Engine Control Module
The Engine Control Module (ECM) consists of a microcomputer, diagnostic mode selector, connectors and wiring for voltage signal input, voltage signal output, and power supply. Unit is not serviceable and should not be opened. 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 |
|---|---|
| Altima & Quest | Behind Glove Box |
| Frontier, Maxima, Pathfinder & Xterra | Under Center Of Instrument Panel |
| Quest | Behind Glove Box |
| Sentra | Right Rear Of Engine Compartment, In ECM Box |