Volkswagen New Beetle. Manual - part 1641

z

Check wiring to speedometer/speedometer sensor.  

z

Check DTC Memory, if necessary, repair any malfunctions and then Erase DTC Memory, see DTC 
MEMORY OF MOTRONIC ENGINE CONTROL MODULE (ECM) -J220-, CHECKING AND 
ERASING .  

z

Read readiness code, see READINESS CODE, DISPLAYING . If DTC memory has been erased or 
Motronic Engine Control Module (ECM) -J220- was disconnected from battery positive, readiness code 
must be generated again, see READINESS CODE, GENERATING .  

Signal from/to air conditioning, checking 

Special tools, test equipment and auxiliary items 

z

VAG 1551 scan tool or VAG 1552 mobile scan tool with VAG 1551/3B cable  

z

VAG 1598/31 test box  

z

VAG 1526 A or Fluke 83 multimeter  

z

VAG 1594 adapter set  

z

Electrical Wiring Diagram  

Test conditions 

z

All fuses must be OK. Fuse block is located behind access panel at far left end of dash. 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Multiport Fuel Injection (MFI) , 1.8L AWP, AWV - New Beetle

  

Fig. 152: Locating Fuses 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Battery voltage must be at least 11.5 V  

z

Air conditioner functioning OK  

z

Air conditioner must be switched off  

z

All electrical accessories, e.g. lights and rear window defroster must be switched off  

z

No DTCs must be stored in DTC memory, see DTC MEMORY OF MOTRONIC ENGINE 
CONTROL MODULE (ECM) -J220-, CHECKING AND ERASING  

z

Vehicle at room temperature (warmer than + 15 °C)  

Test sequence 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Multiport Fuel Injection (MFI) , 1.8L AWP, AWV - New Beetle

  

z

Connect VAG 1551 scan tool ((VAG 1552). Start engine and select "Address word" 01 of Motronic 
Engine Control Module (ECM) -J220-. Engine must be running at idle speed. Connecting scan tool and 
selecting Motronic Engine Control Module (ECM) -J220-, see VAG 1551, CONNECTING AND 
SELECTING MOTRONIC ENGINE CONTROL MODULE (ECM) -J220- . 

Indicated on display 

Fig. 153: Identifying Scan Tool Display - Signal From/To Air Conditioning, Checking (1 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Press buttons -0- and -8- for function "Read measuring value block" and confirm entry with -Q- button. 

Indicated on display 

Fig. 154: Identifying Scan Tool Display - Signal From/To Air Conditioning, Checking (2 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC.

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Multiport Fuel Injection (MFI) , 1.8L AWP, AWV - New Beetle

  

z

Press buttons -0-, -5- and -0- for "Display group number 50" and confirm entry with -Q- button. 

Indicated on display (1 to 4 - Display zones) 

Fig. 155: Identifying Scan Tool Display - Signal From/To Air Conditioning, Checking (3 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Check specifications for air conditioner (display zones 3 and 4)  

DISPLAY GROUP 50: SIGNALS TO MOTRONIC ENGINE CONTROL MODULE (ECM) -J220- 

 

Display zones

1

2

3

4

Display group 50: Signals to Motronic Engine Control Module (ECM) -J220-
Display

xxxx RPM

xxxx RPM

A/C-LOW 

A/C-HIGH

Compr. ON

Compr. OFF

Indicated

Actual 
engine 

speed (in 

steps of 10)

Specified 

engine speed 

(in steps of 10)

Air conditioner status

Air conditioner compressor status

Working 
range

0 to 6800 
RPM

-

-

-

Specification 760 to 810 

RPM 

(1)

 

700 to 750 

RPM 

(2)

760 RPM 

(1)

 

700 RPM 

(2)

A/C -LOW

Compressor on:

Compr. ON

Compressor off:

Compr. OFF

-

-

If specification is not obtained, see SIGNAL 

FROM CLUTCH VACUUM VENT 

VALVE SWITCH -F36-, CHECKING, 

VEHICLES FROM MY 2001 , 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Multiport Fuel Injection (MFI) , 1.8L AWP, AWV - New Beetle