Volkswagen New Beetle. Manual - part 1640

z

Battery voltage must be at least 11.5 V  

z

Speedometer must be OK., checking speedometer: 

See INSTRUMENTS 

z

Selector lever must be in position "P" or "N" on vehicles with an automatic transmission  

Test sequence 

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. 148: Identifying Scan Tool Display - Engine Speed Signal (RPM), 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 

NOTE:

To check the speed signal the vehicle must be driven and a second person is 
necessary.

WARNING:

During a road test in an airbag-equipped vehicle, test equipment must 
always be fastened to and operated from the rear seat by a second 
technician.

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 149: Identifying Scan Tool Display - Engine Speed Signal (RPM), Checking (2 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

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

Indicated on display (1 to 4 - Display zones) 

Fig. 150: Identifying Scan Tool Display - Engine Speed Signal (RPM), Checking (3 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Test drive vehicle with a 2nd person to observe display. 

Observe the valid safety precautions when carrying out a road test, see SAFETY PRECAUTIONS . 

z

Observe figure displayed in display zone 3: 

 

2003 Volkswagen New Beetle GLS 

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

  

Specification: approx. driven speed 

DISPLAY GROUP 5: GENERAL ENGINE DATA 

z

Press --> button.  

z

Press buttons -0- and -6- for "End output" function and confirm input with -Q- button.  

z

Switch off ignition. 

Continuation 

If no speed is displayed: 

z

Remove inner plenum chamber cover, left: 

See PLENUM CHAMBER INNER COVER, REMOVING AND INSTALLING 

z

Connect VAG 1598/31 test box to control module wiring harness. Motronic Engine Control Module 
(ECM) -J220- is not connected by this action. 

 

Display zones

1

2

3

4

Display group 5: General engine data
Display

xxxx RPM

xxx %

xxx km/h

Idling part load full

load overrun

enrichment

Indicated

Engine 

speed (in 

steps of 40)

Engine 

load

Vehicle speed

Operating mode

Working 
range

0 to 6800 

RPM

0 to 

175%

0 to 260 km/h

-

Specification

-

-

Approx. vehicle speed

-

-

-

If no driving speed is displayed, see 

SIGNAL FROM/TO AIR 

CONDITIONING, CHECKING , 

Continued

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 151: Connecting VAG 1598/31 Test Box To Control Module Wiring Harness 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Connect multimeter to measure voltage between test box sockets 3 (terminal 15) + 54 (speed signal).  

z

Switch on ignition.  

z

Lift vehicle at front left.  

z

Rotate front wheel and observe voltage display. 

Specification: between 0 and at least 4 Volt fluctuating 

If the display does not fluctuate: 

NOTE:

If necessary, hold the front right wheel to prevent it from turning.

 

2003 Volkswagen New Beetle GLS 

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