Volkswagen Workshop Service and Repair Manuals > Polo Mk3 > Power unit | Diesel direct injection and glow plug system up to 09.99 | Self diagnosis, V.A.G Inspection Service | Self-diagnosis | Connecting fault reader V.A.G 1551 and selecting engine electronics control unit

Connecting fault readerV.A.G 1551 and selecting engine electronics control unit

Connecting fault reader -V.A.G 1551- and selecting engine electronics control unit

Special tools and workshop equipment required

t	Fault reader -V.A.G 1551- with diagnosis cable -V.A.G 1551/3-

Note

The vehicle system tester -V.A.G 1552- can be used instead of the fault reader -V.A.G 1551-, however a print-out is not possible.

Test prerequisite

l	Battery voltage OK.

l	Earth connections on engine and gearbox OK.

l	Fuse 21 or 227 OK.

Procedure

–	Fold left storage compartment down.

–	Connect fault reader -V.A.G 1551- with diagnosis cable -V.A.G 1551/3-.

When the fault reader has been connected:

–	Depending upon desired function: Switch ignition on or start engine → Chapter, table “Selectable functions”.

Note

t	If the display does not indicate as described in the work sequence: → Fault readerV.A.G 1551 operating instructions

t	If due to an input fault “Fault in the data transfer!” is displayed, pull cable off fault reader -V.A.G 1551-, reconnect and repeat work step.

Indicated on display:

V.A.G SELF-DIAGNOSIS                HELP

 1 - Rapid data transfer*

Indicated on display:

¹⁾	Appears alternately

–	Operate fault reader 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 the input with Q button.

V.A.G SELF-DIAGNOSIS                HELP

 2 - Flash code output*

The fault reader -V.A.G 1551- display will show the control unit identification, e.g.:

t	038906013K = Part No. of the control unit (for up-to-date control unit version see parts catalogue)

t	1.9 l/1.7 l = engine displacement

t	R4 = type of engine (4-cyl. in-line engine)

t	EDC = Injection system (Electronic Diesel Control)

t	SG = Gearbox type: manual gearbox (AG = automatic gearbox)

t	1808 = Control unit software version

t	Coding 00005 = coding variant

038906013K  1.7l  R4  EDC   00SG 1808 ->

Coding 00005                    WSC 0000

Code number	For vehicles with
00001	Automatic gearbox (not relevant)
00002	Manual gearbox Engine codes AGD, AHG
00005	Manual gearbox Engine code AKU

t	WSC xxxxx = Workshop code from fault reader -V.A.G 1551- with which coding was last carried out. (If the factory coding has not been changed, WSC 00000 appears)

–	Press → button.

Indicated on display:

–	Further measures see repair procedures.

Rapid data transfer                 HELP

Select function XX

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