Volkswagen New Beetle. Manual - part 706

 

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Volkswagen New Beetle. Manual - part 706

 

 

Fig. 144: Identifying Data Link Connector Terminals For Voltage Supply 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Data Link Connector (DLC) for voltage supply and On Board Diagnostic (OBD) with the VAG1551 Scan Tool (ST) 
terminal assignment 

Terminal 4 = Ground (terminal 31) 

Terminal 16 = Positive (terminal 30) via -S12- 

Terminal 7 = K-wire via connection in instrument panel wiring harness to ABS control module (w/EDL) -J104- 
terminal 7 

T25 harness connector and ABS control module (w/EDL) -J104- terminal assignment 

Fig. 145: Identifying T25 Harness Connector And ABS Control Module (W/EDL) -J104- Terminal 
Assignment
 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

CAN-bus control diagram 

 

2003 Volkswagen New Beetle GLS 

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

  

1. Automatic Transmission Control Module (TCM)  

2. Bus driver 3-ECM  

3. Bus-driver  

4. Terminating impedance  

5. CAN-bus  

6. Terminating impedance  

7. Bus driver  

8. ABS control module (w/EDL) -J104-  

Fig. 146: CAN-Bus Control Diagram 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

MULTIPIN HARNESS CONNECTORS TERMINALS CONNECTION - T25 HARNESS 
CONNECTOR AND ABS CONTROL MODULE (W/EDL)
 

NOTE:

The following list refers to items in Fig. 146 .

Terminal Connected to...
1

Left-front ABS wheel speed sensor -G47-

2

Left-front ABS wheel speed sensor -G47-

3

Coding bridge to terminal 14

4

Voltage supply terminal X

5

Left-rear ABS wheel speed sensor -G46-

6

Left-rear ABS wheel speed sensor -G46-

7

T16/7 harness connector, K wire

8

Ground (GND) point at left side of engine compartment and Ground (GND) connection in 

engine compartment wiring harness

9

B+ via -S179-

10

CAN-bus wire

1)

 wiring diagrams

11

CAN-bus wire

1)

 wiring diagrams

 

2003 Volkswagen New Beetle GLS 

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

  

Test step overview 

TEST STEP OVERVIEW 

ELECTRICAL TEST TABLE 

12

not used

14

Coding bridge to terminal 3

15

not used

16

ABS warning lamp activation

18

Brake light switch -F-

19

Right-front ABS wheel speed sensor -G45-

20

Right-front ABS wheel speed sensor -G45-

21

not used

22

Right-rear ABS wheel speed sensor -G44-

23

Right-rear ABS wheel speed sensor -G44-

24

Ground (GND) point at left side of engine compartment and Ground (GND) connection in 

engine compartment wiring harness

25

B+ via -S178-

Voltage supply for pump motor (terminal 30) on ABS control module -J104-

Test step 1

Voltage supply for valves (terminal 30) on ABS control module -J104-

Test step 2

Voltage supply (terminal X) on control module

Test step 3

Function of brake light switch -F-

Test step 4

Right-front ABS wheel speed sensor -G45- resistance

Test step 5

Left-front ABS wheel speed sensor -G47- resistance

Test step 6

Right-rear ABS wheel speed sensor -G44- resistance

Test step 7

Left-rear ABS wheel speed sensor -G46- resistance

Test step 8

Right-front ABS wheel speed sensor -G45- voltage signal

Test step 9

Left-front ABS wheel speed sensor -G47- voltage signal

Test step 10

Right-rear ABS wheel speed sensor -G44- voltage signal

Test step 11

Left-rear ABS wheel speed sensor -G46- voltage signal

Test step 12

Coding bridge

Test step 13

Voltage supply for VAG 1551, T16 harness connector

Test step 14

Resistance of K wire for On Board Diagnostic (OBD), harness connector T16

Test step 15

Warning lamp function for ABS -K47-

Test step 16

Hydraulic pump -V64- function

Test step 17

CAN-bus wire (resistance)

Test step 18

CAN-bus wire (short circuit to B+)

Test step 19

Longitudinal acceleration sensor -G251- wiring

Test step 20

Function of warning light for brake system -K118-

Test step 21

Function of ASR control lamp -K155-

Test step 22

 

2003 Volkswagen New Beetle GLS 

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

  

VOLTAGE TEST - SWITCH TO 20V DC MEASURING RANGE 

NOTE:

z

The socket designations of adapter VAG1598/21 are identical to ABS 
control module (w/EDL) -J104- terminal designations in the wiring diagram. 

z

If the readings obtained deviate from the specifications, carry out 
"corrective action" measures in the right side of the table.  

z

Use only the VW1594A connector test kit to check continuity (bridging).  

z

If the measured figures only differ slightly from the specifications, clean 
the sockets and harness connectors of the testers and adapter leads 
(using contact spray G 000 700 04 ) and repeat the check. Before replacing 
components, check the wiring and connections again, particularly if the 
specification calls for a resistance reading of less than 10 ohms.  

Voltage test - switch to 20V DC measuring range

Test 
step

VAG1598 

sockets

Test of

z

Test 

conditions  

z

Additional 

operations  

Specified

value

Corrective action

1

8 + 25

Voltage supply for 

pump motor (terminal 

30) on ABS control 

module (w/EDL) -J104-

z

Ignition off   10.0-14.5 

V

z

Check wire from 

terminal 25 to Ground 

(GND) 

z

Check wire from 

terminal 8 via fuse -

S178- to B+. 

2

9 + 24

Voltage supply for 

pump motor (terminal 

30) on ABS control 

module (w/EDL) -J104-

z

Ignition off   10.0-14.5 

V

z

Check wire from 

terminal 9 to Ground 

(GND). 

z

Check wire from 

terminal 24 via fuse -

S179- to B+. 

3

8 + 4

Voltage supply (terminal 

X) on control module

z

Ignition on   10.0-14.5 

V

z

Check wire from 

terminal 4 via fuse -

S9- and ignition 

switch to Ground 

(GND). 

z

Check wire from 

terminal 8 to B+. 

4

8 + 18

Function of brake light 

switch -F-

z

Ignition off  

z

Brake pedal 

not depressed 

0.0-0.5 V

z

Check fuse -S13- and 

brake light switch -F-. 

z

Check wire from 

terminal 18 to Ground 

(GND). 

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

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