Test requirements

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

Battery Positive Voltage (B+) OK
Supply voltage and fuses for respective system OK
See appropriate System Wiring Diagrams article.

Ground (GND) connectors for transmission OK

Check GND connections for corrosion and damage and repair if necessary.
Check TCM GND connection per wiring diagram.
Check battery GND strap and GND strap between battery and transmission.

Selector lever in "P" position
Parking brake applied
Ignition switched off

Connect VAG 1551 ((VAG 1552) scan tool to 16-pin Data Link Connector (DLC) to left of steering column, using adapter cable VAG 1551/3.

Fig 1: Connecting VAG 1551 (VAG 1552) Scan Tool To 16-Pin Data Link Connector (DLC)

NOTE:

If nothing is shown on the display, check the power supply to the DLC.
See appropriate System Wiring Diagrams article.
Additional operating instructions can be obtained by pressing the HELP button on the VAG 1551 scan tool.
Press the => button to advance through the program sequence.
See VAG 1551 scan tool operating instructions .

Indicated on display:

Fig 2: VAG 1551 Scan Tool Display - Connecting And Selecting Function (1 Of 10)

Operating modes 1 and 2 are displayed alternately.

Switch ignition on.
Operate brake pedal one time.
Press PRINT button to switch printer on (indicator light in button comes on).
Press button -1- to select "Rapid data transfer" operating mode 1.

Indicated on display

Fig 3: VAG 1551 Scan Tool Display - Connecting And Selecting Function (2 Of 10)

NOTE:

After address word 33 is inserted and confirmed with the -Q- button, the OBD program can begin. For OBD functions, see ON BOARD DIAGNOSTIC (OBD II), FUNCTIONS .
After address word 00 is inserted and confirmed with the -Q- button, the automatic test sequence can begin (the DTC memory for every system is checked). Stored malfunctions are displayed in sequence and printed out.

Indicated on display:

Fig 4: VAG 1551 Scan Tool Display - Connecting And Selecting Function (3 Of 10)

Operating modes 1 and 2 are displayed alternately

Press button -1- to select "Rapid data transfer" operating mode 1.

Indicated on display

Fig 5: VAG 1551 Scan Tool Display - Connecting And Selecting Function (4 Of 10)

Press buttons -0- and -2- to insert "Transmission Electronics" address word 02.

Indicated on display

Fig 6: VAG 1551 Scan Tool Display - Connecting And Selecting Function (5 Of 10)

Press -Q- button to confirm input.

Indicated on display (control module identification)

Fig 7: VAG 1551 Scan Tool Display - Connecting And Selecting Function (6 Of 10)

TCM identification

The transmission control module identification is dependent on manufacture status (data status). A control module identification may appear which is different than that in this example. For TCM applications, see parts catalog.

TCM IDENTIFICATION: EXAMPLE

8D0927156N	Part number
AG501V	Automatic transmission 5 speed 01V
3.7I2V	Engine type: 3.7 liter 2 valve
US	Market: USA
D74	EPROM (data status)
Coding 00000	Code: USA
WSC 12345	Dealership code of VAG 1551 scan too I with which last coding was carried out

CAUTION: Part numbers are listed here for reference only. Always check with your Parts department for the latest information.

If "Control module does not answer" is indicated on display:

Fig 8: VAG 1551 Scan Tool Display - Connecting And Selecting Function (7 Of 10)

A list of the possible malfunction causes can be printed out by pressing the HELP button.

After eliminating possible malfunction causes:

Again press buttons -0- and -2- to insert "Transmission Electronics" address word 02.

If "Control module does not answer" is again indicated on display:

Fig 9: VAG 1551 Scan Tool Display - Connecting And Selecting Function (8 Of 10)

Check power supply by conducting electrical test step 1, see ELECTRICAL TESTING .
Check wiring connection to DLC.

See appropriate System Wiring Diagrams article.

Check DTC table. See DTC TABLE ; DTC 65535, "Control Module Malfunctioning."
Press --> button.

Indicated on display

Fig 10: VAG 1551 Scan Tool Display - Connecting And Selecting Function (9 Of 10)

A list of the possible functions can be printed out by pressing the HELP button.