2012 Infiniti M37 xFACTORY OEM SERVICE PROCEDURE

Component Inspection (Ignition Coil with Power Transistor)

  1. CHECK IGNITION COIL WITH POWER TRANSISTOR-IΒ 
    1. Turn ignition switch OFF.
    2. Disconnect ignition coil harness connector.
    3. Check resistance between ignition coil terminals as per the following.
      Terminals Resistance (Ξ©) [at 25Β°C (77Β°F)]
      1 and 2 Except 0 or ∞
      1 and 3 Except 0
      2 and 3

      Is the inspection result normal?Β 

      YES: GO TO 2.

      NO: Replace malfunctioning ignition coil with power transistor. Refer to "EXPLODED VIEW ".

  2. CHECK IGNITION COIL WITH POWER TRANSISTOR-IIΒ 
    CAUTION: Perform the following procedure in a place where with no combustible objects and good ventilation.
    1. Turn ignition switch OFF.
    2. Reconnect all harness connectors disconnected.
    3. Remove fuel pump fuse (1) in IPDM E/R (2) to release fuel pressure.
      NOTE: Do not use CONSULT to release fuel pressure, or fuel pressure applies again during the following procedure.
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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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