2012 Infiniti M37 BaseFACTORY OEM SERVICE PROCEDURE

SIGNAL BUFFER SYSTEM: System Description

WARNING: This page is about a different car, the 2013 Infiniti M56 and 2013 Infiniti M37. However, it is still accessible from the selected car via links, so may be relevant.
  • IPDM E/R reads the status of the oil pressure switch and transmits the oil pressure switch signal to BCM via CAN communication (only for models with VQ37VHR engine). Refer to "OIL PRESSURE WARNING LAMP: SYSTEM DIAGRAM ".
  • IPDM E/R reads the status of the hood switch and transmits the hood switch signal to BCM via CAN communication. Refer to "HOOD SWITCH ".
  • IPDM E/R receives the rear window defogger control signal from BCM via CAN communication and transmits it to ECM and AV control unit via CAN communication. Refer to "SYSTEM DIAGRAM ".
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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