APRILIA TUONO V4 R 2010 Service Station Manual page 182

Electrical system
(from throttle sensor connector or control unit connector). If it is ground insulated, check that
there is power (+5 V) at the throttle body connector PIN 2, and that PIN 6 is connected to
ground. If both are correct, replace the throttle body
potentiometer 1 sensor, front throttle position P0125
•
short circuit to positive / open circuit, short circuit to negative
Error cause
•
If shorted to positive: excessive voltage has been detected at PIN 36. If the circuit is open,
shorted to negative: voltage equal to zero has been detected at PIN 36
Troubleshooting
•
If shorted to positive: check the value shown by the parameter of the Rear throttle Potenti-
ometer 1 (voltage): disconnect the left connector and see the value displayed by Navigator:
if the voltage does not vary, there is a short circuit in the cable wiring; replace the throttle
body if the voltage drops to zero.
•
If the circuit is open, shorted to negative: check the throttle body connector and the control
unit connector. If not OK, restore; if everything is OK, check circuit continuity between the
two terminals. If not OK, restore the cable harness; if OK, check the circuit ground insulation
(from throttle sensor connector or control unit connector). If it is ground insulated, check that
there is power (+5 V) at the throttle body connector PIN 2, and that PIN 6 is connected to
ground. If both are correct, replace the throttle body
potentiometer 2 sensor, front throttle position P0127
•
short circuit to positive / open circuit, short circuit to negative
Error cause
•
If shorted to positive: excessive voltage has been detected at PIN 21. If the circuit is open,
shorted to negative: voltage equal to zero has been detected at PIN 21.
Troubleshooting
•
If shorted to positive: check the value shown by the parameter of the rear Throttle Potenti-
ometer 2 (voltage): disconnect the left connector and see the value displayed by Navigator:
if the voltage does not vary, there is a short circuit in the cable wiring; replace the throttle
body if the voltage drops to zero.
•
If the circuit is open, shorted to negative: check the throttle body connector and the control
unit connector. If not OK, restore; if everything is OK, check circuit continuity between the
two terminals. If not OK, restore the cable harness; if OK, check the circuit ground insulation
(from throttle sensor connector or control unit connector). If it is ground insulated, check that
there is power (+5 V) at the throttle body connector PIN 2, and that PIN 6 is connected to
ground. If both are correct, replace the throttle body
Rear throttle control circuit P0166
ELE SYS - 182
TUONO V4 R