2012 Infiniti M35hFACTORY OEM SERVICE PROCEDURE

Component Description

Component Function
Pre-crush seat belt control unit (driver side)
  • Total control of pre-crash seat belt system is operated according to transmit signal.
  • Driver seat belt retractor integrates pre-crash seat belt control unit (driver side), driver seat belt motor, and tension reducer.
  • Seat belt motor operates each operation of pull, return, and hold.
Pre-crush seat belt control unit (passenger side)
  • Control of passenger pre-crash seat belt is operated according to transmit signal.
  • Passenger seat belt retractor integrates pre-crash seat belt control unit (driver seat), driver seat belt motor, and tension reducer.
  • Seat belt motor operates each operation of pull, return, and hold.
Stroke sensor It changes voltage according to brake pedal depressed amount and sends the signal to electrically-driven intelligent brake unit.
Seat belt buckle switch (driver side)
  • Fastening or not fastening of seat belt is judged. This judgment is used for control of driver pre-crash seat belt system.
  • Seat belt warning lamp on combination meter turns ON when seat belt is not fastened while ignition switch is ON.
  • The seat belt buckle switch is installed in the seat belt buckle.
Seat belt buckle switch (passenger side)
  • Fastening or not fastening of seat belt is judged. This judgment is used to control passenger pre-crash seat belt system.
  • Control of passenger seat tension reducer is operated by ON/OFF of seat belt buckle switch.
  • The seat belt buckle switch is installed in the seat belt buckle.
Combination meter
  • Transmits vehicle speed signal to pre-crash seat belt control unit (driver side).
  • Turns the seat belt warning lamp ON when the seat belt is unfastened.
ADAS control unit Intelligent brake assistance operation signal is received from ADAS control unit via CAN communication.
Steering angle sensor Steering angle sensor signal, steering angle speed signal, steering angle sensor neutral position adjustment completion signal, and steering angle sensor malfunction signal are received via CAN communication.
BCM Ignition ON signal, sleep/wake up signal, and door switch signal are received from BCM via CAN communication.
ABS actuator and electric unit (control unit) ABS operation signal is received from ABS actuator and electric unit (control unit) via CAN communication.
Electrically-driven intelligent brake unit Electrically-driven intelligent brake unit measures brake pedal depressed amount by stroke sensor, and then transmits brake pedal stroke sensor diagnosis signal and brake pedal stroke sensor voltage signal to pre-crush seat belt control unit (driver side) via CAN communication.
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:

  • • 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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