5. Before any attempt to start the vehicle, check to make sure there is at least two litres of fuel in the
tank. Failure to respect this norm will damage the fuel pump.
6. If the vehicle is expected to remain unused for a long time, refill the tank up to a little over half the
level. This will ensure the pump will be covered by fuel.
7. When washing the vehicle, be careful with the electric components and cable harnesses.
8. When an ignition problem is detected, start the checks from the battery and the injection system
connections.
9. Before disconnecting the MIU ECU connector, perform the following steps in the order shown:
- Set the switch to «OFF»
- Disconnect the battery
Failure to respect this norm may damage the control unit.
10. Do not invert the poles when fitting the battery.
11. To avoid causing any damage, disconnect and reconnect the MIU system connectors only if re-
quired. Before reconnecting, check that the connectors are dry.
12. When carrying out electric inspections, do not force the tester probes into the connectors. Do not
take measurements not specifically foreseen by the manual.
13. At the end of every check performed with the diagnostic tester, remember to protect the system
connector with its cap. Failure to observe this precaution may damage the MIU control unit.
14. Before reconnecting the quick couplers of the power supply system, check that the terminals are
perfectly clean.
Terminals setup
ELECTRONIC CONTROL UNIT CONNECTOR
1. H.V. COIL (Pink-Black)
2. Not connected
3. Not connected
4. Ground (Orange)
5. Starter button (Purple)
6. Ignition switched live (Orange-Blue)
7. Ground No. 1 (Black)
Vespa LX - S 125 3V ie 150 3V ie (2012) Injection
INJEC - 179
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