A8 Quattro Sedan V8-4.2L (AUX) (2001)
/Page-94001.png)
Control Module: Service and Repair
Checking Control Unit Coding
NOTE: The VAG 1552 scan tool can be used instead of the VAG 1551, however no printout is possible.
Test Requirements:
-
Battery Positive Voltage (B+) OK
-
Supply voltage and fuses for respective system OK
-
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
NOTES:
-
If nothing is shown on the display check the power supply to the DLC.
-
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. => VAG 1551 scan tool operating instructions
Procedure:
-
Remove cover for 16-pin Data Link Connector (DLC) to left of steering column.
-
Connect VAG 1551 (VAG 1552) scan tool to DLC using adapter cable VAG 1551/3.
Indicated on display 1):
V.A.G. - On Board Diagnostic HELP
1 - Rapid data transfer
2 - Blink code output
1) 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:
Rapid data transfer HELP
Insert address word XX
NOTES:
-
After address word 33 is inserted and confirmed with the -Q- button, the OBD program can begin. OBD functions => See: Powertrain
Management/Transmission Control Systems/Testing and Inspection
-
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 1):
V.A.G. - On Board Diagnostic HELP
