PIAGGIO PORTER 1.3 16V 2008, Service Manual

Page: 506 / 892

Failure code Diagnostic failure code detection
Conditions
Affected area
P0500 The speed sensor does not transmit any signal
to the electronic control unit for a certain period
after the fuel supply is cut during the deceler-
ation phase.
(detection logic with 2 interventions)
- Instrument panel
- Interrupted and short-circuited wires in the
vehicle speed sensor circuit
- Vehicle speed sensor
- Vehicle electronic control unit
1. Speedometer operation check
•
Start the vehicle. If the speedometer does not indicate the correct vehicle speed, check the
speedometer circuit and the instrument panel (including the speedometer gear & meter ca-
ble). If the speedometer indication is normal, it means that the speedometer works regularly.
2. Check the input signal of the speed sensor to the electronic control unit
•
Set the special tool (sub-wiring harness).
•
Check that voltage between terminals 37 and 17 is within the specified limits when the ve-
hicle is moving with the ignition switch set to ON.
Characteristic
specified value:
4.5 a 5.5 V per pulse signal.
If it does not match the specified value, check or
replace the engine electronic control unit.
3. Check the speed sensor (reed switch)
•
Set the ignition switch to OFF.
•
Remove the instrument panel
•
Check that there is continuity for four
times on terminals B10 and B11 of the
instrument panel, while the speedom-
eter transmission completes one revo-
lution. Check continuity two times for
each speedometer transmission revo-
Iniection System
PORTER 1.3 16V
IS - 506