Checking The Coolant Thermistor Operation - APRILIA RSV mille Workshop Manual

ELECTRIC SYSTEM
6.4.8 CHECKING THE COOLANT THERMISTOR
OPERATION
NOTE
The value of the temperature measured by the
front cylinder thermistor (right-hand side) is sent up on the
right-hand display; that measured by the rear cylinder
thermistor (left-hand side) is sent to the electronic unit.
N
Remove the thermistor (1), see 5.5 (REMOVING THE
COOLANT THERMISTORS).
N
Connect a tester (2) (set as an ohmmeter) to the ther-
mistor (1), as illustrated in the figure.
N
Immerse the thermistor (1) in a container (3) holding
coolant.
N
Immerse a thermometer (4) with a 0 – 150 °C (32 – 302
°F) range in the same container).
N
Place the container on a burner (5) and slowly warm up
the liquid.
N
Check the temperature indicated on the thermometer
(4) and the thermistor (1) value indicated by the tester.
Make sure that the value varies according to the temper-
ature, as indicated.
Coolant temperature
(°C) (°F)
20 68
40 104
60 140
80 176
100 212
If values do not vary, or if they depart excessively
from those indicated in the table, change the thermis-
tor (1).
N
Repeat the procedure for the other thermistor.
6 - 14
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Standard values
(Ω) (± 10%)
1960 – 2940
800 – 1200
400 – 700
200 – 400
120 – 250
RSV mille
Release 00/2002-10