APRILIA SHIVER 900 Service Station Manual page 146

Electrical system
•
Small difference detected between the estimated pressure and the measured pressure: the
measured pressure is below the estimated one (for example, smeared throttle body).
This error is indicated by flashing the general warning light and by lighting up in a fixed manner the MI
warning light.
Troubleshooting:
•
Check the pneumatic system between the pressure sensor and the socket to read pressure
on the throttle body; check that the intake manifold is in good conditions and the pressure
reading hole is clean.
Engine temperature sensor
Function
Serves the purpose of communicating the engine
temperature to the control unit in order to optimise
performance.
Operation / Operating principle
NTC type sensor (resistance sensor, inversely
variable with temperature).
Level in electrical circuit diagram:
Temperature sensors
Position:
•
On the vehicle: on the front cylinder on
the internal side facing the rear cylinder
•
Connector: on the sensor
Electrical specifications:
•
Resistance at 25°: 2.05 kOhm +/-
100%
•
Resistance at 60°: 575 Ohm +/- 15%
•
Resistance at 90°: 230 Ohm +/- 5%
Pin-out:
1. Brown yellow: 0-5 V signal
2. Black
3. Green/Pink: Ground
4. Black
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING, CAREFULLY READ THE GENERAL TROU-
BLESHOOTING CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGINNING OF THE CHECK
AND CONTROL SECTION IN THE ELECTRICAL SYSTEM CHAPTER.
DIAGNOSTIC TOOL: ELECTRICAL ERRORS
ELE SYS - 146
SHIVER 900