engine VOLKSWAGEN JETTA 1998 Service Manual

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V.A.G 1551 scan tool, connecting
and selecting function


Note:
All functions that have so far been carried
out with V.A.G 1551 can now also be
carried out with the tester VAS 5051.

Special tools and equipment
V.A.G 1551 or V.A.G 1552 scan tool
vehicle system tester.
V.A.G 1551/3 or 1551/3A adapter cable
Стр. 5из 129 On Board Diagnostic (OBD), performing

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Note:

The ABS function is switched off in the control
module during the OBD. This is indicated by th
e
flashing of ABS warning light -K47- and warning
light for brake system -K118-. If there is a
malfunction currently, it will be indicated by the
lights being on constantly.

The DTC memory can be erased after
successful check and repair.
- With ignition switched off, connect V.A.G 1551
to diagnostic connection using cable V.A.G
1551/3 A.
- Connect VAS 5051 Page 01
-31 .
V.A.G - On Board Diagnostic HELP
1 - Ra
pid data transfer1)
2 - Blink code output1)
Indicated on display:
1) Is displayed alternately
If the display remains blank, check Data Link
Connector connection, Electrical check, Page
01-288 , test steps 21 and 22.
Note:
Depending on the program, additional operating
information can be printed out by pressing the
HELP key of V.A.G 1551.
The key is used for moving forward within
the program
The PRINT key is used for switching on the
printer (warning lamp in key comes on).
Стр. 6из 129 On Board Diagnostic (OBD), performing

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- Switch on ignition.

- Switch on printer with the Print key (indicator
lamp in key lights up).

- Press key -1- for "Rapid data transfer" operating
mode.
Rapid data transfer HELP
Enter address word XX Indicated on display:
- Press keys -0- and -3-; 03 to input address word
of vehicle system to be tested:"Brake
electronics".
Rapid data transfer Q
03 - Brake electronics Indicated on display:
- Confirm input with Q key.
1C0 907 379 E ESP FRONT MK60 0103
Coding 0011266 WSC XXXXX
And then the display shows e.g.:
Displayed is:
e.g. (1C0 907 379 E).
Allocation of control module see Parts catalog
The control module identification number.
Стр. 7из 129 On Board Diagnostic (OBD), performing

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System designation (ESP).

Type of drive (front wheel).

ABS (Mark 60).

Control module coding (0011266).
Coding control module Page 01
-232 .
Workshop code
V.A.G 1551 scan tool operating
instructions
If the control module identification number
does not appear; Summary of functions
Page 01
-168 .

-
Press key.
Rapid data transfer HELP
Select function XX Indicated on display (select function, e.g. 02
- Interrogate fault memory).
Rapid data transfer HELP
Control module does not answer! Indicated on display:
- By pressing the HELP key, a list of
possible fault causes is printed out.
- After eliminating the possible causes of
malfunctions, enter the address word 03
for "Brake electronics" again and
confirm.
Стр. 8из 129 On Board Diagnostic (OBD), performing

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If "control module does not answer!" again
appears:
Rapid data transfer HELP
control module does not answer! Indicated on display:
- Perform test steps 1, 2 and 3 Page
01-288 , Electrical check.
Rapid data transfer
No signal from control module!
Control module identification influenced
during checking (possibly influenced from
external sources?)
- Check diagnostic wire as well as voltage
supply and Ground connection for ABS
Control Module (w/EDL) -J104-,
Electrical check, Page 01
-288 .
- After repairing the possible causes of the
malfunction, again enter the address
word 03 for "Brake electronics" and
confirm with Q key.
Стр. 9из 129 On Board Diagnostic (OBD), performing

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List of selectable functions

Page
00
- Automatic test sequence Page
01-169
01
- Check control module version
Connecting V.A.G 1551 scan
tool and selecting function Page
01-163
01
- Check control module version
Connecting tester VAS 5051 and
selecting function Page
01-31
02
- Check Diagnostic Trouble Code
(DTC) memory Page
01-170
03
- Output Diagnostic Test Mode
(DTM) Page
01-74
04
- Initiate basic setting Page
01-264
05
- Erase DTC memory Page
01-230
06
- End output Page
01-230
07
- Code control module Page
01-232
08
- Read measured value block Page
01-240
11
- Login procedure Page
01-287
Стр. 10из 129 On Board Diagnostic (OBD), performing

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Automatic test sequence

The automatic test sequence checks all the
Diagnostic Trouble Codes (DTC) memories of
the control modules.

- Switch on ignition.
V.A.G - On Board Diagnosic HELP
1 - Rapid data transfer1
)
2 - Blink code output1)
Indicated on display:
1) Is displayed alternately
- Press key -1- for "Rapid data transfer" operating
mode.
- Switch on printer with the Print key (indicator
lamp in key lights up).
Rapid data transfer HELP
Select function XX Indicated on display:
- Press key -0- twice; 00 to enter "Check
automatic test sequence" function.
- Confirm entry with Q key.
032906026BI 1.6l R4 MONO 1.3 D1 TEV
Codin
g 00002 WSC XXXXX
The V.A.G 1551 scan tool will show the engine
control module identification is displayed first e.g.
Thereafter all control module identifications with
eventual DTC memory entries are displayed.
Стр. 11из 129 On Board Diagnostic (OBD), performing

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Diagnostic Trouble Code (DTC)
memory, checking


Note:
All functions which could previously be
performed with V.A.G 1551 can now also
be carried out with the tester VAS 5051.
Rapid data transfer HELP
Select function XX Indicated on display:
- Press keys -0- and -2-; 02 enters the
"Check DTC memory" function.
Rapid data transfer Q
02 - Check DTC memor
y
Indicated on display:
- Confirm entry with Q key.
X DTCs recognized! The number of stored DTCs or "No DTC
recognized" appears in the display.
-
Press key.
The stored DTCs are displayed and
printed out one after the other.
- With DTC information print-out, eliminate
malfunction according to DTC table,
Page 01
-189 .
As with "No DTC recognized", the
program returns to the start position after
pressing the key:
Стр. 12из 129 On Board Diagnostic (OBD), performing

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Rapid data transfer HELP
Select function XX Indicated on display:
Work sequence if a DTC has been
recognized:
1. Repair malfunction according to DTC
table, Page 01
-189
2. Check DTC memory (Function 02)
3. Erase DTC memory (Function 05)
4. End output (Function 06)
5. Perform a test drive
6. Check DTC memory again - End output (Function 06) Page 01
-
230 .
- Switch off ignition and unplug diagnostic
connector.
Стр. 13из 129 On Board Diagnostic (OBD), performing

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Output Diagnosic Test Mode (DTM)

Note:

All functions which could previously be
performed with V.A.G 1551 can now also be
carried out with the tester VAS 5051.

The pump motor and the correct functioning of
the hydraulic circuits (allocation of brake lines to
wheel cylinders and function of valves) can be
checked via the output DTM for interchange or
leaks.

The vehicle must be raised until all wheels are
free to turn. (2nd mechanic required to rotate
wheels)

The -C- key can be used to exit the test
sequence at any time.

After depressing the brake pedal several times
the vacuum in the brake booster will be
exhausted. Therefore more pressure must be
applied to the brake pedal in order to attain the
same fluid pressure in brake system, as that
attained with vacuum.

When vacuum in brake booster is exhausted it
can happen that the wheels do not lock; start
engine and build-up vacuum in brake booster.
Стр. 14из 129 On Board Diagnostic (OBD), performing