Volkswagen New Beetle. Manual - part 1429

 

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Volkswagen New Beetle. Manual - part 1429

 

 

See Diagnostic Trouble Code (DTC) Memory, Checking And Erasing

z

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

z

If the vehicle is equipped with an air conditioner, this must be switched off  

z

Throttle valve angle less than 4.1%. See display group 03, display zone 3  

z

Coolant temperature less than 95° C. See display group 04, display zone 3  

z

Intake air temperature less than 90° C. See display group 04, display zone 4  

Functional check 

z

Connect VAG 1551 Scan Tool (or VAG 1552 Scan Tool). Start engine and select Engine Control Module 
with "Address word" 01. 

Connecting scan tool and selecting Engine Control Module: 

See V.A.G 1551 Scan Tool, Connecting And Selecting Engine Control Module 

Indicated on display 

Fig. 48: V.A.G 1551 Scan Tool Display - Checking EVAP System For Leak (1 Of 4) 
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 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Fuel System - New Beetle, 1.8L (APH, AWV & AWP)

  

Fig. 49: V.A.G 1551 Scan Tool Display - Checking EVAP System For Leak (2 Of 4) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Press buttons -0-, -7- and -1- for "Display group number 71" and confirm entry with -Q- button. 

Indicated on display 

Fig. 50: V.A.G 1551 Scan Tool Display - Checking EVAP System For Leak (3 Of 4) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Indicated on display 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Fuel System - New Beetle, 1.8L (APH, AWV & AWP)

  

Fig. 51: V.A.G 1551 Scan Tool Display - Checking EVAP System For Leak (4 Of 4) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Check display in display zone 1: 

DISPLAY IN DISPLAY ZONE CHECK 

If "Reed open" appears in display group 1: 

z

Open fuel tank cap briefly to allow pressure in fuel tank to dissipate, this will close reed contact.  

If the specification is obtained: 

z

Press button 4 for "Introduction of basic setting" function.  

Indicated on display 

-

Display zones

1

2

3

4

Display group 71: Evaporative Emission (EVAP) system diagnosis (leak detection)

Display

Reed open 

Reed closed

Small leak/large 

leak 

Abort

Syst. Test 

Check 

Check end

Test OFF/Test ON

Syst. OK

Syst. not OK

Indicated

Reed contact 

condition

Malfunction 

message

System 

condition

Diagnosis condition and

diagnosis result

Working 
range

-

-

-

-

Specified 
value

Reed open

-

Check.END

Syst. OK

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Fuel System - New Beetle, 1.8L (APH, AWV & AWP)

  

Fig. 52: V.A.G 1551 Scan Tool Display - Checking EVAP System For Leak (5 Of 11) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

The test of the Evaporative Emission (EVAP) system will be initiated. First of all the function of the Reed 
contact (in the Leak detection pump -V144-) will be checked by the control module. 

After approx. 10 seconds the Leak Detection Pump (LDP) -V144- will be activated and build-up pressure in the 
fuel system. 

Indicated on display 

Fig. 53: V.A.G 1551 Scan Tool Display - Checking EVAP System For Leak (6 Of 11) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

The test will be initiated after approx. 50 seconds (when there is sufficient pressure available in the fuel system 
can last up to 120 seconds). 

Indicated on display 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Fuel System - New Beetle, 1.8L (APH, AWV & AWP)

  

 

 

 

 

 

 

 

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