ECCS Control Unit
WARNING: This page is about a different car, the 1985 Nissan 200SX. However, it is still accessible from the selected car via links, so may be relevant.
The control unit is located on driver's side kick panel on 200SX Turbo. It is not serviceable and should not be opened. A monitor lamp is provided on lower side of unit so system operation can be checked. The control unit contains memory and logic circuits that enable it to interpret sensor inputs and control different engine systems.