2004 Infiniti Q45FACTORY OEM SERVICE PROCEDURE

ECM Terminals And Reference Value: Preparation

  1. ECM is located behind the glove box. For this inspection, remove glove box.
  2. Remove ECM harness protector.
    Fig 1: Locating ECM & TCM
    G00745056Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Perform all voltage measurements with the connector connected. Extend tester probe as shown to perform tests easily.
    • Open harness securing clip to make testing easier.
    • Use extreme care not to touch 2 pins at 1 time.
    • Data is for comparison and may not be exact.
Fig 2: Reducing tester probe size
G00745057Courtesy of NISSAN MOTOR CO., U.S.A.
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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