Connecting and Selecting Function
VAG 1551 Scan Tool, Connecting and Selecting FunctionRequirements
- Fuses 18 and 21 OK
- Ground connections OK (engine ground connection: at cylinder head cover on left and beneath lower section of the intake manifold).
- connect Scan Tool VAG 1551 using adaptor cable VAG 1551/1 as follows:
- First connect black adaptor cable connector (voltage supply) to black Data Link Connector (DLC).
- display will appear as shown.
Note: Do not connect the white adaptor cable connector if there is no display. Instead, check the voltage supply for scan tool, Refer to VAG 1551 Voltage Supply, Checking.
- connect white adaptor cable connector to the white/brown Data Link Connector (DLC) 2.
- The blue connector is not used
DLC Location Passat:
Note: The 16 pin DLC connector was phased in during the 1994 model year. If vehicle has the 16 pim DLC, connect VAG 1551 Scan Tool (ST) with VAG 1551/3 adaptor harness.
VAG 1551 Selectable Functions:
- depending on which function is required; either switch ON ignition or start engine and let idle
Note:
- To obtain additional operating instructions press the HELP button.
- To step through the program sequence, press the -> button
- press button 1 to select operating mode "Rapid data transfer",
- display will appear as shown
[ Rapid data transfer HELP ]
[ Enter address word XX ]
- press 0 and 1 buttons to select address word 01 "Engine electronics".
- display will appear as shown
[ 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: 021 906 258 F.
[ 021906258 F ENGINE ]
[ Coding 4 ]
Note: Only during idle speed do correct specifications regarding the engine control module number and related coding occur.
- press -> 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, press 0 and 1 buttons again to select address word 01 "Engine electronics"
- press Q button to enter input
- press -> button
- display will appear as shown
[ Rapid data transfer HELP ]
[ Select function XX ]
If function 02 "Read DTC memory" (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