2007 Infiniti M45FACTORY OEM SERVICE PROCEDURE

Components Function Description

COMPONENTS FUNCTION DESCRIPTION

Component parts Function
AWD control unit
  • Controls driving force distribution by signals from each sensor and switch from rear wheel driving mode (0:100) to AWD mode (50:50).
  • 2WD mode is available by fail-safe function if malfunction is detected in AWD system.
Wheel sensors Detects wheel speed.
AWD solenoid Controls electric controlled coupling by command current from AWD control unit.
Electric controlled coupling Transmits driving force to front final drive.
AWD warning lamp
  • Illuminates if malfunction is detected in electrical system of AWD system.
  • There is 1 blink in 2 seconds if rotation difference of front wheels and rear wheels is large.
  • There are 2 blinks in 1 second if load is still applied to driving parts.
ABS actuator and electric unit (control unit) Transmits the following signals via CAN communication to AWD control unit.
  • Vehicle speed signal
  • Stop lamp switch signal (brake signal)
ECM Transmits the following signals via CAN communication to AWD control unit.
  • Accelerator pedal position signal
  • Engine speed signal
Unified meter and A/C amp. Transmits conditions of parking brake switch via CAN communication to AWD control unit.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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