PIAGGIO 500 cc Service Manual page 189

YES
Check that the sensor circuit is isolated
from the earth.
4-23 = Ω infinity (>1MΩ)
22-23 = Ω infinity (>1MΩ)
YES
Connect the special tool 020481Y to the
control unit.
Set ignition to "ON" with switch on "RUN" and side
stand raised.
Measure the tension at terminals 4 and 22;
4-22 = V (as per table)
TENSION
X V
X V
X V
X V
X V
X V
YES
TEMPERATURE
-10° C
0
+10° C
+20° C
+30° C
+80° C
NO
Measured value = 5±0,2 V
Repeat continuity
controls of the harness
and sensor.
NO
Reset or replace the harness
Check the air temperature lines and
throttle valve position.
Measured value = 0 V
Repeat controls of earthing
isolation of the circuit and
the sensor.
YES
Fuel injection
NO
NO
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