Fiat 1996 Brava Service Manual page 444

Engine
Fuel system
Bravo- Brava @ *»
1998 range
10.
THROTTLE BODY
The throttle body meters the quantity of air drawn in by the engine (and consequently the power devel­
oped) according to the driver's request via the accelerator.
The throttle body is secured to the intake manifold by four bolts: the butterfly is opened by means of link­
age where small butterfly opening angles correspond to the pedal being slightly pressed and large angles
correspond to it being greatly depressed.
With the pedal completely released (engine decelerating or idling) the necessary additional air is supplied
by the engine idle adjustment actuator: under these circumstances, the throttle opening lever is in the end
of travel position against an anti-tamper screw which prevents the throttle from getting stuck in a closed
position.
To prevent condensation and ice formation that could arise during certain exterior conditions, i.e. low
temperature and/or high humidity, the throttle body is heated by recycling a small amount of coolant from
the engine thermostat through a chamber inside the body.
The throttle valve position sensor and engine idle speed actuator are fitted to the throttle body.
In the pre-modification version, the engine idle actuator and throttle valve position sensor are bolted to the
throttle body. In the post-modification version, they are built into the throttle body.
The anti-tamper screw is
adjusted by flushing in
the factor and should
never be tampered with.
1. Engine coolant delivery pipe attachment
2. Engine coolant return pipe attachment
3. Engine idle speed actuator bolted to the throttle body (pre-modification solution)
4. Throttle valve position sensor bolted to the throttle body (pre-modification solution)
5. Throttle valve
6. Throttle opening linkage
7. Throttle valve adjustment and antitamper screw (do not tamper with)
8. Engine idle speed actuator built into the throttle body (post-modification solution)
9. Throttle valve position sensor built into the throttle body (post-modification sensor)
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Print n° 506.670/21