Dds Diagnosis Instrument; Checking And Adjusting Timing Belt Tension - Ducati Diavel Workshop Manual

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

DDS diagnosis instrument

The main functions of the DDS diagnosis instrument can be summarised as follows:
- Retrieval of errors (faults) of the ignition-injection system stored in the engine control unit memory and their subsequent
deletion, if required.
- Reading of engine parameters (rpm, coolant and air temperature, atmospheric pressure, throttle opening, battery
voltage, injection times and ignition advance, etc.).
- Active diagnostics. Activation of ignition-injection system transducers to test functionality and control signals (fuel pump,
ignition coils, rev counter, injectors, etc.). With this function it is also possible to enter the code to override the
immobilizer.
- Road test. Allows the technician to store engine parameters recorded within a previously specified engine speed range
interval. The resulting parameters can then be analysed and displayed once they have been acquired.
- With specific sensors connected, the DDS diagnosis instrument can read electrical voltages, current, temperature, timing
belt tension, and pressure values (lubrication and fuel supply circuits for example).

Checking and adjusting timing belt tension

Note
The on-screen icons used during this procedure are explained in a table at the end of this section.
Note
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. The DDS shall be connected with an optical reader (1) part
no. 88765.1371. 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.
Operations
Remove the timing belt covers
Position the crankshaft so that the piston of the horizontal cylinder is at TDC of its power stroke.
This is achieved by aligning the timing mark (C) of the timing driveshaft pulley (16) with the reference notch (D) on the
clutch cover (17).
Section reference
9 - 4.2, Removal of the timing belt
covers