APRILIA TUONO V4 R 2010 Service Station Manual page 195

TUONO V4 R
Fall sensor: Normal / Tip over
•
Indication on Navigator always Normal, even when the sensor is inverted: disconnect the
connector and, with sensor inverted, check if there is continuity between the two PINS of
the sensor: If there is not continuity, replace the sensor; if there is continuity, check the
connector: if not OK, restore cable harness; if OK, check the ground continuity of PIN 1: if
there is not continuity, restore cable harness; if there is continuity, check, with key ON, if
there is voltage of 5 V at PIN 2; if there is not voltage, check Marelli control unit connector
(with special attention to PIN 65) and check the vehicle-engine cable harness connector
(with special attention to PIN B6).
•
Indication on Navigator always Tip over: disconnect the connector and check if there is
continuity between the two PINS when the sensor is in vertical position: if there is continuity,
replace the sensor; if there is not, it means that, with key set to ON, there is no 5V voltage
at PIN 2: restore the cable harness whose pink/white cable will be shorted to ground
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.
Electric fan circuit
Function
Radiator fan and coolant - Operation
Operation / Operating principle
When the control unit detects a temperature of ap-
prox. 101 °C, it closes the fan control relay pickup
circuit to ground
Level in electrical circuit diagram:
electric fan
Location:
•
sensor: relay placed in the frame front
niche, on the left
•
connector: on the relay
Electrical characteristics:
•
relay normally open;
•
drive coil resistance 110 Ohm (+/- 10
%)
DIAGNOSIS INSTRUMENT: STATUSES
Fan relay
Electrical system
ELE SYS - 195