Throttle Body - APRILIA SL 750 SHIVER Service Station Manual

Electrical system

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 voltage + 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
ELE SYS - 56
SL 750 SHIVER