1998 VOLKSWAGEN JETTA lock

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Checking longitudinal acceleration
sensor -G251-
1)

Display group number 006

- Press keys 0, 0 and 6

- Confirm entry with key Q.
Read measured value block
6
1 2 3 4
- There are always 4 display zones -
arrows- in the measured value block.
Decoding the individual values in display
zones 1 to 4 can be read-off from the
following tables.
Read measured value block
6
0.0m/s2
Indicated on display: (vehicle stationary)
Press C key for the next display group
number entry.
If the key is pressed, keys 0 and 8 for
work sequence "Read measured value
block" must be pressed again afterwards to
regain entry.
1) For 4MOTION vehicles only
Стр. 99из 129 On Board Diagnostic (OBD), performing

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Read measured value block
6 Display group number: 006
0.0m/s
2

Indicated on display (example)

Vacant

Vacant

Vacant

Longitudinal acceleration sensor:
1)

Specification when vehicle is stationary:+/- 1.5m/s2

Specification when accelerating forwards: The values increase steadily.

Specification when accelerating in reverse: The values increase steadily
with a negative sign (-).

Check longitudinal acceleration sensor -G251- Page 01-259
Perform electrical check Page 01-288
1) When performing a test drive where the V.A.G 1551 scan tool or tester VAS 5051 is
connected and in diagnosis or read measured value block mode there is no ABS regulation.
The ABS warning light does not light up. The OBD of ABS control module (w/EDL) -J104- is
terminated when exceeding a speed of 20 km/h (13 mph).
Стр. 100из 129 On Board Diagnostic (OBD), performing

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Checking longitudinal acceleration sensor -
G251-
1)

- Remove longitudinal acceleration sensor -G251-
without pulling off connector.
Repair Manual, Brake System, Repair Group
45

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.

- Connect V.A.G. 1551 scan tool.
The longitudinal acceleration sensor -G251- can
be checked with the help of function "Read
measured value block", display group 006.
Read measured value block
6
1 2 3 4
- There are always 4 display zones -arrows- in the
measured value block. Decoding the individual
values in display zones 1 to 4 can be read-off
from the following tables.
Read measured value block
6
0.0m/s2
Indicated on display: e.g. (vehicle stationary)
1) For 4MOTION vehicles only
Стр. 101из 129 On Board Diagnostic (OBD), performing

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Checking data bus wiring

Display group number 125

- Press keys 1, 2 and 5

- Confirm entry with key Q.
Read measured value block
125
1 2 3 4
- There are always 4 display zones -
arrows- in the measured value block.
Decoding the individual values in display
zones 1 to 4 can be read-off from the
following tables.
Read measured value block 125
Engine 1 St.ang. 1 4WD 1 Gear.1
Indicated on display: (vehicle stationary)
Press C key for the next display group
number entry.
If the key is pressed, keys 0 and 8 for
work sequence "Read measured value
block" must be pressed again afterwards to
regain entry.
Стр. 103из 129 On Board Diagnostic (OBD), performing

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Read measured value block
125 Display group number: 125
Engine
1 St.ang.
1 4WD
1 Gear.
1 Indicated on display (example)

Data Bus for transmission1)
1 Data bus connection is available.
0 Data bus connection is not available.3)

Data bus for all-wheel drive2)

1 Data bus connection is available.
0 Data bus connection is not available.3)

Data bus for steering angle

1 Data bus connection is available.
0 Data bus connection is not available.3)

Data bus for engine

1 Data bus connection is available.
0 Data bus connection is not available.3)
1) Vehicles with automatic transmission only.

Incorrect transmission control module or incorrect transmission control module coding.

Transmission control module malfunction.
Repair Manual, Transmission, Repair Group 01 for relevant transmission code.
2) For 4MOTION vehicles only
3) Data bus connection is interrupted or data bus wires are interchanged.
Electrical Wiring Diagrams, Troubleshooting & Component Locations binder.
Стр. 104из 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

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Display group number 63: zero compensation
of Sensor for transverse acceleration -G200-

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

Position vehicle on a flat level surface.

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

- Check specifications with help of function 08
"Read measured value block" Page 01
-240 ,
Display group number 004.
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).
Стр. 117из 129 On Board Diagnostic (OBD), performing