APRILIA Tuono V4 1100 Factory Service Station Manual page 226

Electrical system
•
Yes/No
gear engaged: 0 - 1 - 2- 3 - 4 - 5 - 6
DIAGNOSTIC TOOL: ELECTRICAL ERRORS
P0914 Gear sensor
Electrical diagnosis:
•
short circuit to positive or open circuit / short circuit to negative / signal not plausible.
Error cause
•
If open circuit, short circuit to positive: excessive voltage has been detected on PIN 72.
•
If short circuit to negative: voltage equal to zero detected at PIN 72.
Troubleshooting
•
If open circuit, short circuit to positive: the error is detected only when the engine is on and
the vehicle is moving (gear engaged). check the sensor connector and the VEHICLE con-
nector of the control unit: if not ok, restore; if ok, check the continuity of the Grey/Black cable
between the two connectors: if not ok restore, if ok, with key ON (with the control unit con-
nector disconnected), check from the control unit connector side if the cable is energised: if
energised, disconnect the sensor connector and check if the cable is energised: if energised,
restore the wiring harness; if not energised, replace the sensor (there is an interruption or a
short circuit to positive of the Pink cable on the segment that goes from the sensor connector
to the sensor or inside the sensor).
•
If short circuit to negative: disconnect the sensor connector and, with key ON, check the
voltage of the Grey/Black cable: if it is zero, restore the wiring harness; if it approximately 5
V, replace the sensor (there is short circuit to ground of the Pink cable on the segment that
goes from the sensor connector to the sensor or inside the sensor).
CAUTION
IF THE ERROR IS SHOWN, IT MAY BE A FALSE CONTACT, SINCE IF THE PROBLEM PERSISTS,
IT SHOULDN'T BE POSSIBLE TO START TH VEHICLE.
Clutch lever sensor
Function
Indicates the clutch lever position to the control
unit.
Operation / Operating principle
If a gear is engaged but the clutch is engaged, that
is circuit closed to ground, there is consent to start
the vehicle.
Level in electrical circuit diagram:
Start enable switches
ELE SYS - 226
Tuono V4 1100 Factory