APRILIA SHIVER 900 Service Station Manual page 115

SHIVER 900
of circuit tested. Continuity may also be tested by setting the tester selector to the "Ohm" symbol and
checking that the resistance in the circuit is zero or of a few tenths of an Ohm.
IMPORTANT: THE CIRCUIT MUST BE UNPOWERED DURING THIS TEST. IF THE CIRCUIT IS
POWERED, THE RESULTS OF THIS TEST ARE MEANINGLESS.
Checking GROUND CONNECTION
Purpose of check: the purpose of this check is to verify that a cable or circuit is correctly connected
to the ground (-) of the vehicle.
Tester: set the tester selector to the "continuity" symbol and place one of the tester probes on the vehicle
ground point (or on the battery negative pole) and the other probe on the cable under inspection. Nor-
mally, the tester will sound an audible signal to confirm continuity in the section of circuit tested.
Continuity may also be tested by setting the tester selector to the "Ohm" symbol and checking that the
resistance in the circuit is zero or of a few tenths of an Ohm.
IMPORTANT: WHERE GROUND IS PROVIDED BY THE ECU, CHECK THAT THE ECU IS EFFEC-
TIVELY PROVIDING THE GROUND CONNECTION FOR THE CIRCUIT DURING THE TEST.
Checking VOLTAGE
Purpose of check: the purpose of this check is to determine if a cable is carrying voltage, in other
terms, to verify whether it powered by the battery or ECU.
Tester: set the tester selector to the "DC voltage" symbol and place the red tester probe on the cable
under inspection and the black tester probe on the vehicle ground point (or on the battery negative
pole).
CAUTION
IN THE CASE OF SPORADIC FAULTS, MOVE OR WIGGLE THE RELATIVE WIRING HARNESS
SLIGHTLY WHILE PERFORMING EACH OF THE CHECKS INDICATED FOR TROUBLESHOOT-
ING.
Immobiliser
System components
Function
detects the transponder code in the key and sends
it to the instrument panel
Level in electrical circuit diagram:
Immobilizer
Position:
•
on the vehicle: in the ignition switch as-
sembly
•
connector: two way, grey colour, be-
hind the instrument panel
Electrical system
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