2012 Infiniti M37 BaseFACTORY OEM SERVICE PROCEDURE

Component Function Check

  1. CHECK ENGINE OIL TEMPERATURE (EOT) SENSOR 
    1. Turn ignition switch OFF.
    2. Disconnect EOT sensor harness connector.
    3. Remove EOT sensor. Refer to "EXPLODED VIEW ".
    4. Check resistance between EOT sensor terminals by heating with hot water as shown in the figure below.
      Terminals Condition Resistance (kΩ)
      1 and 2 Temperature [°C (°F)] 20 (68) 2.10 - 2.90
      50 (122) 0.68 - 1.00
      90 (194) 0.236 - 0.260
      Fig 1: Checking Engine Oil Temperature Sensor
      G08649217Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Proceed to "DIAGNOSIS PROCEDURE ".

  2. CHECK INTERMITTENT INCIDENT 

    Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Proceed to "DIAGNOSIS PROCEDURE ".

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.