APRILIA Atlantic 300 Service Station Manual page 157

ATLANTIC 300 i.e.
Injection
6. If the vehicle is not going to be used for a long time, refill the tank up to a little over half its capacity.
This ensures that the pump will be covered by fuel.
7. When washing the vehicle, do not press the electric components and wirings.
8. When an ignition fault is detected, proceed to check the battery and the injection system connections
first.
9. Before disconnecting the MIU control unit connector, follow these steps respecting the order shown:
- Set the switch to «OFF»
- Disconnect the battery
Failure to observe this rule can damage the electronic control unit.
10. Do not invert the poles when fitting the battery.
11. In order to prevent damages, disconnect and reconnect the MIU system connectors only if actually
required. Before restoring the connections, check that they are perfectly dry.
12. When carrying out electric inspections, do not force the tester probes into the connectors. Do not
take measurements not specifically required by the manual.
13. At the end of every check carried out with the diagnostic tester, protect the system connector with
the specific cap. Failure to observe this rule can damage the MIU electronic control unit.
14. Before reconnecting the fast-release fittings of the power supply system, check that the terminals
are perfectly clean.
Troubleshooting tips
1 A failure of the MIU system is more likely to be due to the connections rather than the components.
Before searching the MIU system for failures, check:
A: Power supply
a. Battery voltage
b. Blown fuse
c. Solenoids
d. Connectors
B: Chassis ground connection
C: Fuel system
a. Broken fuel pump
b. Dirty fuel filter
D: Ignition system
a. Faulty spark plug
b. Broken coil
c. Broken shielded cap
E: Intake circuit
a. Dirty air filter
b. Clogged by-pass circuit
INJEC - 157