engine VOLKSWAGEN JETTA 1998 Service Manual

Downloaded from www.Manualslib.com manuals search engine 01-253




Checking sensor for transverse acceleration -
G200-
1)

- Remove sensor for transverse acceleration -
G200-. When doing this, do not pull connector
off sensor for transverse acceleration -G200-.
Repair Manual, Brake System, Repair Group
45; Removing and installing parts of ESP system

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 sensor for transverse acceleration -G200-
can be checked with the help of function "Read
measured value block", display group 005.
Read measured value block
4
1 2 3
- There are always 3 display zones -arrows-.
Display zone 2 displays the value for the sensor
for transverse acceleration -G200-.
Read measured value block
4
0.0 0.0m/s2- 1.26/s
Indicated on display: e.g. (vehicle stationary)
1) For ABS/EDL/ASR/ESP and ABS/EDL/ASR/ESP
4MOTION only
Стр. 95из 129 On Board Diagnostic (OBD), performing

Downloaded from www.Manualslib.com manuals search engine 01-254



A negative result equates to the forces
during a right turn. -
Turn 90 to right of installation position
(see illustration).
- Display in display zone 2 (with vehicle
stationary) e.g. -9.8 1 m/s
2.

A positive result equates to the forces
during a left turn. -
Turn 90 to left of installation position
(see illustration).
- Display in display zone 2 (with vehicle
stationary) e.g. 9.8 1 m/s
2.
Стр. 96из 129 On Board Diagnostic (OBD), performing

Downloaded from www.Manualslib.com manuals search engine 01-255



Checking brake pressure sensor 1)

Display group number 005

- Press keys 0, 0 and 5

- Confirm entry with key Q.
Read measured value block
5
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
5
- 1.06 bar
Indicated on display: e.g. (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 ABS/EDL/ASR/ESP and
ABS/EDL/ASR/ESP 4MOTION only
Стр. 97из 129 On Board Diagnostic (OBD), performing

Downloaded from www.Manualslib.com manuals search engine 01-256


Read measured value block
5 Display group number: 005
-1.06 bar
Indicated on display (example)

Vacant

Vacant

Vacant

Brake pressure sensor
Specification when brake pedal is not depressed: 7 bar
Perform electrical check from Page 01-288
Стр. 98из 129 On Board Diagnostic (OBD), performing

Downloaded from www.Manualslib.com manuals search engine 01-257



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

Downloaded from www.Manualslib.com manuals search engine 01-258


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

Downloaded from www.Manualslib.com manuals search engine 01-259



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

Downloaded from www.Manualslib.com manuals search engine 01-260



A positive sign corresponds to the force
when driving forward. -
Turn 90 to right of installation position
(see illustration).
- Display in display zone 1 (with vehicle
stationary) e.g. +9.8 1 m/s
2.

A negative sign corresponds to the force
when driving backward. -
Turn 90 to left of installation position
(see illustration).
- Display in display zone 1 (with vehicle
stationary) e.g. -9.8 1 m/s
2.
Стр. 102из 129 On Board Diagnostic (OBD), performing

Downloaded from www.Manualslib.com manuals search engine 01-261



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

Downloaded from www.Manualslib.com manuals search engine 01-262


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