Fiat Brava Service Manual page 328

Bravo-Brava
Electrical system
Fiat CODE
55.
KEY
ACCELERATOR
PEDAL
POSITIVE
RESULT _ l
®
4 s
<D s iXj
r
_u_
I
!
®
4 s
®
I
IGN.ON
IGN.OFF
PRESSED
RELEASED
FUEL INJECTION
WARNING 150 ms
LIGHT
NEGATIVE
RESULT
1,6 Hz
SOSdx O N
OFF
ON
OFF
P4A075L01
NOTE The diagram illustrates the actions on the accelerator pedal and the lighting up of the fuel injec­
tion fault warning light relating to an example code 42173 (Electronic Code)
This procedure makes it possible to start the engine only once, but it can be repeated an unlimited num­
ber of times.
H r a After the code has been acquired, the electronic control unit permits engine starting for a period
Xmmm of 10 minutes, after which it returns to the blocked starting status.
I M P O R T A N T NOTES CONCERNING THE REPLACEMENT OF COMPONENTS OF THE F I ­
AT CODE SYSTEM
The Fiat CODE system consists of various components connected to each other. Care should be taken
when working on and replacing one of these parts.
Engine control unit
n n Under no circumstances may engine control units be exchanged between cars to check
E J 3 whether they are working.
| M H During diagnosis, before replacing the engine control unit, make sure that the component un-
'AJR der examination really is faulty, because when the the new control unit is supplied, the Master
Code is memorized rendering it entirely unusable on other cars.
Fiat CODE control unit
Replacing the Fiat CODE control unit entails the rememorization of the electronic keys follow­
ing the "Key memorization with unused system"procedure.
Notches kits and new keys
■ M If the ignition switch block has to be replaced, remove the transponder from the old MASTER
p M l ^ key and insert it in the new key (see next page), then carry out the "Key memorization proce-
■ ^ " " dure for used Fiat CODE and electronic fuel injection control units".
Copyright Fiat Auto
75