PIAGGIO 500 cc - Fuel Injection - Coolant Temperature Sensor Overview

Fuel injection
9 - 74
- Reassemble the flywheel side inspection plug.
- Connect the diagnosis tester 020460Y. See page 9-
17.
- Start the engine.
- Select the function from the menu "parameters".
- Select the stroboscopic lamp command in the tradi-
tional 4-stroke engine position (1 spark 2 revolutions).
- Check correspondence between the revolutions
values and actual spark advance and those stated by
the diagnosis tester.
- If the values do not correspond check:
- valve gear timing
- phase-revolutions sensor
- fuel injection control unit
COOLANT TEMPERATURE SENSOR
Terminals Conditions Standard
4-22 coolant temperature With sensor connected:
20° = 2500 ± 100 Ω
80° = 308 ± 6 Ω
CIRCUIT DIAGRAM
3
2
A1
A2
B1
B2
22
4
18
11
1
4
1
CONTROL UNIT
THROTTLE POSITION SENSOR
AIR TEMPERATURE SENSOR
COOLANT TEMPERATURE SENSOR
3
4
1
2
TO TEMPERATURE
INDICATOR