Connecting fault reader V.A.G 1551 and selecting engine control unit — AUDI

ARM
Note:

The vehicle system tester V.A.G 1552 can be used instead of the fault reader V.A.G 1551, however a print-out is not possible.

Test conditions

Battery voltage at least 11 V
Earth connections on engine and gearbox OK.
Fuse OK.

Open rear ashtray and remove cover for diagnostic connector.

Connect fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3.

V.A.G - SELF-DIAGNOSIS
HELP
1 - Rapid data transfer
2 - Flash code output
Indicated on display:

Note:

If using V.A.G 1551 and test cards with program levels from -D/5.0- onwards the engine control unit can be selected directly via "Rapid data transfer". The self-diagnosis function can be used with program levels from -D/6.0- onwards.

Note:

If the display remains blank:

=> Fault reader operating instructions

Depending on the function required:

Switch ignition on.

or
Start engine => Page
01-3
, Table "Selectable functions".

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

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

Rapid data transfer
Q
01 - Engine electronics
Press keys 0 and 1 for address word "Engine electronics" and confirm entry by pressing the Q key.

Rapid data transfer
HELP
Control unit does not answer
If the display shows one of the messages reproduced here, run through the fault-finding procedure as described in the Fault-Finding Programme for diagnosis wiring.

=>
Rapid data transfer
HELP
Fault in communication build up
Current Flow Diagrams, Electrical Fault-Finding and Fitting Locations

Rapid data transfer
HELP
K wire not switching to earth

Rapid data transfer
HELP
K wire not switching to positive

3B0907557A
1.6l R4/2V SIMOS HS D01 ⇒
Coding 00000
WSC XXXXX
The control unit identification will appear on the display of the V.A.G 1551. For example:

3B0 907 557 A = Part No. of the control unit (see Parts List for latest control unit version)
1.6 ltr. = engine capacity
R4/2V = engine type (in-line engine, 4-cyl., 2 valves per cylinder)
SIMOS = designation of injection and ignition system
Si-Mos =SiemensMotorsteuerung (engine management)
HS = manual gearbox (hand shift)
AT = automatic gearbox
D.. = data level (software version) of control unit
Coding = coding variant of control unit
=> Page
01-61
.
WSC = Workshop code

If the coding differs from the vehicle version, then:

Check control unit coding => Page
01-61
,
Coding Simos control unit
Press ⇒key.

Rapid data transfer
HELP
Select function XX
Indicated on display:

Note:

Press the HELP key to obtain a printout of the functions which are available.