VAG 1551 Scan Tool, connecting and selecting functions

WARNING: This page is about a different variant/trim than selected.

Safety precautions

Observe the following if test and measuring instruments are required during a test drive:

Test and measuring instruments must be secured to rear seat and operated by a 2nd person from this location.
If test and measuring instruments are operated from front passenger's seat and the vehicle is involved in an accident, there is a possibility that the person sitting in this seat may receive serious injuries when the airbag is triggered.

Test conditions

Vehicle voltage supply OK
Fuses No. 07, 11, 15 and 31 OK
Fuse in main fuse box (110 amps.) OK
Ground connections for transmission OK

Selector lever in "P" and parking brake applied

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

Ground connection points are located in the plenum area of the cowl and below the battery in the engine compartment.

Check battery Ground strap and Ground strap between battery and transmission.

Fig 1: VAG 1551 Scan Tool With VAG 1551/3 Connected To Data Link Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Locate Data Link Connector (DLC), left of steering column and under instrument panel, as shown in illustration.
Switch ignition off and connect VAG 1551 Scan Tool with adapter cable VAG 1551/3A.

Indicated on display

VAG - ON BOARD DIAGNOSTIC HELP
1 - Rapid data transfer1)
2 - Blink code output1)

1) appears alternately

NOTE:

Additional operating instructions can be retrieved by pressing the HELP key of VAG 1551.
The → key is used for advancing within the programma sequence.
An automatic check (buttons 00) can be selected in the operating mode 1 "Rapid data transfer". All vehicle control modules will then be checked automatically.

Refer to VAG 1551 Scan Tool operating instructions.

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

Indicated on display

Rapid data transfer HELP
Enter address word XX

Press buttons -0- and -2- to enter "transmission electronics" address word 02.

Indicated on display

Rapid data transfer Q
02 - Transmission electronics

Confirm entry with -Q- button.

Example:

Indicated on display

01M927733EF AG4 Transmission 01M
4093
Coding 00000 WSC 00000

The control module identification, the coding and the dealership number of the VAG 1551 are displayed.

Control module identification

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

01M 927 733 EF: Part No.
AG4 Transmission 01M: 4-speed automatic transmission 01M
4093: EPROM (Program level)
Coding 00000: is not required at present.

WSC 00000: VAG 1551 dealership number with which the last coding was performed.

Indicated on display

Control module does not answer! HELP

Press HELP button to print out a list of possible fault causes.
After eliminating possible causes of faults, again enter address word 02 for "transmission electronics" and confirm.

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

Indicated on display

Control module does not answer! HELP

Check control module voltage supply.

Perform test step 1. Refer to Transmission, electrical check , Electrical test.
Check wiring connections to Data Link Connector (DLC).

Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations binder

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

Indicated on display

Rapid data transfer HELP
Select function XX

Press HELP button to print out a list of possible functions.