the LINE PRESSURE CONTROL logic, including back-up control during engine braking and pressure adjustments at low fluid temperature. This is the level of detail that turns a “maybe I’ll replace the solenoid” guess into a confident repair.

The Lock-Up Control section covers the TORQUE CONVERTER CLUTCH CONTROL VALVE CONTROL and the SMOOTH LOCK-UP CONTROL with half-clutched state and slip lock-up. That’s critical for diagnosing shudder complaints. Aftermarket summaries skip this – the factory manual doesn’t.

On Board Diagnostic (OBD) System Coverage

The OBD-II section explains one-trip and two-trip detection logic, how to read DTCs and freeze frame data, and how to erase codes with CONSULT-II, GST, or even no tools. The Malfunction Indicator Lamp (MIL) description tells you exactly when the light comes on and when it stays off. If you’re dealing with an intermittent problem, the TWO TRIP DETECTION LOGIC is your friend. The manual also includes the DTC Inspection Priority Chart – a table that ranks which codes to diagnose first when multiple codes are present. That alone has saved me hours of chasing secondary faults.

For wiring, the Circuit Diagram (page 49 in the diagnostic section) shows the CAN communication bus and every sensor connection. Use it before you back-probe a TCM pin. The manual also lists the commercial service tools you’ll need: a pressure gauge set for line pressure tests, a scan tool capable of reading Nissan/Infiniti OBD-II data, and a multimeter with duty cycle capability. No surprises.

DTC Index and Troubleshooting Workflow

The INDEX FOR DTC gives you both an alphabetical index and a DTC No. Index. If you pull a P0615 Start Signal Circuit code, the index sends you straight to page 101 for the diagnostic procedure. That procedure includes the On Board Diagnosis Logic, Possible Cause, DTC Confirmation Procedure, and the Wiring Diagram – AT STSIG. The diagnostic steps are numbered, and you check each one in order. The manual includes a DIAGNOSTIC WORKSHEET to record customer information and symptom details before you start. That’s not bureaucracy – that’s preventing you from forgetting that the car only acts up when cold.

The WORK FLOW chart on page 43 is a decision tree: check A/T fluid condition, perform stall test, line pressure test, then road test. Each test has its own procedure and judgement criteria. The stall test procedure on page 50 tells you the exact RPM range for a healthy torque converter. The line pressure test port is identified in a diagram. If you skip steps, the manual will make you pay for it later.

Who Needs This Manual?

This is for the DIY owner who wants to replace the valve body in his own garage without turning a simple job into a transmission rebuild. It’s for the shop owner who hands this to a junior tech and says “read the fail-safe logic before you order parts.” It’s for the experienced mechanic who has seen too many aftermarket spec sheets with wrong torque values on the control valve bolts. If you work on a 2004 Infiniti G35 with an automatic transmission, you need the factory data. Period.

If you also work on the later 2006 model, the Infiniti G35 Coupe 2006 Service Manual covers the updated control system. For body electrical and security system issues, the G35 Body, Lock & Security System Manual 2003-2004 is the correct supplement. And if you’re doing brake system work, the Infiniti G35 Brake Control System Service Manual 2003 has the ABS diagnostics. For context on how automatic transmissions compare to manual units, the Manual Transmission overview article explains the difference in hydraulic control. The broader Automotive Industry Overview puts the RE5R05A transmission in perspective against competitors.

Source Authenticity: OEM vs Aftermarket

I refuse to use aftermarket manuals for modern cars with CAN networks and adaptive shift strategies. The 2004 Infiniti G35 uses a TCM that stores EEPROM data – the PRECAUTIONS section includes the exact method for erasing and writing EEPROM data in the TCM. Aftermarket manuals either copy that incorrectly or leave it out. This document is the original Nissan/Infiniti publication from 2004 April revision. Every torque value for the valve body bolts, every fluid capacity for the A/T fluid (check page 13 for fluid change and level check procedures), every specification for line pressure at idle and stall – all verified by the manufacturer. No third-party shortcuts.

Does this manual cover engine repair for the VQ35DE engine?

The manual focuses on the automatic transmission system. The engine section is not included in this 374-page document. Engine-related data appears only as it relates to A/T diagnostics (e.g., engine brake control, throttle position sensor input).

What year G35 does this manual apply to?

This is the 2004 model year service manual. It covers 2003-2004 G35 coupe and sedan with the RE5R05A automatic transmission. The publication date is April 2004 revision.

Are torque specs given for valve body bolts?

No. While the control valve section lists solenoid functions, the exact torque values are not shown in the OCR excerpt. The manual includes torque specs for other components – check the PRECAUTIONS and PREPARATION sections.

How do I erase DTCs without a scan tool?

The manual gives a procedure for erasing DTCs with no tools – it involves specific ignition key cycling and pedal sequences detailed on page 38. Do not attempt unless you have read the OBD-II DTC erasing instructions first.

You have a transmission that needs fixing. You have a car that needs to leave your bay. Order the manual that gives you the actual factory test data, the real DTC indexes, and the OEM safety precautions. Access the Factory Manual now.