Engine Control Module

2003 Infiniti FX45SECTION Engine Control Module

The Engine Control Module (ECM) consists of a microcomputer, connectors and wiring for voltage signal input/output and power supply. The unit is not serviceable and should not be opened. The ECM contains memory and logic circuits, enabling it to interpret sensor inputs and control various engine systems. To locate ECM, see ECM LOCATIONS  table.

ECM LOCATIONS

Application Location
All Models Behind Glove Box
NOTE: Components are grouped into 2 categories. The first category is INPUT DEVICES , which are components that control or produce voltage signals monitored by the ECM. The second category is OUTPUT SIGNALS , which are components controlled by the ECM.
RENDER: 1.0x

NO RELATED

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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.