Ford Corsar Repair Manual page 176

E.C.C.S. DESCRIPTION
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E.C.C.S. Components
I
CAZOE
I
Insulation bushing
SEF937B
EXHAUST GAS SENSOR
The exhaust gas sensor, which is located in the exhaust manifold,
monitors the density of oxygen in the exhaust gas. It consists of a
closed-end tube made of ceramic zirconia and'other components.
Porous platinum electrodes cover the tube's inner and outer sur-
faces. The closed-end of the tube is exposed to the exhaust gas in
the exhaust manifold. The outer surface of the tube contacts the
exhaust gas while the inner surface contacts the air.
AIR REGULATOR
Air regulator gives an air by-pass when the engine is cold for the pur-
pose of afast idle during warm-up. A bimetal, heater and rotary shut-
ter are built into the air regulator. When the bimetal temperature is
low, the air by-pass port is open. As the engine starts and electric
current flows through a heater, the bimetal begins to rotate the shut-
ter to close off the by-pass port. The air passage remains closed
until the engine is stopped and the bimetal temperature drops.
INHIBITOR SWITCH (A/T MODELS)
NEUTRAL SWITCH (M/T MODELS)
The inhibitor/neutral switch signals the E.C.M. when the transaxle
is in park or neutral (A/T) or neutral (M/T). This input is used for
I.A.C. control.
IGNITION SWITCH AND A/C SWITCH (WHERE FITTED)
Additional inputs to the E.C.M. are providedfrom the ignition switch
(start signal) and air conditioner switch (where fitted).
The start signal is used for fuel enrichment when starting, whilst the
air conditioner request signal is used by the E.C.M. to command the
air conditioner compressor.
BATTERY VOLTAGE
When the battery voltage is too low, the injector opening sp&ed is
slowed, thereby reducing the amount of fuel injected. The E.C.M.
will compensate for the battery voltage by extending the pulse dur-
ation accordingly.