Gilera Runner Purejet 2007, Workshop Manual, Page: 115 / 257

8. Do not invert the polarity when fitting the battery.
9. To prevent damage, disconnect and reconnect the ECU system connectors only if required. Before
reconnecting, check that the connectors are dry.
10. During electrical checks, do not force the tester tips into the connectors. Do not perform tests not
specifically required by the manual. Perform electrical checks using the interface wiring specific tool.
11. At the end of every check performed with the diagnostic tester, protect the system connector with
the cap. Failure to comply with this rule may damage the ECU.
12. Before reconnecting the quick couplings of the power supply system, check that the terminals are
perfectly clean.
13. During repairs, do not remove the compressed air line clamps. If required, replace the rubber hose.
14. If you have to remove the air injector, replace the carbon dam sealing ring.
15. Do not perform voltage checks on the spark plug when it is not fitted on the head. Power supply
voltages are very high. Hazard of dangerous electric shock. In addition, the air - fuel mixture leaking
from the spark plug may cause fire.
16. Do not switch to «ON» during repair procedures when the tank is empty. While on the road, do not
use the reserve if it could deplete the fuel.
17. Do not disconnect the battery leads when the engine is running.
18. If the fuel is completely depleted, refuel with at least 4 litres. This will enable safe triggering of the
fuel pump
Specific tooling
020481Y Control unit interface wiring
troubleshooting
suggestions for diagnosis
1 A failure of the injection system may most probably depend on the connections rather than the com-
ponents.
Before troubleshooting the injection system, perform the following checks:
1. Power supply
Battery voltage
Burnt fuse
Connectors
2. Ground to frame
3. Air supply
Volumetric compressor
Supply line
4. Fuel supply
Faulty fuel pump
Runner Purejet
pure jet injection
INJ PJ - 115