APRILIA SHIVER 900 Service Station Manual page 176

Electrical system
DIAGNOSTIC TOOL: STATUSES
Gearbox in neutral
•
Yes/No
gear engaged: 0 - 1 - 2- 3 - 4 - 5 - 6
DIAGNOSTIC TOOL: ELECTRICAL ERRORS
P0914 Gear sensor
•
short circuit to positive or open circuit/ short circuit to negative.
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 with a gear engaged. check
the sensor connector and the VEHICLE connector 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 and with the control unit connector 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: in this case, restore the wiring harness; if not
energised, replace the sensor (there is an interruption or a short circuit to positive of the
White/Black 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).
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
Position:
ELE SYS - 176
SHIVER 900