1998 VOLKSWAGEN JETTA Service Manual

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Checking brake light switch, brake
system warning lamp, ABS warning
lamp and ASR/ESP warning lamp

Display group number 003

- Press keys 0, 0 and 3

- Confirm entry with key Q.
Read measured value block
3
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
3
not oper. off off off
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 afterward to
regain entry.
Стр. 91из 129 On Board Diagnostic (OBD), performing

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Read measured value block
3 Display group number: 003
not
oper. off off off
Indicated on display

ASR/ESP warning light
off
on

ABS warning light
1)
off
on

Brake system warning light
1)

off

on

Brake light switch:
If "not oper." is indicated on the V.A.G 1551 display despite foot brake being
depressed or "operated", despite foot brake not being depressed, perform test step
No. 4 of electrical check, Page 01
-288 .
It is also possible that the brake light switch is not correctly adjusted.
Repair Manual, Brake System, Repair Group 46; Brake pedal
- Assembly
overview; Adjusting brake light switch
not oper. Brake pedal not depressed
operated Brake pedal depressed
1) During the diagnosis, ABS warning light -K47- and Warning light for brake system -K118- will
flash.
Стр. 92из 129 On Board Diagnostic (OBD), performing

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Checking steering angle sensor, sensor
for transverse acceleration and sender
for rotation rate
1)

Display group number 004

- Press keys 0, 0 and 4

- Confirm entry with key Q.
Read measured value block
4
1 2 3
- There are always 3 display zones -
arrows- in the measured value block.
Decoding the individual values in display
zones 1 to 3 can be read-off from the
following tables.
Read measured value block
4
0.0 0.0m/s2- 1.26/s
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. 93из 129 On Board Diagnostic (OBD), performing

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Read measured value block
4 Display group number: 004
0.0
0.0m/s2-
1.26 /s
Indicated on display (example)

Vacant

Sender for rotation rate:
Specification when vehicle is stationary:+/- 2.5 /s
Perform electrical check from Page 01-288

Sensor for transverse acceleration:

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

Specification at full lock at a speed of 20 km/h (13 mph) in a left-hand
curve: the values increase steadily.

Specification at full lock at a speed of 20 km/h (13 mph) in a right-hand
curve: the values increase steadily with a negative (-) sign.

Check lateral acceleration sensor -G200- Page 01-253
Perform electrical check from from Page 01-288

Steering angle sensor:

If the steering angle sensor -G85- is tested during straight-ahead travel, then zero
compensation must also be performed.
1)

Specification at straight ahead 4.5
Perform electrical checks from Page 01-288
- Initiate basic setting Page 01-264 Display group number 060
1) During a test drive with the V.A.G 1551 scan tool or tester VAS 5051 connected and in
"Diagnosis" or "Measured value block", there is no ABS or ESP regulation. The ABS or ESP
warning lights will flash. The OBD of ABS control module (w/EDL) -J104- is terminated when a
speed of 20 km/h (13 mph) is exceeded.
Стр. 94из 129 On Board Diagnostic (OBD), performing

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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

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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

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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

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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