Check Of Fuel Pump Control - Alfa Romeo 33 Workshop Manual

Check fuel' system pressure.
.
pressure presence between 2.8 bars
and 32 bars.
NOTE: ~
The pu'mp,must turn for a few seconds
i
NO
l
' E S
TEST Na. 2
COMPLETE CAR
pump terminals.
.
Check fuel filter and any possible dUCt
throttlings.
.
Check efficiency of pressure gauge.
Replace fuel-pump.
Check circuit downstream ,from. relay
terminal 87b of the same relay, and the
circuit of terminal 30 of the relay itself.
NO
Restore wiring.
Eliminate ground connections on
12 ECU connecter.
Replace relay S12a.
NO
Check G4 Fuse (15 A)
Check that negative terminal of pump is
at ground.
, YES
i
.
Check that relay S12a is energized.
Probable failure on ECU
Go on with diagnosis.
Check electrical circuits consisting of:
terminal 85 of relay S12b and ground
terminal 86 of relay S12b and ground
NO
Restore wiring of terminals 85 and 86
of relay S12a.
1
P A 3 2 7 9 0 0 8 8 3 3 0 1