Audi Workshop Service and Repair Manuals

Notes:

• ◆ The final control diagnosis can only be performed with the engine stopped and the ignition switched on.
• ◆ The final control diagnosis will be terminated if the engine is started or if an engine speed pulse is detected.
• ◆ During the final control diagnosis, individual control elements continue to be actuated until the test programme is advanced to the next control element by pressing the ⇒ key.
• ◆ The control elements can be checked either by listening or by touching.
• ◆ Before repeating the final control diagnosis, without starting the engine briefly, switch off the ignition for approx. 20 seconds.
• ◆ The electric fuel pump runs continuously throughout the final control diagnosis.
• ◆ The final control diagnosis is terminated after 10 minutes.

The final control diagnosis activates the following components in the stated sequence:

1. Injector, cylinder 1 -N30

2. Injector, cylinder 2 -N31

3. Injector, cylinder 3 -N32

4. Injector, cylinder 4 -N33

5. -N80 solenoid valve 1 for activated carbon canister

6. -N75 solenoid valve for boost pressure control

• ‒ Connect the V.A.G 1551 fault reader (V.A.G 1552) and select the engine electronics control unit with the "Address word" 01. During this, the ignition must be switched on.
  (Connecting the fault reader and selecting the control unit for the engine electronics .)

• ‒ Press keys 0 and 3 for the function "Final control diagnosis".

• ‒ Confirm input with the Q key.

• ‒ Turn the throttle mechanism on the throttle valve control unit to open the idling switch.

• The injector should click five times.

• ‒ To switch to the next injector, press the⇒ key. (It is also possible to advance the programme without checking the injector in question.)
• ‒ Use this procedure to check all the injectors in sequence.

If one of the injectors is not actuated (does not click):

• ‒ Check the injectors => Page 24-23
• ‒ Press the ⇒key.

This solenoid valve will continue to be actuated (clicks) until the ⇒ key is pressed to switch to the next control element.

If the valve is not actuated (does not click):

• ‒ Check the -N80 solenoid valve for the activated carbon canister .
• ‒ Press the ⇒key.

This solenoid valve will continue to be actuated (clicks) until the ⇒ key is pressed to switch to the next control element.

Note:

The clicking of the valve is difficult to hear and it is therefore best checked by touch.

If the valve is not actuated (does not click):

• ‒ Check the solenoid valve for boost pressure control
  
• ‒ Press the ⇒key.

Note:

The final control diagnosis cannot be re-started until the ignition has been switched off briefly.