Connecting fault reader V.A.G 1551 (or V.A.G 1552) and selecting functions — AUDI

01N
Test conditions:

Selector lever in position "P" and handbrake applied.
Vehicle voltage supply in order.
Fuses in order

=> Current flow diagrams, Electrical fault finding and Fitting locations

Earth connections and earthing point for gearbox in order

=> Current flow diagrams, Electrical fault finding and Fitting locations

Check earth connections for corrosion and poor contact; repair if necessary.

Check battery earth strap and earth strap between battery and gearbox.
Connecting fault reader:
With ignition switched off, connect fault reader V.A.G 1551 using diagnosis cable V.A.G 1551/3.

Note:

The diagnosis connection is in the knee padding at the front left.

V.A.G - SELF-DIAGNOSIS
HELP
1 - Rapid data transfer1)
2 - Flash code output1)
Indicated on display:

1)
appears alternately

Notes:

Additional operating instructions can be retrieved by pressing the HELP key of V.A.G 1551.
The ⇒ key is used for advancing within the programme sequence.
An automatictest sequence (keys 00) can be carried out in operating mode 1 "Rapid data transfer". This test interrogates all the control units in the vehicle automatically.

=> Fault reader V.A.G 1551 operating instructions.

Switch on ignition.
Switch on printer with the Print key (indicator lamp in key lights up).
Press key 1 for "Rapid data transfer" mode.

Rapid data transfer
HELP
Enter address word XX
Indicated on display:

Press keys 0 and 2. (Enter the address word "gearbox electronics" with 02.)

Rapid data transfer
Q
02 Gearbox electronics
Indicated on display:

Confirm entry with key Q.

01N927733BA AG4 Gearbox 01N
2754
Coding 00000
WSC 00000
Indicated on display:

The control unit identification, the coding and the dealership number of the V.A.G 1551 are displayed:

Control unit identification

Depending upon the control unit version (programme level) the control unit may indicate a different control unit identification to that shown in the example. Allocation of control unit => Parts catalogue.

01N 927 733: Part No.
AG4 Gearbox 01N: 4-speed automatic gearbox 01N
2754: EPROM (Programme level)
Coding 00000: is not required at present.
WSC 00000: V.A.G 1551 dealership number with which the last coding was performed.

Control unit does not answer!
HELP
Indicated on display:

By pressing the HELP key, a list of possible fault causes is printed out.
After eliminating the possible causes of faults, again enter the address word 02 for "gearbox electronics" and confirm.

If "Control unit does not answer!" again appears:

Control unit does not answer!
HELP
Indicated on display:

Check control unit voltage supply.

Perform test step 1 => Page
01-100
, Electrical check.
Check wiring connections to diagnostic sockets

=> Current flow diagrams, Electrical fault finding and Fitting locations

=> Fault table, Page
01-37
under fault code 65535 control unit faulty!
Press ⇒ key.

Rapid data transfer
HELP
Select function XX
Indicated on display:

After the HELP key is pressed, a list of the possible functions is printed out.