Engine Control Module (Pcm)
PCM 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. PCM contains memory and logic circuits, enabling it to interpret sensor inputs and control various engine systems. To locate PCM, see PCM LOCATIONS table.
PCM LOCATIONS
| Application | Location |
|---|---|
| Altima, Sentra & 200SX | Under Dash Behind Center Console |
| Maxima | Behind Glove Box |
| Pathfinder, QX4 & Pickup | Under Passenger Seat |
| Quest | Behind Glove Box |
| 240SX | At Kick Panel Under Right Side Of Dash |
NOTE:
Components are grouped into 2 categories. First category is INPUT DEVICES, which are components that control or produce voltage signals monitored by the PCM. Second category is OUTPUT SIGNALS, which are components controlled by the PCM.