Electric Electronic System; Injection Advance Control; Electronic Control Unit - Fiat Bravo Service Manual

Engine
Fuel system
10.
E L E C T R I C - E L E C T R O N I C S Y S T E M
The fuel system electric - electronic circuit comprises a wiring circuit, an electronic unit (control unit)
and the following sensors and actuators:
Rpm sensor
Coolant temperature sensor
Air f l o w meter (debimeter)
Intake air temperature sensor
Rpm / T D C
Accelerator
lever position
Coolant
temperature
ECU
Air
temperature
Injector
with controls
Atmospheric
pressure
8
P4A0SEJ01
Advance
actuator
control
solenoid
Bravo-Brava 1 0
Injector with controls
Accelerator lever position sensor
Fast idle control solenoid
Preheating control unit

Electronic control unit

The electronic control unit (ECU) is located
beneath the glove compartment (right hand
side) and is connected to the wiring by a 25
pin connector. This receives all the data on
engine service conditions transmitted by the
various sensors in addition to atmospheric
pressure information obtained by a sensor lo-
cated inside the control unit. The control unit
uses this data in conjunction w i t h specific
programs to implement the following operat-
ing strategies:

- injection advance control

- fast idle control
- exhaust gas recirculation
- g l o w plug pre/post heating control
- air conditioning system control
I N J E C T I O N ADVANCE C O N T R O L
The electronic control unit uses data on en-
gine rpm/TDC, accelerator lever position, air
and coolant temperature and atmospheric
pressure to calculate the optimal injection
advance. It compares this with the actual val-
ue transmitted by the injector w i t h controls
and adjusts the advance actuator control
solenoid when required.
TD
Publication no. 506.670/06