Scan Tool Connecting and Initial Checks
VAG 1551 Scan Tool, connecting
Address Word 01 "Engine electronics", selecting
Special tools, testers, required
- VAG 1551/1552 Scan Tool using VAG 1551/3 adaptor cable
NOTE: The VAG 1552 Scan Tool can be used instead of the VAG 1557, however; the VAG 1552 does not have printing capability.
Test conditions
- Fuses 12,28,29,32 and 34 OK.
- Battery voltage must be 11.5 Volts minimum
- Ground connections: right engine mount and on body OK. Body Ground connection (item 21).
Work sequence
- Connect VAG 1551 Scan Tool using VAG 1551/3 adaptor cable
After Scan Tool has been connected:
Depending upon desired Function:
Switch ON ignition
or
Start engine, Selectable Functions, table Selectable Functions When Using VAG1551/1552 or VAS5051
NOTE:
- If display still blank, check Data Link Connector voltage supply
- If due to an input error "Fault in data transfer" is displayed, disconnect Scan Tool, reconnect and repeat work step.
- Operate Scan Tool taking the displayed information into account
Display will appear as shown
VAG - On Board Diagnostic II HELP
1 - Rapid data transfer*
2 - Blink code output*
*Display alternately flashes lines 1 and 2
- Operate Scan Tool taking the displayed information into account
- Press button 1 to select "Rapid data transfer" mode
- Press buttons 0 and 1 to select address word 01 "Engine electronics"
- Press Q button to enter input
ECM identification and coding will be shown on the display:
8D0 907 557N 1.8LR4/5VT MOTR AT D03 ->
Coding 06051 WSC XXXXX
- 8D0 907 557 N = ECM Part No. (for latest ECM version see parts catalogue)
- 1.8 ltr. = Engine displacement
- R4/5VT = Engine configuration (4-Cyl. in-line engine, 5 valve)
- MOTR = System designation (Motronic)
- HS = Manual transmission, AT = Automatic transmission
- DO3 = Program level number
- Coding xxxxx = ECM coding, table, Engine Control Module, Coding Variants
- WSC xxxxx = VAG 1551 Workshop code
If factory coding has not been changed, WSC 00000 appears
NOTE: Replace ECM if displayed ECM version does not correspond to the vehicle.
An incorrectly coded Engine Control Module leads to:
- Increased levels of exhaust emissions
- Engine running malfunctions (gear shift jerking, load change jerks, etc.)
- Increased fuel consumption
- Malfunctions stored in DTC memory that have not actually occurred.
- Functions will not be performed (Oxygen sensor control, EVAP system activation, etc.).
- Reduced transmission life
If the coding differs from the vehicle version
- Check ECM coding. ECM, Coding
- Press -> button.
Display will appear as shown
Rapid data transfer HELP
Select Function XX