PIAGGIO PORTER 1.3 16V 2008, Service Manual

Page: 473 / 892

75 of the special tool. Repair and replace the cable
harness or the connector, if necessary.
3. Checking the oxygen sensor output voltage while running at idle.
•
Connect the oxygen sensor and connectors of the special tool, respectively.
•
Connect the diagnostic tester DS-21 to the Data Link Connector by means of the special
tool.
Specific tooling
020618Y Cable harness for connecting the OBD Connector and the Diagnostic Tester
•
Set all the accessory switches to OFF.
Warm up the engine at 2500 rpm, until
the radiator fan completes one turn.
•
Set the tester main switch to ON.
Read the oxygen sensor output voltage with the
engine running at idle and the radiator fan stop-
ped.
If voltage varies repeatedly between a voltage be-
low 0.32V and above 0.58V, jump to step 8 .
4. Air intake system check
Check the following options:
- Checking the engine oil level indicator, oil cap
and PVC pipe, also inspecting that the latter is not
disconnected.
- Checking there is no disconnection, loosening or
cracking in the air intake system parts between the
cylinder head and the throttle body. Repair or re-
place the intake system, if necessary.
5.
Checking the fuel pressure and repair the fuel
pump, fuel pressure regulator, fuel pipe and filter,
if necessary.
6.
Checking the injector injection. Check for proper
operation and replace the injector, if necessary.
7. Checking the oxygen sensor unit output
voltage
•
Warm up the engine completely.
PORTER 1.3 16V
Iniection System
IS - 473