With MMS 300 Engine Management System

VAG 1551 Scan Tool (ST), Connecting

Requirements
- Fuses 13, 21, 27, 28 and 32 in central electric panel OK
- Fuel Pump (FP) relay OK.

Procedure

- Switch OFF ignition

- Connect Scan Tool VAG 1551 using adaptor cable VAG 1551/1 to DLC.

Fuse/Relay Panel:

- First connect black adaptor cable connector (voltage supply) to DLC # C. These displays appear alternately as shown:

VAG self-diagnosis HELP
1 - Rapid data transfer

OR

VAG self-diagnosis HELP
2 - Blink code output


Note: Do not connect the white adaptor cable connector if there is no display. Instead, check the voltage supply for the scan tool, Refer to Data Link Connector / Testing and Inspection. Testing and Inspection

- Connect white adaptor cable connector to DLC # D.

- The blue connector is not used

- To obtain additional operating instructions press the HELP button.

- To step through the program sequence, press the arrow button

Selectable Functions

- Depending on which function is required; either switch ON ignition or start engine and let idle

DTC memory reading and erasing (function 02):

- Check with engine idling.

Note: If engine does not start, crank engine 4 to 6 seconds and leave ignition switched ON.

Output Diagnostic Test Mode (function 03):

- Switch ignition ON, but do not start engine.

Basic Setting (function 04):

- Let engine idle or switch ignition on.

Erase DTC Memory (function 05):

- Check with engine idling, leave ignition switched on after checking the DTC memory.

End Output (function 06):

- Engine idling or ignition on.

Code Control Module (function 07):

- Switch ignition ON.

Read Measuring Value Block (function 08):

- Let engine run and/or switch ignition ON.

Read Individual Measuring Values (function 09):

- Let engine idle at operating temperature.

Adaptation (function 10):

- Let engine idle.

Operating Mode

- Press button 1 to select operating mode "Rapid data transfer", Display will appear as follows:

Rapid data transfer HELP
Enter address word XX

OR

- Press button 2 to select operating mode "Blink code output", Display will appear as follows:

Blink code output HELP
Activate with (arrow) key

Rapid data transfer

After selecting operating mode Rapid data transfer select diagnostic function.

- Engine Electronics 01
- Transmission Electronics 02

- Press 0 and 1 buttons to select address word 01 "Engine electronics".Display will appear as follows:

Rapid data transfer Q
01-Engine electronics

- Press Q button to enter input. The engine control module identification number is indicated via the display, for example: 8A0 906 266 B. Display will appear as follows:

8A0906266B V6 2.8 2V MPI V6 AC39 DOB
Coding 003 WSC 06812

- Display breakdown is as follows:

^ ECM identification: 8A0 906 266 B (example)
^ Engine design: V6
^ Engine displacement: 2.8 liter
^ Number of valves per cylinder: 2 valves
^ Fuel injection system: MPI = Multi-Point Injection
^ ECM software version: V6 (EPROM status of ECM)
^ ECM hardware/software version: DOB (ECM program status)
^ Coding: 003
^ Dealer number whose VAG 1551 scan tool was used to carry out the last coding or adaptation: WSC ______

- Check for correct ECM coding, Refer to ECM Coding ECM Coding (Function 07)

Note: Only during idle speed do correct specifications regarding the engine control module number and related coding occur.

- Press (arrow) button. If display appears as follows:

Rapid data transfer HELP
ECM does not answer\


- Print out a list of possible causes by pressing the VAG 1551 HELP button

- After eliminating possible causes, reselect operating mode and address word, display appears as follows:

Rapid data transfer HELP
Select function XX

- Select function code.

- Diagnostic Trouble Code Memory 02
Reading Diagnostic Trouble Codes
- Output Diagnostic Test Mode 03
Output Diagnostic Test Mode (DTM)
- Basic Engine Setting 04
Basic Setting (Function 04)
- Erase DTC Memory 05
Clearing Diagnostic Trouble Codes
- End Output 06
End Output (Function 06)
- Code Control Module 07
ECM Coding (Function 07)
- Read Measuring Value Block 08
Read Measuring Block Values (Function 08)
- Adaptation 10
Adaptation (Function 10)

- Press Q button to enter input and see the proper procedure article for your selection

Note: If function 02 Check DTC memory is to be selected

- Switch on the printer using the print button, lamp in print button lights

- When the printer is switched ON stored malfunctions are automatically printed out in sequence