PGO BR-500 - Sucked Air Temperature Sensor

Circuitlayout
The sucked air temperature sensor is installedin the bottom side of the throttle body on the filter box side.
The sensor is an NTC and has the same functionallayout as the cooling fluid temperature sensor.
This signal is used to optimise the engine performance.Anyway, this data is less important than the cooling fluid
temperature signal.
A failure of this circuit causes the controllerto turn on the injection indicator starts the safety control, thereby
ensuringthe engine operation.
To check the sensor and the relevant circuit,proceed as follows:
TERMINALS CONDITIONS STANDARD
18 - 22
sucked air temperature 20degree With connected sensor
3750 +-200
Ω
1
CONTROLLER
3
A
IR TEMPERATURE SENSOR
2
VALVE POSIT. SENSOR
4
FLUID TEMPERATURE SENSOR
1
- Connect the diagnostic
tester dwg. 020460Y
Select the menu on the
"ERRORS" function.
Check whether there are any
indications regarding the
sucked air temperature sensor.
YESgo to 3 NOgo to 2
2
-The EMS system has received no indications of temperatures out of the range of possible
values. If you suspect a wrong temperature indication,
check as follows.
3
-Before checking the sensor and the relevant circuit, wait until the engine has cooled down
and the vehicle has set to the working area temperature.
YESgo to 4
4
- Set the switch to "ON" with switch to "RUN" and side stand raised.
On the diagnostic tester, select the "parameters" menu.
YESgo to 5
5
-Check the following values:
cooling fluid temperature
sucked air temperature
ambient temperature indicated by the digital instrument.
The three indications are equal or they are slightly different (e.g. 1degreee C).
YESgo to 6 NOgo to 7
6
-The sucked air temperature sensor is providing an incorrect information.
7
-Install the specific tool dwg. 020481Y. Do not connect the controller connector.
YESgo to 8
8
-Disconnect the sucked air
temperature sensor connector.
Measure the resistance
between the sensor terminals.
Check that the resistance
matches the values declared
according to the temperature.
TEMPERATURE
PGO BR-500 ENGINE
P.9-75
Sucked air temperature sensor