Diagnostics Guide - PIAGGIO 500 cc Service Manual

Lubrication
Lighting up of the minimum oil pressure indicator with a
Control the actual oil pressure.
- Remove the switch and install the special tool and
related gasket.
Specific tools:
Manometer
Manometer union
- Remove the dipstick with the oil loading plug and
insert a plug prepared with a temperature probe as
part of the specific tool.
Insert the probe until it comes into contact with the
bottom of the crankcase then pull it back a few
millimetres.
Specific tool:
Multimeter with temperature probe 020331Y
NOTE: The revolutions may be revealed by either the exhaust gas analyser or diagnosis
NO
Pressures of less than 4 bar
revealed.
10 - 4

DIAGNOSTICS GUIDE

warm engine.
Remove the electrical connector of the minimum pressure switch.
Check that the indicator lamp turns off.
YES
020193Y
020434Y
Measure the pressure with a cold idling engine.
Standard values: 20°C Temperature
Allow the engine to warm up and repeat the control with warm oil.
1400 rpm.
tester 020460Y.
Standard values: 80°C Temperature
YES
Replace the minimum
oil pressure switch.
NO
Check and reset the electrical
system.
⇒ ~ 4.5 bar
YES
⇒ ~ 1,5 bar
1400 rpm.
NO
Pressures of less than
1.3 - 1.5 bar revealed.