E.C.C. Description (Models with catalyzer)
EF & EC-30prose procedureModels with catalyzer. Crank angle sensor and boost pressure sensor are input signals only on models with E.G.R. (*1); vacuum switch is an input only on models without E.G.R. (*2).
General Description
The carburetor is equipped with an air-fuel ratio control on-off valve instead of a power valve. This on-off valve opens or closes the compensating air bleed and main jet to compensate for rich/lean air-fuel ratio, depending on varying conditions, such as acceleration, deceleration, low coolant temperature, low voltage, etc. These varying conditions are detected by various sensors which transmit corresponding signals to provide air-fuel ratio compensation.
E.C.C. Control Unit Input Signals
1
Input signalEngine temperature sensor
2
Input signalExhaust gas sensor
3
Input signalThrottle valve switch
4
Input signalCrank angle sensor *1
5
Input signalBoost pressure sensor *1
6
Input signalNeutral & clutch switch
7
Input signalVehicle speed sensor
8
Input signalIgnition switch (start signal)
9
Input signalVacuum switch *2
NOTE
*1 Models with E.G.R. *2 Models without E.G.R.