APRILIA RSV4 RR Service Station Manual page 218

Electrical system
Fall sensor: Normal / Tip over
•
Indication on diagnostics instrument always Normal, even when the sensor is inverted: dis-
connect 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 the diagnostics instrument 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
Activates coolant radiator fan
Operation / Operating principle
When the ECU detects a temperature of approxi-
mately 101°C, it closes the connection between
the fan control relay excitation circuit and ground
Level in electrical circuit diagram:
electric fan
Position:
•
sensor: relay installed in front frame re-
cess on left hand side
•
connector: on relay
Electrical specifications:
•
relay normally open;
•
drive coil resistance 110 Ohm (+/- 10
%)
DIAGNOSTIC TOOL:STATUSES
Fan relay
ELE SYS - 218
RSV4 RR/RF