PIAGGIO PORTER 1.3 16V 2008, Service Manual

Page: 452 / 892

If the value measured matches the actual water
temperature, check the malfunction that is detec-
ted intermittently or inefficient contacts (see the
relevant section); otherwise, if it is -40°C, proceed
with step 2; if it is 140°C or higher, proceed with
step 4.
2) Checking interrupted cables in the cable
harness or inside the engine electronic control
unit ECU
1 . Set the tester main switch and then the ignition
switch to OFF.
2 . Disconnect the engine coolant temperature sen-
sor connector (ECT).
3 . Connect a linking wire between terminals (X30)
and (X31) of the ECT sensor.
Specific tooling
Integrated in the 020618Y Lift for diagnosis
4 . Set the ignition switch and then the tester main switch to ON. Read the engine coolant temperature
value on the diagnostic tester DS-21 or on the OBD II general scanning device. If the value measured
is equal to 140°C or higher, check the connector connection or the ECT sensor terminal. If it is satis-
factory, replace the ECT sensor, otherwise proceed with step 3.
3)
Checking interrupted cables in the cable harness or inside the engine electronic control unit (2)
1 . Set the tester main switch and then the ignition switch to OFF.
2 . Set the special tool (sub-wiring harness).
Specific tooling
020463Y ECU-EFI interface cable harness to check the injection system electrical values.
3 . Disconnect the linking wire from the ECT sensor
connector.
4 . Afterwards, connect the linking wire between
terminals (46) and (7) of the special tool connector.
Iniection System
PORTER 1.3 16V
IS - 452