APRILIA DORSODURO 2007, Service Station Manual

Page: 109 / 302

Throttle body
THROTTLE BODY
Function
To inform the throttle control unit the position of the
two throttle valves and to drive them both.
Operation / Operating principle
All the unit internal components (potentiometer
and electric motor) are contactless; therefore, no
electrical diagnosis is possible for the throttle
body, only for the circuits connected to it.
Throttle body activation takes place every time the key is set to ON: correct activation is indi-
cated when the stop lights turn on.
If during activation, the engine is started, the activation is not completed and the stop lights do
not turn on.
Every 150 key-ONs, however, the throttle valves are forced to activation. If start-up is attempted
during this activation (which requires 3 seconds), the engine will not start.
Level in wiring diagram:
throttle control unit.
Location:
•
on the vehicle: inside the filter casing
•
connector: on the throttle body
Pin-out:
1. potentiometer signal: 1
2. supply v 5V
3. throttle valve control (+)
4. potentiometer signal: 2
5. throttle valve control (+)
6. ground connection
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING, CAREFULLY READ THE GENERAL CON-
CEPTS OF ELECTRICAL TROUBLESHOOTING FOUND AT THE BEGINNING OF THE CHECKS
AND CONTROLS SECTION IN THE ELECTRICAL SYSTEM CHAPTER.
AXONE: PARAMETERS
Front throttle Potentiometer 1 (voltage)
Example value: 800 mV
The value in the example refers to engine conditions with key set to ON.
Front throttle Potentiometer 2 (voltage)
Example value: 3878 mV
DORSODURO
Electrical system
ELE SYS - 109