Volkswagen New Beetle. Manual - part 1423

 

  Index      Volkswagen     Volkswagen New Beetle 1998-2008 year - service repair manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  1421  1422  1423  1424   ..

 

 

Volkswagen New Beetle. Manual - part 1423

 

 

Fig. 22: Pulling Off Supply Pipe/Hose 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Connect pressure gauge VAG 1318 with adapter 1318/23 and VAG 1318/17 to fuel supply hose. 

Fig. 23: Connecting Pressure Gauge VAG 1318 With Adapter 1318/23 And VAG 1318/17 To Fuel 
Supply Hose
 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Push hose VAG 1318/1 onto adapter VAG 1318/11 on pressure gauge and hold hose in a measuring 
container.  

z

Open pressure gauge cut-off tap. Lever then points in throughflow direction -A-.  

z

Operate remote control VAG 1348/3A and slowly close cut-off tap, until pressure gauge shows 3 bar. 
From this point on do not move position of cut-off tap.  

z

Empty measuring container.  

z

Fuel pump delivery range is dependent upon battery voltage. Therefore, connect multimeter with adapter 
cables from VAG 1594A to vehicle battery.  

z

Operate remote control for 30 seconds and measure battery voltage. 

 

2003 Volkswagen New Beetle GLS 

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

  

z

Compare quantity of fuel delivered with specification.  

Fig. 24: Minimum Delivery V/S Voltage Graph 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

*) Minimum delivery cm

3

 /30 seconds

 

**) Voltage at fuel pump with engine stationary and pump running (approx. 2 volts less than battery voltage). 

Example: 

During the test a voltage of 12.5 volts is measured at the battery. As the voltage at the pump is approx. 2 volts 
less than the battery voltage then this will equate to a minimum delivery of 200 cm

3

 /30 s. 

If the minimum delivery rate is not attained: 

z

Check fuel lines for possible restrictions (kinks) or blockages.  

z

Pull supply hose off fuel filter inlet.  

z

Connect pressure gauge VAG 1318 with adapter 1318/17 to fuel supply hose. 

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 25: Connecting Pressure Gauge VAG 1318 With Adapter 1318/17 To Fuel Supply Hose 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Repeat delivery rate check.  

If the minimum delivery rate is now attained: 

z

Replace fuel filter.  

If the minimum delivery rate is again not attained: 

z

Remove fuel delivery unit and check strainer filter for soiling. 

Only when up to now no malfunction has been detected: 

z

Fuel pump malfunctioning, replace fuel delivery unit. See FUEL DELIVERY UNIT, REMOVING 
AND INSTALLING
 .  

z

Check DTC memory: 

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

z

Read readiness code: 

See Readiness Code, Displaying . 

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

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

If the delivery rate has been attained but nevertheless a fuel supply system malfunction is suspected (e.g. 
intermittent failure of fuel supply system), check the current draw of the fuel pump as follows:

 

2003 Volkswagen New Beetle GLS 

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

  

z

Reconnect all disconnected fuel hoses.  

z

Connect multimeter VAG 1715 to wire -arrow- for terminal 1 of 4-pin connector using pick-up clamp. 

Fig. 26: Connecting Multimeter VAG 1715 To Wire For Terminal 1 Of 4-Pin Connector Using 
Pick-Up Clamp
 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Start engine and run at idling speed.  

z

Measure current draw of fuel pump. 

Specification: max. 8 amps. 

Observe the valid safety precautions when performing a road test. 

See Safety Precautions . 

If the current draw is exceeded: 

z

Fuel pump malfunctioning, replace fuel delivery unit. See FUEL DELIVERY UNIT, REMOVING 
AND INSTALLING
 .  

z

Check DTC memory: 

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

z

Read readiness code: 

See Readiness Code, Displaying . 

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

NOTE:

If the fuel system malfunction is intermittent, you can perform the check during 
a test drive, to do this a 2nd person is necessary.

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

Content   ..  1421  1422  1423  1424   ..