Fiat Bravo Service Manual page 162

Bravo-Brava A t
16v
Engine
Fuel system
10.
HEATING/VENTILATION SYSTEM MANAGEMENT
Rpm decreases when the air conditioner is turned on because the system compressor takes up power.
This involves a drop in rpm, which is particularly evident during idling.
To overcome this drawback, when the ECU is informed of air conditioner activation (pin 10) ahead of
compressor activation (pin 26), it increases the speed by adjusting the air flow by means of the step mo­
tor.
When a power requirement is identified (throttle position higher than a given threshold) the ECU in­
hibits air conditioner operation for a memorized time interval.
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1. Battery
2. Ignition switch
3. Fuse
4. Air conditioning system enablement re­
lay
5. Compressor electromagnetic coupling
supply relay
6. Compressor
7. Electronic injection-ignition control unit
8. Three stage pressure switch
9. Defrosting sensor
10. Air conditioner activation switch
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