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Connecting VAG 1551 Scan Tool




VAG 1551 And Motronic Engine Control Module (ECM) -J220-, Connecting And Selecting

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required







- VAG 1551 scan tool

NOTE:
- The vehicle system tester VAG 1552 can be used instead of the VAG 1551 scan tool, however a print-out is not possible.
- All functions of VAG 1551/1552 can also be carried out with the vehicle diagnostic, testing and information system VAS 5051. Connecting VAS 5051 Connecting VAG 5051 Scan Tool.







- VAG 1551/3 Adapter cable


Test prerequisites







- The fuses must be OK.







- The main fuses must be OK.
- The battery voltage must be at least 11.5 V.
- Ground (GND) connection between engine and body must be OK.
- All electrical devices, e.g. lights and rear window heating must be switched off.
- If the vehicle is equipped with air conditioning, it must be turned off.
- Selector lever must be in position "P" or "N" on vehicles with an automatic transmission.

Work sequence







- Connect VAG 1551 scan tool ((VAG 1552) with cable VAG 1551/3.
After the scan tool has been connected:
- Depending upon desired function:
Switch ignition on or Start engine, Table "Selectable functions". Selectable Functions When Using VAG1551/1552 or VAS5051

NOTE:
- If the display remains blank, check voltage supply for DLC:
- If the display does not indicate as described in the work sequence:
See Scan tool operating instructions
- If due to an input malfunction "Fault in the data transfer!" is displayed, pull wire off scan tool, reconnect and repeat work step.
- Operate scan tool taking into account the information on the display:

Indicated on display:


VAG SELF-DIAGNOSIS HELP
1 - Rapid data transfer*
2 - Flash code output*

* Appears alternately


- Operate scan tool, taking into account the information on the display:
- Press button -1- for "Rapid data transfer".
- Press buttons -0- and -1- for address word "Engine electronics" and confirm entry with -Q- button.

The control module identification and coding are shown on the display,
e.g.:


022906032BL MOTRONIC ME7.1.1 G 0006 ->
Coding 00032 WSC 00000


- 022 906 032 BL Part No. of the control module (for latest control module version:)
See Parts catalog
- MOTRONIC ME7.1.1 = System designation (Motronic)
- G = Cruise control system (CCS) activated
- 0006 = Program level number
- Coding 00032 = control module coding, coding variants of Motronic Engine Control Module (ECM) -J220-.
- WSC 00000 = Workshop code of VAG 1551 with which the last coding was carried out. (If the factory coding has not been changed, WSC 00000 appears)

NOTE: Replace control module if the control module version displayed does not correspond to the vehicle

A wrong coding of the Engine Control Module results in:
- Engine running Diagnostic Trouble Codes (DTCs) (gear change jerks, load change jerks, etc.)
- Increased fuel consumption
- Increased exhaust gas emissions
- Diagnostic Trouble Codes (DTCs) stored in DTC memory which are not actually present (false DTCs)
- Functions will not be performed (Oxygen Sensor (O2S) control, activation of the Evaporative Emissions (EVAP) Canister system, etc.).
- Reduced service life of transmission

If the coding differs from the vehicle version, then:
- Checking control module coding, coding Motronic Engine Control Module (ECM) -J220-.
- Press the -> button.

Indicated on display:


Rapid data transfer HELP
Select function XX


- Further measures see repair procedures.
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