Ducati Diavel
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Ducati Diavel Service Manual: Air temperature sensor

Introduction

The engine control system on the diavel uses a sensor that measures air temperature. This sensor has a resistance of ntc type (negative temperature coefficient), that reduces its own value when the temperature increases. The air temperature sensor allows the engine control unit to modify the fuel-air mixture and ignition advance in relation to the atmospheric air temperature.

Components assembling position

Air temperature sensor


The air temperature sensor is mounted on the right hand air intake (the image also shows the location of the connection).

Wiring diagram

Air temperature sensor


Ccm engine control connection, s air temperature sensor. 1 Green/blue - g/b, 2 black/purple - bk/v.

In the event of fault

In the event of an air temperature sensor fault, the engine control unit implements a recovery value of 25C.

Fault codes generated and possible correlated faults

Fault codes generated by the engine control unit and displayed by the dds (intake air temperature sensor diagnosis):

Note

Check integrity of electric circuit - short-circuit to vdc = with dashboard on, using a voltmeter, a voltage is measured between the wire tested and ground.

Check integrity of electric circuit - short-circuit to ground = with the battery cables disconnected, using an ohmmeter, continuity is detected between the wire tested and ground.

Check integrity of electric circuit - open circuit = with the battery cables disconnected, using an ohmmeter, no continuity is detected between the two ends of the wire tested.

The dashboard service display shows the error "air temperature" and the eobd warning light activates.

Possible correlated faults: inadequate engine power, irregular idle speed (target idle speed is 1350 rpm with engine stabilised at operating temperature), the engine does not start easily. Check: -sensor resistance, which must be approximately 2 kohm at 25 C.

The air temperature value may be checked using the dds. Check that the value given is plausible.

If none of the aforementioned tests identify the problem and the air temperature sensor is in proper working order, replace the engine control unit.

Component replacement methods

No special measures are necessary in order to replace the air temperature sensor.

Component assembling position
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Other materials:

Check the idle and the co amount with warm engine
Start the engine; Switch on the dds and check that it does not signal any error (otherwise consult the relevant paragraph of this manual to reset the error and proceed with the idle check); Enter the "self diagnosis" menu by selecting the diavel model in the available vehicle version. ...

Injectors
Introduction The injectors used on the diavel are top feed units, meaning that fuel is fed into the top of the injector itself. The injectors contain a winding which raises a needle when electrically energised. This opens the atomiser nozzle, through which pressurised fuel is dispensed, gener ...

Tips for use on the road
Activate the dtc, select level 8 and ride the motorcycle in your usual style; if the level of dtc intervention seems excessive, try reducing the setting to levels 7, 6, etc., Until you find the level that suits you best. If changes in the grip conditions and/or circuit characteristics and/or ...

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