Bold reference numbers in this section identify parts not shown in the figures alongside the text, but which can be found in the exploded view diagram.

The “DDS” diagnostic system lets you diagnose any faults in the injection-ignition system via a serial port. The system is also equipped with functions to test various devices on the motorcycle. The DDS diagnosis instrument can be used to measure cur­rent and voltage on any electrical device, to perform tests on individual components and to measure pressure and temperature values.

The DDS diagnosis instrument (1) is comprised of a Palmtop display unit (A), a BBAD self-diagnosis module (B) and a display memory card (C).

The self-diagnosis module (B) enables communication between the DDS diagnosis instrument (1) and the motorcycle’s on-board electronic control unit (ECU).

The top connection panel has 6 connection sockets with the following functions:

The bottom connection panel has 3 connection sockets with the following functions:

You can connect a printer to the DDS diagnosis instrument (1) to print test reports: connect the printer to the serial port (COM1) (G) located on the top connection panel of the tester (1).

The tester requires a power supply voltage within 9 and 16 Volts D.C.

Make sure voltage never drops below this limit during operation: this situation could occur during engine starting and idling on motorcycles in which the battery is not in perfect working order. If the tester detects a power supply voltage lower than 9 Volts, the current procedures will be reset; when the voltage returns to the acceptable tolerance limits the procedure must start again from the beginning.

For connection of the various devices required for self-diagnostic procedures, consult the instruction handbook supplied with the tester.

This operation, which is performed using the DDS diagnosis instrument, has the advantage that it can be carried out on both timing belts with the engine still installed on the frame. An optical reader is connected to the DDS diagnosis instrument. The optical reader has a green LED that serves to determine that the reader is correctly positioned in front of the belt to be tested. It is also equipped with an infrared transmitter (A) and receiver (B) designed to detect oscillations of the belt when caused to vibrate with the flick of a finger.

This is achieved by aligning the timing mark (C) of the timing driveshaft pulley (28) with the reference notch (D) on the clutch cover (T).

Measure the horizontal timing belt on the section (23) as described in paragraph “Measuring timing belt tension”.

Turn the crankshaft through 270° in the direction of rotation of the engine (so that the piston of the vertical cylinder is at TDC of the power stroke) and repeat the procedure used for the horizontal cylinder, measuring the tension on section (22) of the vertical cylinder timing belt.

Turn on the DDS diagnosis instrument (1) referring to the paragraph “Tester power supply”.

Connect the power and diagnostics cable (Measurement Module) (3) to the measurement module connector (F) on the DDS di­agnosis instrument (1).

Direct the central green LED of the sensor (15) at the midpoint of the belt section, placing the sensor (15) parallel to the belt and at a distance of about 1÷1.5 cm from it.

On the DDS diagnosis instrument (1), select the “Measurement module” function by pressing the corresponding icon; then press the “Belt Tension” icon followed by the “Start” icon to access the “Mechanical belt tension” screen.

The socket to which the cable (Measurement Module) (3) is to be connected is indicated on the screen with a capital letter: A, B or C.

Do not stress the belt several times repeatedly, since the necessary minimum time for the DDS diagnosis instrument to take a reading is 1 second.

The tension values are those detailed in Sect. C 1.1, Timing system/valves and must be checked when the engine is cold: apply the installation values when fitting a new belt, and the reset values when belt tension reaches 70 Hz.

The timing belts can become slack during normal operation. When checking belt tension, if the reading is less than 70 Hz, restore to the specified nominal values (Sect. C 1.1, Timing system/valves).

Once belt tension is correct, tighten the screws (25) to the specified torque (Sect. C 3, Engine torque settings).

The linear throttle position sensor is mounted on the throttle body and cannot be adjusted. It is therefore necessary to teach the ECU the angle corresponding to the zero position of the position sensor itself, as follows.

In this position you can teach the ECU the angle of the position sensor. To do this, use the DDS diagnosis instrument and follow the procedure described below.

Turn on the DDS diagnosis instrument (1) referring to the paragraph “Tester power supply”.

Connect the power and diagnostics cable (2) to the diagnostics connector (A) on the tester and to the diagnostics socket (B) under the seat.

Press the “Select vehicle” icon and, on the next screen, press the “Select motorcycle” icon; select the motorcycle model and confirm, then select the version and confirm.

Select “Engine electronics” and press the “Confirm” icon (B). Next, press the “Self-diagnosis” icon to access the corresponding function.

The DDS diagnosis instrument will interrogate the electronic control unit and display the parameters analysed with their relative values.

Select the option “Self-adaptation of the throttle position sensor (TPS)” and then press the icon “Apply”.

On completion of the operation, the message “Was the operation completed successfully?” will appear; press “Confirm” (B).

If any problems were encountered during the operation, the tester will display the relative error messages: each message must be confirmed (by pressing the “Confirm” icon (B)), or rejected (by pressing the “Exit” icon (C)).

Once the reset has been performed, the ECU will be associated with the motorcycle’s throttle body. Replacement of the throttle body, the throttle position sensor or the ECU must always be immediately followed by a new reset procedure.

Connect the inserts of the exhaust gas analyser code 88713.1010 to the outlets on the exhaust pipes using the fittings (26).

Start the engine and wait for the engine temperature to reach 100 °C. When engine temperature reaches 100° C, start the fol­lowing adjustment procedure.

Idle speed shall be between 1,250 and 1,350 rpm (1,300±50):

If the engine is shut off before proceeding with adjustment of the CO level, wait three minutes after restarting for the enrichment phase to finish and the lambda sensors to start operating.

If idling rpm is too high and by-pass screws adjustment was not effective, make sure that parts below throttle are sealing cor­rectly, in particular check for cracks or fissures in the intake manifolds make sure they are securely fastened to the engine, check for cuts in the pressure sensor hoses, etc.

Idle speed adjustment takes priority over balancing the vacuum pressures downstream of the butterfly valve. Differences in pres­sure between the horizontal and vertical cylinder are therefore acceptable, provided that the idle speed is adjusted correctly.

Connect the Measurement Module cable (3) to the Measurement Module connector on the DDS diagnosis instrument as de­scribed in the paragraph “Description of the Ducati Diagnostic System tester”.

Turn on the DDS diagnosis instrument referring to the paragraph “Tester power supply”. Enter the “Measurement module” function. Press the “Cylinder synchronisation” icon.

The socket to which the Measurement Module cable (3) is to be connected is indicated on the screen with a capital letter: A, B or C.

The values may be displayed in two different ways: in numerical form or in graphic form; to select the desired display type, press the “Value display” icon (F).

To adjust the balance (consider a tolerance between 260 and 270), turn the by-pass screws (21) and (22) until the two lines on the graph coincide, if in graphic mode, or until identical numerical values are displayed, if in numerical mode.

Balance is obtained when the two lines of the graph nearly coincide or when the two indicated values are within the tolerance range.

Insert the fitting (9) into the connection on the hose (12), interposing the two copper sealing washers (22). Screw the connector (9) of the hose (12) into the threaded hole (M10x1 mm) in the RH cover. Refit the pressure switch (21) on the fitting (9) along with its seal, and reconnect the wiring connector (A).

Turn on the DDS diagnosis instrument (1) referring to the paragraph “Tester power supply”.

Connect the power and diagnostics cable (Measurement Module) (3) to the measurement module connector (B) on the DDS di­agnosis instrument (1).

On the DDS diagnosis instrument (1), select the “Measurement module” function by pressing the corresponding icon; then press the “Pressure Test” icon (D) followed by the “Start” icon (E).

The values may be displayed in three different ways: in one numeric form and in two graphic forms; to select the desired display type, press the “Value display” icon.

The measured value is indicated alongside the letter (A) or (C) identifying the cable used for the measurement: i.e. if you used connector (A) of the cable (3), the value measured will displayed next to the letter (A) on the screen.

Warm engine
(Minimum oil temperature = 80 °C)

1,100 to 1,300 rpm
over 0.8 bars

3,500 to 4,000 rpm
over 4 bars

The maximum pressure must never exceed 6.0 bar.

Excessively high pressure may indicate that the relief valve is stuck. Excessively low pressure, on the other hand, may be caused by the relief valve being stuck in the open position, the relief valve spring being too weak, or a faulty oil pump. Other causes are excessively worn seals and gaskets or a badly worn engine.

Remove the tool and refit the pressure switch (21) along with its seal. Tighten it to the specified torque (Sect. C 3, Engine torque settings).

Engine performance is directly correlated to the pressure that can be measured in the combustion chambers of the two cylinders. Pressure which is too high/low or an excessive difference between the two cylinders will cause a drop in engine performance and can cause engine breakdowns.

Turn on the DDS diagnosis instrument (1) referring to the paragraph “Connection to the motorcycle”.

Connect the power and diagnostics cable (Measurement Module) (3) to the measurement module connector (B) on the DDS di­agnosis instrument (1).

Connect the pressure sensor (5) to socket (A) of the cable (3).

On the DDS diagnosis instrument (1), select the “Measurement module” function by pressing the corresponding icon; then press the “Cylinder Compression” icon (D) followed by the “Start” icon (E).

In order to check the valve clearances, it is necessary to gain access to the four valve covers on the cylinder heads and then remove the parts listed below.

Open the lock and simultaneously apply downward pressure in the area of the catch to release the pin; Pull the seat backwards to release it from the front catches and remove it.

Remove the tank covers (Sect. E 2, Removal of the fuel tank fairings).

Raise the tank but leave it connected to the fuel system and wiring then position it on the side, duly supported, to be able to work on the fuel system flange.

Use the fuel pressure pipe (17) connecting one end (D) to the coupling of the delivery pipe to the tank and the other end (E) to the fuel delivery pipe (28): in this way you create a pressure pick-up socket (F).

Turn on the DDS diagnosis instrument (1) referring to the paragraph “Tester power supply”.

Connect the power and diagnostics cable (Measurement Module) (3) to the measurement module connector (E) on the DDS di­agnosis instrument (1).

On the DDS diagnosis instrument (1), select the “Measurement module” function by pressing the corresponding icon; then press the “Pressure Test” icon (F) followed by the “Start” icon (G).

The socket to which the cable (Measurement Module) (3) is to be connected is indicated on the screen with a capital letter: A, B or C.

The values may be displayed in three different ways: in one numeric form and in two graphic forms; to select the desired display type, press the “Value display” icon (H).

The measured value is indicated alongside the letter (A) or (C) identifying the cable used for the measurement: i.e. if you used connector (A) of the cable (3), the value measured will displayed next to the letter (A) on the screen.

The maximum pressure must be equal 3 bar (nominal).

On completion of the test, remove all the components of the test instrument, refit the fuel feed pipe (28) securing it with the clamp.

Refit the tank, ensuring to lay the lambda sensor cable (25) into the relevant tab on the tank flange cover and set the fuel pump connector (26) against the vertical head.

Fix the tank to the frame inserting the screw (21) with washer (22) and tightening it to the specified tightening torque (Sect. C 3, Frame torque settings).

Tighten the screw (24) to the specified tightening torque (Sect. C 3, Frame torque settings) while holding with a size 5 Allen wrench the threaded insert (27) located on the top of the tank.

Refit tank covers (Sect. E 2, Refitting the fuel tank fairings).

Refit the seat inserting the front ends of the seat base into the tabs on the tank, then push the rear end of the seat until you hear the bolt in the lock click into place.

In the event of a malfunction of the immobilizer system, it is possible to start the engine using the emergency procedure de­scribed in Section P 8, immobilizer and transponder, which requires a secret code that can be entered using the DDS diagnosis instrument.

Turn on the DDS diagnosis instrument (1) referring to the paragraph “Tester power supply”.

Connect the power and diagnostics cable (2) to the diagnostics connector (H) on the tester and to the diagnostics socket (L) on the motorcycle.

Press the “Select vehicle” icon and, on the next screen, press the “Select motorcycle” icon; select the motorcycle model and confirm, then select the version and confirm.

Select “Engine electronics” and press the “Confirm” icon (B). Next, press the “Self-diagnosis” icon to access the corresponding function.

The DDS diagnosis instrument will interrogate the electronic control unit and display the parameters analysed with their relative values.

A screen will appear in which you can enter the 5 digit secret code. Use the red arrows (E) and (F) to enter each digit: after entering each digit, press the “Confirm” icon (B).

If any problems were encountered during the operation, the tester will display the relative error messages: each message must be confirmed by pressing the “Confirm” icon, or rejected by pressing the “Exit” icon (G).

The DDS diagnosis instrument guides the operator step-by-step through the various diagnostic procedures, providing descriptions and documentation for motorcycle components, wiring diagrams for the electronic systems and informa­tion on the locations of specific components.

Turn on the DDS diagnosis instrument (1) referring to the paragraph “Tester power supply”.

Connect the power and diagnostics cable (2) to the diagnostics connector (F) on the tester and to the diagnostics socket (G) on the motorcycle.

Press the “Select vehicle” icon and, on the next screen, press the “Select motorcycle” icon; select the motorcycle model and confirm, then select the version and confirm.

To determine whether the system has any internal problems, you can access the “Self-diagnosis” function by pressing the cor­responding icon. If any errors are present, the symbol (D) will be displayed. To determine the type of errors present, press the “Errors” icon (E). Once errors have been detected, you can then resolve them through the guided diagnosis procedure; the “Guided Diagnosis” icon (C).

The DDS diagnosis instrument will interrogate the electronic control unit and display the parameters analysed with their relative values.

You can determine the engine rpm required for generator to produce just enough current to charge battery, feed the injection ignition system and all electric items fitted to motorcycle. When applied to a cable, the clamp-type amperemeter (18) detects the magnetic field generated by the current passing through that cable.

Remove the fuel tank (Sect. L 2, Removal of the fuel tank).

Turn on the DDS diagnosis instrument (1) referring to the paragraph “Tester power supply”.

Connect the power and diagnostics cable (Measurement Module) (3) to the measurement module connector (D) on the DDS di­agnosis instrument (1).

Insert the clamp-type amperemeter into the battery positive terminal lead with the arrow on the clamp pointing towards the bat­tery positive terminal (+).

On the DDS diagnosis instrument (1), select the “Measurement module” function by pressing the corresponding icon; then press the “Ammeter” icon (F) followed by the “Start” icon.

The socket to which the cable (Measurement Module) (3) is to be connected is indicated on the screen with a capital letter: A, B or C.

If the measured current is a positive quantity, it means that generator is feeding all electric items and charging battery at the same time. If the current has a negative sign, this means that the charging system is not able to power the electrical loads and a sig­nificant amount of the current required must be supplied by the battery, which is therefore discharging.

If polarity is reversed when clamping the ammeter onto the cable, the sign of the readings will also be reversed, giving rise to incorrect diagnosis.

Turn on the DDS diagnosis instrument (1) referring to the paragraph “Tester power supply”: use power supply (13).