•
If short circuit to negative: disconnect the injector connector, set the key to ON and check if
there is a ground connection on the white/blue cable: if the connection is present, restore
the cable harness. If there is no connection, replace the injector
•
If open circuit: check the component correct electrical characteristic: if it is not the correct
one, replace the component; if it is correct, check the connector on the component and the
Marelli control unit connector: if not OK, restore. If OK, check cable continuity between the
ENGINE PIN 45 and component PIN - and restore the cable harness
Fuel pump
Function
Fuel pump: keeps pressure of the injectors supply
duct.
Low fuel: tells to the instrument panel about low
fuel
Operation / Operating principle
Low fuel: it is a resistance that if correctly supplied
varies its electrical resistance if it is damped or not
by petrol.
Level in electrical circuit diagram:
Injection load relay
Location:
•
on the vehicle: on the tank.
•
connector: on right rear frame (4-ways
black).
Electrical characteristics:
PIN 1-2: 0.5 - 1 ohm; PIN 3-4: you do not need to
measure the component electrical resistance
since it works correctly with suitable supply from
the instrument panel only. Check correct operation
as follows: connect in series a bulb of approxi-
mately 2 W: it should turn on if the tank is in
reserve, otherwise, it remains off.
Pin out:
1. + 12 V
2. ground connection
3. ground connection
4. + 12 V (signal)
Electrical system
Tuono V4 1100 Factory
ELE SYS - 206
Summary of Contents for 2Q000504
Page 1: ...SERVICE STATION MANUAL 2Q000504 Tuono V4 1100 Factory ...
Page 4: ......
Page 6: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Page 12: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 55: ...INDEX OF TOPICS SPECIAL TOOLS S TOOLS ...
Page 63: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 103: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 270: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 299: ...INDEX OF TOPICS ENGINE ENG ...
Page 415: ...INDEX OF TOPICS POWER SUPPLY P SUPP ...
Page 425: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 463: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 508: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 548: ...INDEX OF TOPICS COOLING SYSTEM COOL SYS ...
Page 561: ...INDEX OF TOPICS BODYWORK BODYW ...