Scan Tool Connecting and Initial Checks
CONNECTING VAG 1551 SCAN TOOL AND SELECTING FUNCTION
Special tools, testers and auxiliary items
- VAG 1551 scan tool with cable VAG 1551/3
NOTE: The VAG 1552 vehicle system tester can be used instead of the VAG 1551 scan tool, however a print-out is not possible.
Test conditions
- Fuse 21 OK
- Battery positive voltage (B+) at least 11 volts
- Ground connections on engine and transmission OK (Engine ground connection: See item 22), refer to "Multiport Fuel Injection System Components Overview". Locations
Work sequence
- Remove cover for Data Link Connector (DLC).
- Connect VAG 1551 scan tool with VAG 1551/3 adapter cable.
Depending upon the desired function:
- Switch ignition on
or
- Start engine. See Engine Control Module (ECM) functions table, refer to "On-Board Diagnostic Function". Description and Operation
NOTE:
- If the display is not as indicated in the work sequence: See VAG 1551 scan tool operating instructions.
- If due to an input malfunction "Error in communication link" is displayed, disconnect wire from VAG 1551 scan tool, reconnect and repeat work step.
- Operate VAG 1551 scan tool taking into account information on the display:
- Press button -1- to select "Rapid data transfer" operating mode.
- Press buttons -0- and -1- to insert "Engine Electronics" address word 01.
- Press -Q- button to confirm input.
037 906 258K Engine 20Q 400101-S ->
Coding 2 AG
ECM identification and coding indicated on display, e.g.:
- 037 906 258K = ECM Part No. (for latest version see parts catalog microfiche).
- Engine 20Q = 2.0 liter cross-flow engine
- 400101-S = Program level number and version
- Coding 2 AG = Coding variants
ECM coding:
Coding For vehicles with
1 HS Manual transmission with EGR and secondary air system
2 AG Automatic transmission with EGR and secondary air system
NOTE: Correct ECM identification and coding are shown only at idle.
If the coding differs from the vehicle version, then:
- Check ECM coding. Programming and Relearning
- Press -> button.
Indicated on display:
Rapid data transfer HELP
Select function XX