Automatic test sequence

The automatic test sequence checks all the Diagnostic Trouble Code (DTC) memories of the control modules.

Before selecting the transmission control module ("transmission electronics") perform the automatic test sequence. DTCs of other control modules can influence the transmission control module. This is especially valid on vehicles with data bus.

• Switch ignition on.

Indicated on display

1) Is displayed alternately

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

Indicated on display

• Press key -0- twice; 00 to select "automatic test sequence" function.
• Confirm entry with Q key.

All control module identifications, together with entries which may be in the DTC memory, are displayed.

After test sequence, V.A.G 1551 returns to following start position:

Indicated on display

1) appears alternately

Select transmission control module 

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

Indicated on display

• Press keys 0 and 2 to select address word "Transmission electronics".

Indicated on display

• Confirm entry with key Q.

Indicated in display

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

Example for control module identification 

Depending upon build level (program level) the control module can indicate a different control module identification to that shown in the example. Application of control module see Parts catalog.

• 09A 927 750: Part No.
• AG5 Transmission 09A: 5-speed automatic transmission 09A
• 0004: EPROM (program level)
• Coding 00000: is not required at present

• WSC 00000: V.A.G 1551 dealership number where last coding was performed

Indicated on display

• Press HELP key and a list of possible causes is printed out.
• Eliminate possible causes, again enter address word 02 for "transmission electronics" and confirm with Q key.

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

Indicated on display

• Check wiring connections to DLC.

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder

• Check control module voltage supply.

Perform test step 1. Refer to Transmission electrical check  , Electrical check

• DTC table. Refer to Diagnostic Trouble Code (DTC) table  under DTC 65535 control module faulty!
• Press → key.

Indicated on display

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