1998 VOLKSWAGEN JETTA change wheel

Downloaded from www.Manualslib.com manuals search engine 01-119


Switch to measuring range:
Voltage measurement (2 V )
Test
step V.A.G
1598
sockets Item
tested Test
conditions
- Additional
operations Specification
Measures for deviations
from specification
11 22 + 23 Right rear
ABS wheel
speed
sensor -
G44-
voltage
signal
Vehicle
raised
- Check installation of
right rear ABS wheel
speed sensor -G44- and
rotor.


Ignition
switched off

- Rotate rear
right wheel at
approx. 1
rev./sec. min. 190 mV
alternating
voltage - Check whether right
rear ABS wheel speed
sensor -G44- has been
interchanged and Read
measured value block
Page 01
-61 , display
group number 001
12 6 + 5 Left rear
ABS wheel
speed
sensor -
G46-
voltage
signal Vehicle
raised
- Check installation of left
rear ABS wheel speed
sensor -G46- and rotor.


Ignition
switched off

- Rotate rear
left wheel at
approx. 1
rev./sec. min. 190 mV
alternating
voltage - Check whether left rear
ABS wheel speed sensor
-G46- has been
interchanged and Read
measured value block
Page 01
-61 , display
group number 001
Стр. 18из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

Downloaded from www.Manualslib.com manuals search engine 01-172


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

Downloaded from www.Manualslib.com manuals search engine 01-176



-
Press key.
Output Diagnosic Test Mode
-
IFL: VBAT OFL: 0V Wheel FL locked
Indicated on display
ABS hydraulic pump -V64- must run.
Brake pedal must not give.
If the brake pedal gives, there is a
malfunction in the hydraulic unit. In this
case the hydraulic unit must be replaced.
Repair Manual, Brake System, Repair
Group 45 -
Press key.
Output Diagnosic Test Mode
-
IFL: VBAT OFL: VBAT Wheel FL free
Indicated on display
Note:
If the wheel locks there is a possibility that
the brake lines to the wheel
calipers/cylinders have been interchanged. - Indicate to 2nd mechanic which wheel
requires turning by hand.
Стр. 18из 129 On Board Diagnostic (OBD), performing

Downloaded from www.Manualslib.com manuals search engine 01-179



-
Press key.
Output Diagnosic Test Mode
-
IFR: VBAT OFR: 0V Wheel FR locked
Indicated on display
ABS hydraulic pump -V64- must run.
Brake pedal must not give
If the brake pedal gives, there is a
malfunction in the hydraulic unit. In this
case the hydraulic unit must be replaced.
Repair Manual, Brake System, Repair
Group 45 -
Press key.
Output Diagnosic Test Mode
-
IFR: VBAT OFR: VBAT Wheel FR free
Indicated on display
Note:
If the wheel locks there is a possibility that
the brake lines to the wheel
calipers/cylinders have been interchanged. - Indicate to 2nd mechanic which wheel
requires turning by hand.
Стр. 21из 129 On Board Diagnostic (OBD), performing

Downloaded from www.Manualslib.com manuals search engine 01-182



-
Press key.
Output Diagnosic Test Mode
-
IRL: VBAT ORL: 0V Wheel RL locked
Indicated on display
ABS hydraulic pump -V64- must run.
Brake pedal must not give
If the brake pedal gives, there is a
malfunction in the hydraulic unit. In this
case the hydraulic unit must be replaced.
Repair Manual, Brake System, Repair
Group 45 -
Press key.
Output Diagnosic Test Mode
-
IRL: VBAT ORL: VBAT Wheel RL free
Indicated on display
Note:
If the wheel locks there is a possibility that
the brake lines to the wheel
calipers/cylinders have been interchanged. - Indicate to 2nd mechanic which wheel
requires turning by hand.
Стр. 24из 129 On Board Diagnostic (OBD), performing

Downloaded from www.Manualslib.com manuals search engine 01-185



-
Press key.
Output Diagnosic Test Mode
-
IRR: VBAT ORR: 0V Wheel RR locked
Indicated on display
ABS hydraulic pump -V64- must run.
Brake pedal must not give
If the brake pedal gives, there is a
malfunction in the hydraulic unit. In this
case the hydraulic unit must be replaced.
Repair Manual, Brake System, Repair
Group 45 -
Press key.
Output Diagnosic Test Mode
-
IRR: VBAT ORR: VBAT Wheel RR free
Indicated on display
Note:
If the wheel locks there is a possibility that
the brake lines to the wheel
calipers/cylinders have been interchanged. - Indicate to 2nd mechanic which wheel
requires turning by hand.
Стр. 27из 129 On Board Diagnostic (OBD), performing

Downloaded from www.Manualslib.com manuals search engine 01-248


Note:
For display group number 002 remember:
The reading of measured value blocks in display group number 002 must be undertaken when
driving off slowly. Then the ABS Control Module (w/EDL) -J104- will store the first usable
voltage signals provided by the speed sensors and display these as a fixed value in the
measured value block.
Read measured value block
2 Display group number: 002
3 km/h
1)
6 km/h1)
2 km/h2)
1 km/h2)
Indicated on display: (when driving off slowly)

Wheel speed at right rear speed sensor
(0...255 km/h)

Wheel speed at left rear speed sensor

(0...255 km/h)

Wheel speed at right front speed sensor
(0...255 km/h)

Wheel speed at left front speed sensor

(0...255 km/h)
1) If the deviations in display zones 1 and 2 are greater than 6 km/h (approx. 3.75 mph), the
following faults may be present:
2) If the deviations in display zones 3 and 4 are greater than 2 km/h (approx. 1.25 mph), the
following faults may be present:
Note:

Air gap between speed sensor and rotor may be too big.
- Check that speed sensor is screwed correctly to wheel bearing housing.

Speed sensor or rotor exterior damaged.
- Change damaged component.
Стр. 90из 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