Gilera 633499 Workshop Manual page 125

Runner Purejet
• Fuel consumption reduction
• Lubricant consumption reduction
• Discharge emission reduction. Emissions are further limited by the catalyser.
The injection system achieves these results by:
• Air washing of the 2T cycle
• Stratified load
• Fine spray of the load through pneumatic injection
These results are obtained without impairing the delivery features of torque and power
If any input signals are missing, acceptable engine performance is ensured to allow the user to reach
the garage.
Of course this cannot happen when the phase rpm signal is missing, or when the fault concerns control
circuits:
- Fuel pump
- H.V. coil
• Injectors
• TPS ( Throttle Position Sensor )
The ECU is supplied with a auto-diagnostic system and informs the user by the light on the instrument
panel. The signals are given in two ways:
• Flashing light
• Steady light
The flashing light denotes a medium fault that requires a check at the workshop. The engine may work
normally or in limited conditions.
A steady light indicates the presence of a fault that usually requires the engine be stopped. If the engine
is functional, slow down and proceed as quickly as possible with the necessary checks.
precautionary measures
1.Before fixing any part of the injection system, check any registered faults. Never disconnect the battery
before checking for faults.
2. The power supply system is pressurised at 250 ÷ 800 KPa (2.5 ÷ 8 BAR). Before disconnecting the
snap on attachment of a fuel line, check that there are no free flames and do not smoke. Act with caution
to prevent spraying in the eyes.
3. When fixing electric components, operate with battery connected only when actually required.
4. When functional checks are performed, check that the battery voltage is more than 12V.
5. When washing the vehicle, be careful of the electric components and wiring.
6. When an ignition fault is detected, start the checks from the battery and the injection system con-
nections.
7. Before disconnecting the ECU connector, perform the following steps in the order shown: Set the
switch to "OFF" then disconnect the battery. Failure to comply with this rule may damage the ECU.
pure jet injection
INJ PJ - 3