Volkswagen New Beetle. Manual - part 765

Fig. 97: V.A.G 1551 Scan Tool Display - Initiating Output Diagnostic Test Mode - Function 03 (37 
Of 37) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Checking data bus wiring 

Display group number 125 

z

Press keys 1, 2 and 5  

z

Confirm entry with key Q.  

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 from the following tables. 

Fig. 98: V.A.G 1551 Scan Tool Display - Checking Data Bus Wiring (1 Of 2) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Indicated on display: (vehicle stationary) 

Press C key for the next display group number entry.

 

2003 Volkswagen New Beetle GLS 

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

  

If the --> key is pressed, keys 0 and 8 for work sequence "Read measured value block" must be pressed again 
afterwards to regain entry. 

Fig. 99: V.A.G 1551 Scan Tool Display - Checking Data Bus Wiring (2 Of 2) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

MEASURING VALUE BLOCK 125 

BASIC SETTING (FUNCTION 04) 

Read measured value block

125 -->

Display group number: 125

Engine 1

AWD 1

Gear. 1

 

Indicated on display (example)

 

 

 

 

Vacant

 

 

 

Data bus connection for transmission

(1)

 ) 

z

1 --> Data bus connection is available.  

z

0 --> Data bus connection is not available.

(3)

 

 

 

 

Data bus for all-wheel drive

(2)

 

z

1 --> Data bus connection is available.  

z

0 --> Data bus connection is available.  

 

Data bus for engine 

z

1 --> Data bus connection is available.  

z

0 --> Data bus connection is not available.  

(1)

Vehicles with automatic transmission only. Incorrect transmission control module or incorrect 
transmission control module coding. Transmission control module faulty.

(2)

All wheel drive vehicles with Haldex coupling only.

(3)

Data bus connection is interrupted or data bus wires are interchanged.

 

2003 Volkswagen New Beetle GLS 

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

  

Special tools and test equipment 

z

VAS 5234 brake filler and bleeder unit  

On vehicles with EDL the basic setting is used to bleed the hydraulic unit only. The brake system must be 
bleed separately . 

See BLEEDING BRAKE SYSTEM . 

Basic setting is only necessary when at least one brake fluid reservoir chamber is completely empty (e.g. leaks 
in brake system). 

Basic settings must also be carried out after a leaking brake system has been serviced. 

z

Connect VAS 5234 brake filler and bleeder unit.  

z

Connect VAG1551 scan tool and insert "Brake Electronics" address word 03 with ignition switched on 
VAG1551 SCAN TOOL (ST), CONNECTING AND SELECTING FUNCTION . 

Fig. 100: Identifying VAS 5234 Brake Filler And Bleeder Unit 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Indicated on display 

z

Press buttons -0- and -4- to select "Basic Setting" function 04. 

NOTE:

The basic setting to bleed the hydraulic unit is only required when one 
chamber of the brake fluid reservoir is completely empty.

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 101: V.A.G 1551 Scan Tool Display - Initiating Basic Setting - Function 04 (1 Of 39) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Indicated on display 

z

Press -Q- button to confirm input. 

Fig. 102: V.A.G 1551 Scan Tool Display - Initiating Basic Setting - Function 04 (2 Of 39) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Indicated on display 

z

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

z

Press -Q- button to confirm input. 

 

2003 Volkswagen New Beetle GLS 

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