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.
2008 Infiniti M45 BaseFACTORY OEM SERVICE PROCEDURE
Automatic Transmission
- Index For DTC
- Precautions
- Preparation
- A/T Fluid
- A/T Control System
- Cross-Sectional View (VQ35DE Models for 2WD)
- Cross-Sectional View (VK45DE Models For 2WD)
- Cross-Sectional View (VQ35DE Models for AWD)
- Cross-Sectional View (VK45DE Models for AWD)
- Shift Mechanism
- TCM Function
- CAN Communication
- Input/Output Signal of TCM
- Line Pressure Control
- Shift Control
- Lock up Control
- Engine Brake Control
- Control Valve
- On Board Diagnostic (OBD) System
- Trouble Diagnosis
- DTC Inspection Priority Chart
- Fail-safe
- Notes
- Fail-Safe Function
- Notes
- Vehicle Speed Sensor
- Accelerator Pedal Position Sensor
- Throttle Position Sensor
- PNP Switch
- Starter Relay
- A/T Interlock
- A/T 1st Engine Braking
- Line Pressure Solenoid
- Torque Converter Clutch Solenoid
- Low Coast Brake Solenoid
- Input Clutch Solenoid
- Direct Clutch Solenoid
- Front Brake Solenoid
- High and Low Reverse Clutch Solenoid
- Turbine Revolution Sensor 1 or 2
- How to Perform Trouble Diagnosis for Quick and Accurate Repair
- A/T Electrical Parts Location
- Circuit Diagram
- Inspections before Trouble Diagnosis
- Check before Engine Is Started
- Check at Idle
- Cruise Test - Part 1
- Cruise Test - Part 2
- Cruise Test - Part 3
- Vehicle Speed at Which Gear Shifting Occurs
- Vehicle Speed at Which Lock-Up Occurs/Releases
- Symptom Chart
- TCM Input/Output Signal Reference Values
- CONSULT-III Function (TRANSMISSION)
- Diagnosis Procedure without CONSULT-III
- DTC U1000 Can Communication Line
- DTC P0615 Start Signal Circuit
- DTC P0700 TCM
- DTC P0705 Park/Neutral Position Switch
- DTC P0717 Turbine Revolution Sensor
- DTC P0720 Vehicle Speed Sensor A/T (Revolution Sensor)
- DTC P0725 Engine Speed Signal
- DTC P0731 A/T 1ST Gear Function
- DTC P0732 A/T 2ND Gear Function
- DTC P0733 A/T 3RD Gear Function
- DTC P0734 A/T 4TH Gear Function
- DTC P0735 A/T 5TH Gear Function
- DTC P0740 Torque Converter Clutch Solenoid Valve
- DTC P0744 A/T TCC S/V Function (Lock Up)
- DTC P0745 Line Pressure Solenoid Valve
- DTC P1705 Throttle Position Sensor
- DTC P1710 A/T Fluid Temperature Sensor Circuit
- DTC P1721 Vehicle Speed Sensor MTR
- DTC P1730 A/T Interlock
- DTC P1731 A/T 1ST Engine Braking
- DTC P1752 Input Clutch Solenoid Valve
- DTC P1754 Input Clutch Solenoid Valve Function
- DTC P1757 Front Brake Solenoid Valve
- DTC P1762 Direct Clutch Solenoid Valve
- DTC P1767 High And Low Reverse Clutch Solenoid Valve
- DTC P1772 Low Coast Brake Solenoid Valve
- DTC P1774 Low Coast Brake Solenoid Valve Function
- DTC P1815 Manual Mode Switch
- Main Power Supply And Ground Circuit
- Closed Throttle Position And Wide Open Throttle Position Circuit
- Brake Signal Circuit
- A/T Indicator Circuit
- Trouble Diagnosis For Symptoms
- Wiring Diagram - AT - NON DTC
- A/T CHECK Indicator Lamp Does Not Come On
- Engine Cannot Be Started in "P" or "N" Position
- In "P" Position, Vehicle Moves When Pushed
- In "N" Position, Vehicle Moves
- Large Shock ("N" to "D" Position)
- Vehicle Does Not Creep Backward in "R" Position
- Vehicle Does Not Creep Forward in "D" Position
- Vehicle Cannot Be Started from D1
- A/T Does Not Shift: D1 → D2
- A/T Does Not Shift: D2 → D3
- A/T Does Not Shift: D3 → D4
- A/T Does Not Shift: D4 → D5
- A/T Does Not Lock up
- A/T Does Not Hold Lock up Condition
- Lock up Is Not Released
- Engine Speed Does Not Return to Idle
- Cannot Be Changed to Manual Mode
- A/T Does Not Shift: 5th Gear → 4th Gear
- A/T Does Not Shift: 4th Gear → 3rd Gear
- A/T Does Not Shift: 3rd Gear → 2nd Gear
- A/T Does Not Shift: 2nd Gear → 1st Gear
- Vehicle Does Not Decelerate by Engine Brake
- Shift Control System
- A/T Shift Lock System
- On-Vehicle Service
- Air Breather Hose
- Transmission Assembly
- Overhaul
- Disassembly
- Repair For Component Parts
- Assembly
- Service Data And Specifications (SDS)
- General Specifications
- Vehicle Speed at Which Gear Shifting Occurs
- Vehicle Speed at Which Lock-Up Occurs/Releases
- Stall Speed
- Line Pressure
- A/T Fluid Temperature Sensor
- Turbine Revolution Sensor
- Vehicle Speed Sensor A/T (Revolution Sensor)
- Reverse Brake
- Total End Play
- Bearing Race For Adjusting Total End Play
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.