Volkswagen New Beetle. Manual - part 1469

 

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Volkswagen New Beetle. Manual - part 1469

 

 

If the specifications are obtained: 

z

Press --> button.  

z

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

z

Switch ignition off.  

If the specifications are not attained: 

z

Press buttons -0- and -8- for "Read Measuring Value Block" function and confirm entry with Q button.  

Indicated on display 

Fig. 56: V.A.G 1551 Scan Tool Display - Checking EVAP System For Leak (9 Of 11) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Press buttons -0-, -7- and -0- for "Display group number 70" and confirm entry with -Q- button.  

Indicated on display: (1-4 = Display zones) 

value

If a malfunction message 

is indicated: 

See CHECKING FOR 

LEAKS checking for 

leaks

If the specifications are not obtained: Check DTC memory, 
See Diagnostic Trouble Code (DTC) Memory, Checking 
And Erasing

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 57: V.A.G 1551 Scan Tool Display - Checking EVAP System For Leak (10 Of 11) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Press button -4- for "Basic setting" function ("Tank venting valve diagnosis" will be initiated).  

Indicated on display: (1-4 = Display zones) 

NOTE:

The engine must not be loaded during this diagnosis because the diagnosis will 
be interrupted and will not be started again until the engine is revved-up.

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 58: V.A.G 1551 Scan Tool Display - Checking EVAP System For Leak (11 Of 11) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

When the diagnosis is initiated by the Engine Control Module, the display in display zone 4 jumps from "Test 
OFF" to "Test ON." 

z

Run engine at idling speed until specification "EVAP OK" is displayed in display zone 4.  

DISPLAY IN DISPLAY ZONE CHECK 

NOTE:

If the display jumps from "Test ON" to "Test OFF" during the test, rev up briefly 
and the test will be repeated.

-

Display zones

1

2

3

4

Display group 70: Evaporative Emission (EVAP) system diagnosis (tank venting system)

Display

xxx.x %

xxx.x %

xxx %

Test OFF/Test ON

EVAP

(1)

 OK

EVAP not OK

Indicated

Opening of EVAP canister 

purge regulator valve 

during diagnostic

oxygen sensor 

control value 

Bank 1

Condition of EVAP 

canister purge regulator 

valve 

(relative EVAP -

specification)

Diagnostic 

condition and 

Diagnostic result

Working 

0.0-100.0%

-100.0-100.0%

0-199%

-

 

2003 Volkswagen New Beetle GLS 

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

  

If "EVAP n. OK" appears in display zone 4: 

z

Initiate output diagnostic test mode and activate EVAP Canister Purge Regulator Valve -N80-: 

See Output Diagnostic Test Mode (DTM), Initiating 

z

Read readiness code.  

See Readiness Code, Displaying 

If DTC memory has been erased or Engine Control Module separated from permanent (battery) positive, 
readiness code must be generated again. 

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

If the specification "EVAP OK" is obtained: 

z

Press --> button.  

z

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

z

Switch ignition off.  

Checking for leaks 

If a small or large leak is detected during the check of the Evaporative Emission (EVAP) system, proceed as 
follows. 

z

Switch ignition off.  

z

Check whether sealing cap of fuel tank is completely closed or whether sealing ring is leaking, replace if 
necessary.  

z

Repeat functional check.  

Is the malfunction still present: 

z

Fold rear seat bench forward.  

z

Remove cover under seat bench.  

z

Check whether locking ring for fuel delivery unit is tight. It can be found under luggage compartment 
floor trim. Replace seal if it is malfunctioning.  

z

Tighten locking ring with special tool 3217. 

range
Specified 
value

-

-

-

EVAP OK.

(1)

TEV means EVAP canister purge regulator valve

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

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