Gilera Runner RST Purejet, Service Manual, Page: 136 / 235

11. Carefully check the ECU power supply. Re-
place the ECU if required.
GO TO point 10
12. Connect the TPS sensor connector and meas-
ure the voltage.
16(-) - 18 (+) = 5 V
YES point 14 NO point 13
13. Voltage measured: 0 V or much lower than 5V.
Check the connector and replace the throttle body,
if required.
Replacement
Resetting
GO TO point 12
14. Measure the voltage of the TPS1 and TPS2
16 - 7 = V TPS1 (increasing with the opening from
0.5 to 4.5V)
16 - 10 = V TPS1 (decreasing with the opening
from 4.5 to 0.5V)
Voltage variations must be progressive with gas
opening, without stall or direction reversal. The
sum of voltages TPS1 and TPS2 must be constant
and with values slightly lower than the TPS sensor
power supply voltage.
YES point 16 NO point 15
15. Check the TPS and ECU connectors and replace the throttle body, if required.
Replacement
Resetting
GO TO point 14
16. Check that the voltage values of signals TPS1 and TPS2 measured match those shown by the
diagnostic tester in the «parameters» function.
YES point 18 NO point 17
Specific tooling
020481Y Control unit interface wiring
020460Y Scooter diagnosis and tester
17. When slightly different voltage values are found, check the ECU connector more thoroughly and
replace the ECU if required.
18. TPS sensor and circuit meet specs.
pure jet injection
Runner RST Purejet
INJ PJ - 24