Technical data
i-
/
i
>’
COMPLETE CAR
TEST1
No.1
-
CHECK OF FUEL PUMP CONTROL
/
Check fuel’ system pressure.
‘,
.
Connect a pressure gauge to fuel
cir&t.
-
Try~a
prolonged starting and check
pressure presence between 2.8 bars
and
32
bars.
NOTE:
~
The pu’mp,must turn for a few seconds
even,
wjth
the key in the
“MARCIA”
run-
ning,
position.
l-
‘ES
Ohober
1988
YES
.
Check fuel
filter
and any possible
dUCt
throttlings.
YES
.
_:,
Check efficiency of pressure gauge.
i
.,
YES
v
Replace fuel-pump.
NO
During a starting, check + 12 V on fuel
NO
l pump terminals.
’
Check G4 Fuse (15 A)
1
TEST Na. 2
I
YES
w
1
Check circuit downstream ,from. relay
NO
S12a
up to ‘fuel pump, beginning from
terminal 87b of the same relay, and the
circuit of terminal 30 of the relay itself.
t--/
Check that fuel pump
rotates.
YES
I
YES
v
Check that negative terminal of pump is
at ground.
,
YES
v
-
Remove key.
-
Disconnect connecter of injection ECU
-
Put at ground pin 12 of the same con-
nectar.
-
Rotate key to RUN position.
.
Check that relay
S12a
is energized.
-
I
I
NO
v
Restore wiring.
L
4
Probable failure on ECU
Go on with diagnosis.
Eliminate ground connections on
12 ECU connecter.
Replace relay
S12a.
Check electrical circuits consisting of:
_
terminal 85 of relay S12b and ground
i
ov
_
terminal 86 of relay S12b and ground
= 12v
NO
Restore wiring of terminals 85 and 86
of relay
S12a.
00.3517
PA327900883301