Volkswagen New Beetle. Manual - part 1606

 

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Volkswagen New Beetle. Manual - part 1606

 

 

Fig. 38: Identifying Scan Tool Display - Checking Throttle Valve Control Module (3 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Check throttle valve angle at idling stop from Throttle valve angle sensor 1 -G187- in display zone 1: 

Specification: 10 to 88% 

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Check throttle valve at idling stop from Throttle valve angle sensor 2 -G188- in display zone 2:  

Specification: 89 to 11% 

DISPLAY GROUP 62: SPEED CONTROL, ELECTRONIC POWER CONTROL (EPC) 

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Depress accelerator slowly until full throttle position and observe angles displayed in display zones 1 and 
2:  

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Percent figure in display zone 1 must rise continuously and evenly. Full tolerance range 10 to 88% is not 
always displayed.  

 

Display zones

1

2

3

4

Display group 62: Speed control, Electronic Power Control (EPC)
Display

xxx %

xxx %

xxx %

xxx %

Indicated

Throttle valve angle 

sensor 1 -G187-

Throttle valve angle 

sensor 2 -G188-

Throttle Position 

(TP) sensor 1 -

G79-

Throttle Position 

(TP) sensor 2 -

G185-

Working 
range

0 to 100%

0 to 100%

0 to 100%

0 to 100%

Specification

10 to 88%

89 to 11%

10 to 18%

5 to 9%

 

If specifications are not achieved, see CHECKING 

VOLTAGE SUPPLY AND WIRING TO 

CONTROL MODULE , Continuation

-

-

 

2003 Volkswagen New Beetle GLS 

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

  

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Percent figure in display zone 2 must fall continuously and evenly. Full tolerance range 89 to 11% is not 
always displayed.  

If the specifications are obtained: 

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Press --> button.  

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

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Switch off ignition.  

Continuation 

If the displays do not indicate as described: 

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Press --> button.  

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

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Switch off ignition.  

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Disconnect 6-pin connector from Throttle Valve Control Module - J338- -arrow-. 

NOTE:

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The reason why the display in display zone 1 rises and the display in 
display zone 2 falls is because the potentiometers (angle sensors) in the 
angle sensors run in opposite directions.  

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The voltage of angle sensor 1 moves toward 5 volts. (The more the throttle 
valve is opened the higher the voltage; percentage increases).  

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While the voltage of angle sensor 2 drops from 5 volts toward 0 volt. (The 
more the throttle valve is opened the lower the voltage; percentage falls).  

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 39: Disconnecting Pin Connector From Throttle Valve Control Module 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Measure resistance from throttle valve drive between terminals 3 and 5 

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 40: Measuring Resistance From Throttle Valve Drive Between Terminals 3 And 5 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Specification: 1.0 to 5.0 

If the specification is not obtained: 

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Replace Throttle Valve Control Module -J338-, see item 22 .  

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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
 .  

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Adapt Motronic Engine Control Module (ECM) -J220- to Throttle Valve Control Module -J338-, see 
MOTRONIC ENGINE CONTROL MODULE (ECM) - J220- TO THROTTLE VALVE 
CONTROL MODULE - J338-, ADAPTING
 .  

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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 

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

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