Volkswagen New Beetle. Manual - part 758

SAFETY PRECAUTIONS 

Observe following if test and measuring instruments are required during a test drive: 

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Test and measuring instruments must be secured to rear seat and operated by a 2nd person from this 
location.  

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When test and measuring instruments are operated from the front passenger seat there is a danger that the 
person sitting there could be injured in an accident when the airbag is triggered.  

List of selectable display group numbers 

SELECTABLE DISPLAY GROUP NUMBERS LIST (1 Of 2) 

SELECTABLE DISPLAY GROUP NUMBERS LIST (2 Of 2) 

Test sequence and test tables with measured values

Display group number

Display field

Designation

001

1

Wheel speed at left-front wheel sensor (km/h)

 

2

Wheel speed at right-front wheel sensor (km/h)

 

3

Wheel speed at left-rear wheel speed sensor (km/h)

 

4

Wheel speed at right-rear wheel speed sensor (km/h)

002

1

Wheel speed at left-front wheel speed sensor (km/h)

 

2

Wheel speed at right-front wheel sensor (km/h)

 

3

Wheel speed at left-rear wheel speed sensor (km/h)

 

4

Wheel speed at right-rear wheel speed sensor (km/h)

003

1

Brake light switch

 

2

Vacant

 

3

Vacant

 

4

Vacant

Display group number

Display zone

Designation

006

1

Longitudinal acceleration sensor -G251-

(1)

 

2

Vacant

 

3

Vacant

 

4

Vacant

125

1

Data bus for engine

 

2

Data bus for all wheel drive

(1)

 

3

Data bus for transmission

(2)

 

4

Vacant

(1)

All wheel drive vehicles with Haldex coupling only.

(2)

Vehicles with automatic transmission only.

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES On Board Diagnostic (OBD) - New Beetle

  

Checking wheel speed sensor allocation 

Display group 001 

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Press buttons -0-, -0- and -1 - to input display group number 1 (001).  

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Press -Q- button to confirm input.  

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There are always 4 display fields (arrows) in the display group. Descriptions of the individual values in 
display fields 1 - 4 can be found in the table, see CHECKING WHEEL SPEED SENSOR . 

Fig. 55: V.A.G 1551 Scan Tool Display - Checking Wheel Speed Sensor Allocation (1 Of 2) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Indicated on display (vehicle stationary) 

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Press -C- button for next display group number entry. 

If the --> button is pressed, buttons -0- and -8- ("Read Measuring Value Block") must be pressed again to 
regain entry. 

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES On Board Diagnostic (OBD) - New Beetle

  

Fig. 56: V.A.G 1551 Scan Tool Display - Checking Wheel Speed Sensor Allocation (2 Of 2) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

MEASURING VALUE BLOCK 1 

Checking wheel speed sensor 

Display group 002 

The measured value block for display group 002 must be read when the vehicle is being driven slowly. ABS 
control module (w/EDL) -J104- saves the first usable voltage signal from the wheel speed sensor and displays 
this value in the display group. The values are displayed on the VAG1551 when the vehicle is being driven 
slowly. 

Read Measuring Value Block 1

-->

Display group 001

0 km/h

4 km/h

0 km/h

0 km/h

Indicated on display (Example)

 

 

 

 

Wheel speed at right-rear wheel speed sensor

z

(0 - 255 km/h)

 

 

 

Wheel speed at left-rear wheel speed sensor 

z

(0 - 255 km/h)  

 

 

Wheel speed at right-front wheel speed sensor 

z

(0 - 255 km/h)  

 

Wheel speed at left-front wheel speed sensor 

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(0 - 255 km/h)  

NOTE:

For display group 001 remember: The momentary wheel speeds are displayed, and are used to 
verify correct wheel speed sensor connections. (The vehicle must be raised and the wheel must be 
rotated by hand by a second technician).

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES On Board Diagnostic (OBD) - New Beetle

  

z

Press buttons -0-, -0- and -2- to input display group number 2 (002).  

z

Press -Q- button to confirm input. 

There are always 4 display fields (arrows) in the display group. Descriptions of the individual values in 
display fields 1 - 4 can be found in the table, see CHECKING ABS BRAKE LIGHT SWITCH AND 
ABS/EDL FUNCTION 

Fig. 57: V.A.G 1551 Scan Tool Display - Checking Wheel Speed Sensor (1 Of 2) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Indicated on display (vehicle stationary) 

z

Press -C- button for next display group number entry. 

If the --> button is pressed, buttons -0- and -8- ("Read Measuring Value Block") must be pressed again to 
regain entry. 

Fig. 58: V.A.G 1551 Scan Tool Display - Checking Wheel Speed Sensor (2 Of 2) 
Courtesy of VOLKSWAGEN OF AMERICA, INC.

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES On Board Diagnostic (OBD) - New Beetle