APRILIA SHIVER 900, Service Station Manual

Page: 121 / 444

R
ESISTANCE MEASUREMENT
Winding stage Ambient temperature (ohm) Afterwards heat stabilisation (ohm)
Stage 1 0.15 - 0.20 0.18 - 0.23
Stage 2 0.15 - 0.20 0.18 - 0.23
Stage 3 0.15 - 0.20 0.18 - 0.23
Zero load voltage
•
Disconnect the three-way connector (1);
•
For a correct detection of the alternator voltage, a measurement must be carried out using
alternatively the 3 engine side connector pins: stage "1" (pin 1-2), stage "2" (pin 1-3), stage
"3" (pin 2-3)
•
Take the measurements;
•
If there is a significant difference between one stage and another (other than 15 V), this
means that the alternator is defective and must be replaced.
CAUTION
WITH THE ENGINE HOT THE VALUES RECORDED ARE ON AVERAGE 4-5 V LESS THAN THOSE
DETECTED WITH THE ENGINE COLD.
E
MPTY VOLTAGE
rpm 2000 6000 8000
Vm linked voltage Reference values (V rms) 20 - 30 75 - 85 95 - 105
Short-circuit current
•
For a correct detection of the short-cir-
cuit current, a connector must be pre-
pared that generates a downstream
short circuit between the three alterna-
tor cables;
•
Start the engine and with an ammeter
clamp measure each single cable.
•
If there is a significant difference be-
tween the measure of the single cables
(other than 10 A), this means that the
alternator is defective and must be re-
placed.
CAUTION
WITH THE ENGINE HOT THE VALUES RECORDED ARE
ON AVERAGE 2-3 A LESS THAN THOSE DETECTED WITH
THE ENGINE COLD.
WARNING
NEVER KEEP THE ENGINE RUNNING FOR MORE THAN
ONE MINUTE; FAILURE TO DO SO COULD CAUSE SERI-
OUS OVERHEATING DAMAGES TO THE MOTORCYCLE
CIRCUITS.
SHIVER 900
Electrical system
ELE SYS - 121