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.
2007 Infiniti M45FACTORY OEM SERVICE PROCEDURE
Steering Control System
- EPS
- System Description
- Trouble Diagnosis
- How to Perform Trouble Diagnosis
- Component Parts Location
- Wiring Diagram - EPS -
- Control Unit Input/Output Signal Standard
- For Fast and Accurate Trouble Diagnosis
- Basic Inspection
- Inspection: Power Steering Control Unit Power Supply Circuit and Ground
- Symptom: The Steering Force Does Not Change Smoothly According to the Vehicle Speed
- RAS
- Rear Active Steer
- System Description
- Trouble Diagnosis
- How to Perform Trouble Diagnosis
- Component Parts Location
- Schematic
- Wiring Diagram - RAS -
- Control Unit Input/Output Signal Standard
- CONSULT-II Function (RAS/HICAS)
- Diagnosis Procedure with Self-Diagnosis Function (Without CONSULT-II)
- CAN Communication
- For Fast and Accurate Trouble Diagnosis
- Basic Inspection
- Trouble Diagnosis Chart
- Inspection 1: RAS Control Unit Malfunction
- Inspection 2: Motor Power Supply System
- Inspection 3: RAS Motor Output Malfunction
- Inspection 4: Vehicle Speed Signal
- Inspection 5: Steering Angle Signal Malfunction
- Inspection 6: Rear Main Signal and Rear Sub Signal Malfunction
- Inspection 7: VDC Malfunction
- Inspection 8: Engine Speed Signal Malfunction
- Inspection 9: CAN Communication System Malfunction
- Inspection 10: Stop Lamp Switch Harness
- Inspection 11: RAS Warning Lamp Harness
- Diagnosis Chart by Symptom 1
- Diagnosis Chart by Symptom 2
- Check RAS Static/Dynamic Characteristics
- Component Inspection
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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