Preliminary Checkings - Alfa Romeo 33 Workshop Manual

NO
circuit
p r e s s u r e presence between 2.8
bars and 3.2 bars.
NOTE:
,
The pump must turn for a few seFonds
even with the only key in the "MAR-
CIA"' running position.
TEST No. 1
NO
Check fuel filter and any possible duct
Check efficiency of pressure gauge.
Check circuit downstream from relay
terminal 87 of the same r,elay.
Eliminate ground connections on pin 12
Check G4 Fuse (15 Ohm)
Check that negative terminal of pump is
at ground.
Check that relay S1.2.a is energized.
Check that fuel pump rotates.
.
Probable failure on electronic CU.
Go on with diagnosis.
r 1
terminal 30 of relay S12.b and
ground = 12 V
terminal 85 of relay S12.b and
ground = 12 V
terminal 86 of relay S12.b and
ground = 12 V
terminal 87 of relay S12.b and
NO
S e a r c h f o r fauhin vehicle wiiing.