## NISSAN ELECTRONIC CONCENTRATED CONTROL (PORT FUEL INJECTION) SYSTEM (ECCS)

### General Information

The Nissan Electronic Concentrated Control System (ECCS) is an air flow controlled, port fuel injection and engine control system. The ECCS electronic control unit consists of a microcomputer, inspection lamps, a diagnostic mode selector and connectors for signal input and output and for power supply. The electronic control unit, or ECU, controls the following functions:

- Amount of injected fuel
- Ignition timing
- Mixture ratio feedback
- Pressure regulator control
- Exhaust Gas Recirculation (EGR) operation
- Idle speed control
- Fuel pump operation
- Air regulator control
- Air Injection Valve (AIV) operation
- Self-diagnostics
- Air flow meter self-cleaning control
- Fail safe system