MOTO GUZZI 2Q000297 Service Station Manual page 108

Electrical system
•
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.
Giri / min
Vm tensione concatenata Valori di riferimento ( V
rms )
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.
RPM
RMS DC current (Arms) (average of the 3 stage
currents)
Voltage on battery poles with engine speed always between 3000 - 5000 RPM
ELE SYS - 108
T
ENSIONE A VUOTO
2000
40 - 45
C
OLD SHORT CIRCUIT CURRENT
2000
26 - 30
4000
82 - 87
4000 6000
20 - 25 30 - 35
V7 III ABS
6000
132 - 138
8000
30 - 35