PIAGGIO PORTER 1.3 16V 2008 User Manual

IAT SENSOR CIRCUIT DESCRIPTION
The intake air temperature sensor IAT sensor,
measures the air temperature in the intake pipe
between the air filter and the throttle body. The
thermistor inside the sensor changes the resist-
ance value according to the intake air temperature.
The lower the temperature value is, the higher the
thermistor resistance value is and, the higher the
intake air temperature is, the lower the thermistor
resistance value is.
When the IAT sensor resistance value varies ac-
cording to temperature variations, also the THA
terminal potential changes. According to this sig-
nal, the engine electronic control unit (ECU) in-
creases the fuel volume injected improving riding
conditions while operating with the engine cold.
For the Model EURO 4, the circuits in question
comprise the cable harnesses downstream and
upstream the DRACO control unit and on the DRA-
CO itself.
Failure code Diagnostic failure code detection
Conditions
Affected area
P0110 Short circuit or open circuit in the IAT sensor
circuit.
- interrupted or short-circuited cable in the IAT
sensor cable harness
- IAT sensor, intake air temperature
- ECU
Once the diagnostic failure code P0110 is confirmed, use the diagnostic tester to measure the intake
air temperature by:"CURRENT DATA".
Temperature displayed Malfunction
-30° Open circuit
about 130° Short circuit
Checking procedure
•
If the diagnostic failure codes P0110 (IAT - Intake air temperature sensor circuit), P0115
(ECT - Engine coolant temperature sensor circuit), and P0120 (TPS - Throttle position sen-
sor) are generated at the same time, the Sensor ground E2 could be open.
•
Read the frozen image data using the diagnostic tester. As frozen image data record the
engine conditions at the moment the defect is detected, these data are useful to determine
PORTER 1.3 16V Iniection System
IS - 445

PIAGGIO PORTER 1.3 16V 2008 Specifications

General

Brand	PIAGGIO
Model	PORTER 1.3 16V 2008
Category	Automobile
Language	English