PIAGGIO 500 cc Service Manual page 193

YES
Check that the sensor circuit is isolated from
the earth.
18-23 = Ω infinity (>1MΩ)
22-23 = Ω infinity (>1MΩ)
YES
Set ignition to "ON" with switch on "RUN" and side stand raised.
Measure the tension at terminals 18 and 22.
18-22 = V as per table.
TENSION
XXX V
XXX V
XXX V
XXX V
XXX V
YES
Start the engine and check that the tension reduces progressively according to temperature
In a temperate climate it is quite easy to reach 30°C after a few minutes of parking with the engine idling.
Check the coolant temp. lines and throttle position.
Connect the special tool 020481Y to the control unit.
TEMPERATURE
-10° C
0
+10° C
+20° C
+30° C
NO
Measured value = 5±0.2V
Repeat continuity
controls of the sensor and
harness.
Check the connection to
the control unit.
Check the control unit feeds If
necessary replace the control unit.
increase in the air filter box.
NOTE
Reset or replace the harness.
NO
Measured value = 0 V
Repeat control of
earthing isolation of the
sensor circuit.
YES
Reset or replace the
Fuel injection
NO
NO
harness.
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