Volkswagen New Beetle. Manual - part 814

CIRCUIT TESTING 

ELECTRIC VACUUM PUMP (MODELS UP TO 05/2002) 

Disconnect electric brake vacuum pump 6-pin harness connector. Vacuum pump is located on subframe in front 
of steering box, left side. See Fig. 8 . Check for poor, loose, corroded or damaged terminal connection. Also, 
check instrument panel fuses No. 31 and 51. If problem is found, repair as necessary. After repair, recheck 
vacuum pump operation. See ELECTRIC VACUUM PUMP under TESTING.  

If no problem with terminals is found, perform circuit testing of vacuum pump. See ELECTRIC VACUUM 
PUMP TESTING (MODELS UP TO 05/2002) table. For aid in identifying terminals and circuits, see Fig. 
10 . For Engine Control Module (ECM) terminal testing and identification, see appropriate article in ENGINE 
PERFORMANCE.  

Fig. 10: Identifying Electric Vacuum Pump Harness Connector Terminals & Pin Voltage Chart (Models 
Up To 05/2002) 
Courtesy of VOLKSWAGEN UNITED STATES, INC. 

ELECTRIC VACUUM PUMP TESTING (MODELS UP TO 05/2002) 

NOTE:

If the measured figures only deviate slightly from the specifications, clean 
sockets and plugs of the testers and adapter cables (with contact spray G 000 
700 04 or equivalent) and repeat check. Before replacing components, check 
wiring and connections and also, particularly for specifications of less than 10 
ohms, repeat resistance check on component. 

Test 

Perform Test Step 

No. 

See 

Fig. 

Brake System Vacuum Pump Resistance 

1 

Fig. 

11

Communication Signal From ECM To Brake System 

2 

Fig. 

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES Disc - New Beetle

  

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Fig. 11: Vacuum Pump Electrical Test Steps No. 1 & 2 (Models Up To 05/2002) 
Courtesy of VOLKSWAGEN UNITED STATES, INC. 

Fig. 12: Vacuum Pump Electrical Test Step No. 3 (Models Up To 05/2002) 
Courtesy of VOLKSWAGEN UNITED STATES, INC.

Vacuum Pump 

11

Ignition/Starter Switch Voltage Supply To Brake System 
Vacuum Pump 

3 

Fig. 

12

Resistance Of Ignition/Starter Switch To Brake System 
Vacuum Pump Circuit 

4 

Fig. 

13

Resistance Of Battery To Brake System Vacuum Pump 
Circuit 

5 

Fig. 

14

Brake System Vacuum Pump Battery Voltage Supply 

6 

Fig. 

15

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES Disc - New Beetle

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 7:59:17 AM

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© 2004 Mitchell Repair Information Company, LLC. 

Fig. 13: Vacuum Pump Electrical Test Step No. 4 (Models Up To 05/2002) 
Courtesy of VOLKSWAGEN UNITED STATES, INC. 

Fig. 14: Vacuum Pump Electrical Test Step No. 5 (Models Up To 05/2002) 
Courtesy of VOLKSWAGEN UNITED STATES, INC. 

Fig. 15: Vacuum Pump Electrical Test Step No. 6 (Models Up To 05/2002) 
Courtesy of VOLKSWAGEN UNITED STATES, INC. 

ELECTRIC VACUUM PUMP (MODELS FROM 06/2002) 

Disconnect electric brake vacuum pump 6-pin harness connector. Vacuum pump is located on subframe in front 
of steering box, left side. See Fig. 8 . Check for poor, loose, corroded or damaged terminal connection. Also, 

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES Disc - New Beetle

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 7:59:17 AM

Page 18 

© 2004 Mitchell Repair Information Company, LLC. 

check instrument panel fuse No. 51. If problem is found, repair as necessary. After repair, recheck vacuum 
pump operation. See ELECTRIC VACUUM PUMP under TESTING.  

If no problem with terminals is found, perform electrical testing of vacuum pump. See ELECTRIC VACUUM 
PUMP TESTING (MODELS FROM 06/2002) table. For aid in identifying terminals and circuits, see Fig. 
16 . For Engine Control Module (ECM) terminal testing and identification, see appropriate article in ENGINE 
PERFORMANCE.  

Fig. 16: Identifying Electric Vacuum Pump Harness Connector Terminals & Pin Voltage (Models From 
06/2002) 
Courtesy of VOLKSWAGEN UNITED STATES, INC. 

ELECTRIC VACUUM PUMP TESTING (MODELS FROM 06/2002) 

Test 

Perform Test Step 

No. 

See 

Fig. 

Brake System Vacuum Pump Resistance 

1 

Fig. 

17

Communication Signal From ECM To Brake System 
Vacuum Pump 

2 

Fig. 

17

Resistance Of Battery Power Supply To Brake System 
Vacuum Pump Circuit 

3 

Fig. 

18

Brake System Vacuum Pump Battery Voltage Supply 

4 

Fig. 

19

 

2003 Volkswagen New Beetle GLS 

1998-2004 BRAKES Disc - New Beetle

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 7:59:17 AM

Page 19 

© 2004 Mitchell Repair Information Company, LLC.