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DOES THE VALUE MEASURED MATCH THAT

ONE SPECIFIED?

If SO (EURO3): Check the malfunction that is de-

tected intermittently or inefficient contacts

If SO (EURO4): Check the signal entering the

DRACO 1. connect the interface wiring between

the DRACO and the vehicle cable harness and re-

store the original connection between the DRACO

and the ECU. 2. Repeat voltage checks as in Step

IS THE VOLTAGE MEASURED 5.0 V ?

There is an interruption in the DRACO or in the

connection cable harness to the ECU. check con-

tinuity between: 11/22 76R< 1 Ohm = no failure

detected 21/22 17R< 1 Ohm = replace DRACO or

cable harness.

DOES THE VALUE MEASURED MATCH THE

ONE SPECIFIED? If SO (EURO4): Check the

malfunction that is detected intermittently or insuf-

ficient contacts

If NOT (EURO4): 1. Connect the interface wiring

020463Y between the ECU and the DRACO and

restore connections between the DRACO and the

vehicle cable harness. 2. Repeat voltage checks

as in Step 1.

If NOT : proceed with Step 2.

Step 2

Checking the cable harness between the IAT sen-

sor and the ECU electronic control unit.

1. Set the ignition switch to OFF.

2. Disconnect the cable harness from the IAT sen-

sor.

3. Disconnect the special tool connectors (inter-

face wiring), ECU side, electronic control unit.

4. Referring to the section "Checking cables and

connectors" and to the "IAT sensor circuit dia-

gram" at the beginning of the chapter, check there

are no interrupted or short-circuited cables in the

Iniection System PORTER 1.3 16V

IS - 450

PIAGGIO PORTER 1.3 16V 2008 User Manual

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