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

Connecting
fault reader
V.A.G 1551
and selecting engine electronics control unit
Special tools and workshop equipment required
Fault reader
V.A.G 1551
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.
All
fault reader
V.A.G 1551
and
vehicle system tester
V.A.G 1552
functions can also be carried out with the
vehicle diagnosis, testing and information system
VAS 5051
. Connect
vehicle diagnosis, testing and information system
VAS 5051
Chapter
.
Test prerequisites
Fuses No. 15, 23, 24, 32 and 37 must be OK.
Strip fuses in fuse box/battery OK.
The battery voltage must be at least 11.5 V.
Earth connections between engine and body must be OK.
All electrical consumers, e.g. lights and rear window heating, must be switched off.
Procedure
Remove ashtray
1
.
Connect
fault reader
V.A.G 1551
with
diagnosis cable
V.A.G 1551/3
.
After the
fault reader
V.A.G 1551
has been connected:
Depending upon desired function: Switch ignition on or start engine
Chapter
, table
“Selectable functions”
.
Note
If the display remains blank, check voltage supply for diagnostic connector:
Current flow diagrams, Electrical fault finding and Fitting locations
If the display does not indicate as described in the work sequence:
Fault reader
V.A.G 1551
operating instructions
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:
V.A.G SELF-DIAGNOSIS HELP
2 - Flash code output*
Appears alternately
Operate
fault reader
V.A.G 1551
taking into account the information on the display:
Press key 1 for
“Rapid data transfer”
.
Press keys
0
and
1
for address word
“Engine electronics”
and confirm the input with
Q
key.
The
fault reader
V.A.G 1551
display will show the control unit identification, e.g.:
038906012AS 1.7l R4 EDC 00SG 2536 ->
Coding 00002 WSC 0000
038906012AS = Part No. of the control unit (for up-to-date control unit version see parts catalogue)
1.7 l = engine displacement
R4 = type of engine (4-cyl. in-line engine)
EDC = Injection system (Electronic Diesel Control)
SG = type of gearbox: Manual gearbox
2536 = Control unit software version
Coding 00002 = control unit coding, coding variants of engine control unit
Chapter
.
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
→
key.
Indicated on display:
Rapid data transfer HELP
Select function XX
Further measures see repair procedures.