Check whether there are any indications regarding
the sucked air temperature sensor.
YES go to 3 NO go to 2
Specific tooling
020680Y Diagnosis Tool
2 - The EMS system has received no indications of temperatures out of the range of possible values.
If you suspect a wrong temperature indication, proceed to perform the following check.
3 - Before checking the sensor and the relevant circuit, wait until the engine has cooled down and the
scooter has set to the working area temperature.
YES go to 4
4 - Set the switch to "ON" with switch to "RUN" and side stand raised. On the diagnostic tester, select
the «PARAMETERS» menu.
YES go to 5
5 - Check the following values:
coolant temperature
intake air temperature
ambient temperature indicated by the digital instrument.
The three indications are equal or they are slightly different (e.g. 1° C).
YES go to 6 NO go to 7
6 - The intake air temperature sensor is providing an incorrect information.
7 - Install the special tool. Do not connect the control unit connector.
YES go to 8
Specific tooling
020481Y Control unit interface wiring
8 - Disconnect the intake air temperature sensor connector.
Measure the resistance between the sensor terminals. Check that the resistance matches the values
declared according to the temperature.
TEMPERATURE RESISTANCE
Specification
Desc./Quantity
1 9,6 KΩ -10° C
2 5,975 KΩ 0
3 3,81 KΩ +10° C
4 2,5 KΩ +20° C
5 1,68 KΩ +30° C
Beverly 500 i.e. Injection
INJEC - 243
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