Connecting fault reader V.A.G 1551 and selecting functions unit — VW

Special tools, workshop equipment, test and measuring appliances and auxiliary items required

V.A.G 1551 Fault reader

Note:

All functions which could previously be performed with the testers V.A.G 1551/1552 can also be performed with the new tester VAS 5051/5052.

V.A.G 1551/3 Diagnosis cable

combined with:

V.A.G 1551/7 Adapter

and

V.A.G 1551/8 Adapter

or the following combination of tools:

Diagnosis wiring V.A.G 1551/1 and adapter V.A.G 1551/7

Note:

In the repair group 01 the diagnosis sequence is only described for both diagnostic cables V.A.G 1551/1 and 1551/7 together.

Test prerequisites

Earth connections to battery and between engine and body OK

Procedure

Remove diagnosis connections cover -arrow- at the heat shield in the engine compartment on the upper left side.
Connect fault reader V.A.G 1551 to diagnostic cable V.A.G 1551/1.

Diagnostic cable V.A.G 1551/1 (white and black connection) to adapter wiring V.A.G 1551/7.

Connect 3-pin connector -1- from adapter cable V.A.G 1551/7 to diagnosis connection -2- in engine compartment.

V.A.G - SELF-DIAGNOSIS
HELP
1 - Rapid data transfer*
2 -Flash code output*
Indicated on display (*alternates between displays):

Note:

If the display remains blank, disconnect adapter cable V.A.G 1551/7 and check voltage supply to diagnosis connection (wiring grey/white). See fig. 10, injection system Digifant.
If the display does not indicate as described in the work sequence:

=> Fault reader operating instructions

With the HELP key at the fault reader you can select more operating instructions.

If due to an input fault "Fault in the data transfer!" is displayed, pull cable off fault reader, reconnect and repeat work step.

Depending upon function desired:
Switch ignition on
or
Start engine => page
01-3
, Table "Selectable functions".

Press key 1 for "Rapid data transfer" mode.

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

Press keys 0 and 1 (01 enters the address word "Gearbox electronics").

Rapid data transfer
Q
01 - Engine electronics
Indicated on display:

Confirm entry with Q key.

043 906 022 E ......Digifant 1.82............3684
Control unit identification is shown on the display, e.g.:

043 906 022 E= Part No. of the control unit (for latest control unit version see parts catalogue)
Digifant 1.82= Exhaust gas system
3684 = Programme level number

Rapid data transfer
HELP
Control unit does not answer!
Indicated on display:

By pressing the "HELP" key a list of possible fault causes is printed out.
After rectifying the possible causes of the fault, once again enter the address word 01 for "Engine electronics" and confirm with the Q key.

Rapid data transfer
HELP
Select function XX
Indicated on display:

Further measures see repair procedures.