1998 VOLKSWAGEN JETTA ignition

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- Connect V.A.G 1551 scan tool and select
(address word 03) brake electronics control
module with ignition switched on; Page 01
-
163 .
Rapid data transfer HELP
Select function XX Indicated on display:
- Press keys 0 and 8. (The function "Read
measured value block" is initiated with 08.)
Rapid data transfer Q
08 - Read measured value block Indicated on display:
- Confirm entry with key Q.
Read measured value block
Enter displa
y group number XXX
Indicated on display:
- Enter display group number. List of selectable
display group numbers Page 01
-242 .
Стр. 83из 129 On Board Diagnostic (OBD), performing

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Display group number 01: Bleeding
hydraulic unit

Special tools and equipment

Note:
All functions which could previously be
performed with V.A.G 1551 can now also
be carried out with the tester VAS 5051.
Repair Manual, Brake System, Repair
Group 47; Bleeding brake system, vehicles
with and without ABS
VAS 5234 Brake filler and bleeder unit
- Connect brake filling and bleeder unit
VAS 5234.
- Pre-bleed brake system
- Connect V.A.G 1551 scan tool and select
(address word 03) brake electronics
control module with ignition switched on;
Page 01
-163 .
Rapid data transfer HELP
Select function XX Indicated on display
- Press keys 0 and 4. (The function
"Initiating basic setting" is selected with
04).
Стр. 108из 129 On Board Diagnostic (OBD), performing

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Basic setting 2
De
pr. pedal 10X; bleed screw CLOSED
Indicated on display:
- Press key 3 on V.A.G 1551 or arrow up
key on VAS 5051
System in basic setting 17
Part. bleedin
g ended...
When all 8 cycles have been performed,
this message appears on the display:
-
Press key.
Rapid data transfer HELP
Select function XX Indicated on display:
- Press keys -0- and -6-, this ends the
output.
Rapid data transfer Q
06 - End output Indicated on display
- Confirm entry with Q key
Rapid data transfer Help
Enter address word XX
Indicated on display
Repair Manual, Brake System, Repair
Group 47; Bleeding brake system, vehicles
with and without ABS - Press C key
- Switch off ignition.
- Disconnect connection to V.A.G 1551
scan tool.
- Bleed brake system again
For vehicles with ABS/EDL/ASR/ESP:
perform zero compensation for Sender
1 for brake booster -G201- Page 01
-
278 .
Стр. 110из 129 On Board Diagnostic (OBD), performing

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Display group number 40: switching off
longitudinal acceleration sensor -G251-

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

Display group 040 is necessary for shutting off
longitudinal acceleration sensor -G251- in order
to utilize the maximum engine performance for
a test, e.g. on a rolling road test bed. In
addition, the all wheel drive is shut off and the
vehicle behaves like a front wheel drive vehicle.

Switch ignition off and on again to reactivate the
longitudinal acceleration sensor -G251-.

- Connect V.A.G 1551 scan tool and select
(address word 03) brake electronics control
module with ignition switched on; Page 01
-
163 .
Стр. 111из 129 On Board Diagnostic (OBD), performing

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Rapid data transfer HELP
Enter address word XX Indicated on display:
- Press keys 0 and 4. (The function
"Initiating basic setting" is selected with
04).
Rapid data transfer Q
04 - Basic settin
g
Indicated on display:
- Confirm entry with key Q.
Basic setting HELP
Enter displa
y group number XXX
Indicated on display:
- Press keys 0, 4 and 0
- Confirm entry with key Q.
ABS warning light flashes.
Basic setting 40 Indicated on display:
- The longitudinal acceleration sensor -
G251- is now switched off.
- After completing the checks, reactivate
the longitudinal acceleration sensor -
G251- by switching the ignition off and
on again, once.
Стр. 112из 129 On Board Diagnostic (OBD), performing

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Display group number 60: zero compensation
of steering angle sensor -G85-

Note:

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

- Connect V.A.G 1551 scan tool and select
(address word 03) brake electronics control
module with ignition switched on; Page 01
-
163 .

- Start engine.

- Carry out a short test drive over a flat and level
surface. Drive straight-ahead and not faster then
20 km/h (12.5 mph) and observe the following
points:

If the steering wheel is not in the centered
position when driving straight ahead, the
steering must be corrected within the
framework of an alignment check.
Repair Manual, Suspension, Wheels,
Steering, Repair Group 44; Vehicle alignment.
Стр. 113из 129 On Board Diagnostic (OBD), performing

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If the steering wheel is in the straight ahead
position during the test drive, stop the vehicle
while still driving straight ahead.

- Check specifications with help of function 08
"Read measured value block" Page 01
-240 ,
Display group number 004.

Make sure steering wheel does not moved.
Do not turn ignition switch off!

First perform function 11 "Login procedure"
successfully using V.A.G 1551 scan tool
Page 01
-287
Rapid data transfer HELP
Enter address word XX Indicated on display:
- Press keys 0 and 4. (The function "Initiating
basic setting" is selected with 04).
Rapid data transfer Q
04 - Basic settin
g
Indicated on display:
- Confirm entry with key Q.
Стр. 114из 129 On Board Diagnostic (OBD), performing

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- or:
Basic setting 60 OFF <4-ON>
Compens. not poss.
12. If this appears in the display, the measured
values for the zero compensation are not
within the allowed tolerance.
1. Check DTC memory (Function 02)
2. Erase DTC memory (Function 05)
3. End output (Function 06)
4. Switch off ignition.
5. Switch on ignition.
6. Perform zero compensation again. - Check specifications with help of function
08 "Read measured value block"
Page 01
-240 , Display group number
004.
-
Press key.
Rapid data transfer HELP
Enter address word XX Indicated on display:
- Press keys 0 and 6, this ends the output.
Rapid data transfer Q
06 - End output Indicated on display
ABS and ESP warning lights light up for
approx. 2 seconds.
Стр. 116из 129 On Board Diagnostic (OBD), performing