Fuel injection
9 - 53
9
Resistive check
Disconnect the pump support connector. Using a tester
measure the resistance of the pump windings.
Connect the tester prods to the pump support pins as
shown in the figure.
Resistance = ~1.5
Ω
On meeting with infinite resistance replace the pump.
With infinite resistance, the pump will not turn.
With resistance close to 0 W the pump absorbs exces-
sively with the possibility that the 10 A fuse n° 2 will burn
out. Proceed with controls as below.
Pump absorption control
Pump absorption may vary depending on:
- feed tension
- running-in of the pump
- adjusting pressure
- cleanliness of the delivery filter
To carry out a control of the current absorbed, proceed
as follows:
- disconnect the pump command electromagnetic
switch connector
- with the ignition key set to "OFF", jump 30-87 to the
connector using the tester prods in amperometer
function (see figure).
- check the pump revolution and its absorption
Current absorbed = ~ 3.5 - 4.2 A
NOTE:
this absorption refers when:
-
feed tension = ~ 12 V
-
pump run-in
-
system pressure = 300 KPa (3 BAR)
-
clean fuel filter
A dirty filter causes absorption increase.
If the overpressure valve is opened the pump absorbs
~ 6-7 A
If excessive absorptions are revealed (> 5A) proceed
with replacement of the filter. See page 9-54 overhaul
of the support pump.
If the anomaly persists replace the pump.
Pump electrical controls
Содержание 500 cc
Страница 4: ...TABLE OF CONTENTS GENERAL INFORMATION AND MAINTENANCE 1...
Страница 12: ...TABLE OF CONTENTS SPECIFIC TOOLING 2...
Страница 15: ...TABLE OF CONTENTS AUTOMATIC TRANSMISSION 3...
Страница 32: ...TABLE OF CONTENTS FINAL REDUCTION 4...
Страница 34: ...TABLE OF CONTENTS FLYWHEEL COVER 5...
Страница 51: ...TABLE OF CONTENTS FLYWHEEL AND STARTING SYSTEM 6...
Страница 63: ...TABLE OF CONTENTS THERMAL UNIT AND TIMING SYSTEM 7...
Страница 94: ...TABLE OF CONTENTS CRANKCASE AND DRIVING SHAFT 8...
Страница 113: ...TABLE OF CONTENTS FUEL INJECTION 9...
Страница 220: ...TABLE OF CONTENTS LUBRICATION 10...
Страница 228: ...TABLE OF CONTENTS COOLING SYSTEM 11...
Страница 236: ...TABLE OF CONTENCTS STARTING 12...