Volkswagen New Beetle. Manual - part 1268

 

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

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  1266  1267  1268  1269   ..

 

 

Volkswagen New Beetle. Manual - part 1268

 

 

Fig. 25: Identifying Special Tools Display (3 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Display in field 2 must fluctuate every 10 seconds between EGR active or EGR inactive (n.aktiv). 

Displays in display zones 3 and 4 must fluctuate within following control range: 

See Mass Air Flow (MAF) Sensor -G70-, Checking . 

If EGR NOT active: 

Specification display zone 3: 420 to 560 mg/stroke 

Specification display zone 4: 0 to 5% 

If EGR active: 

Specification display zone 3: 170 to 340 mg/stroke 

Specification display zone 4: 95 to 100% 

If specifications not obtained: 

z

Check mechanical EGR valve. See EXHAUST GAS RECIRCULATION (EGR) VALVE, 
CHECKING
 .  

z

Check vacuum hoses. See VACUUM HOSE CONNECTIONS, DIAGRAM .  

z

Check EGR Vacuum Regulator solenoid valve as follows: 

NOTE:

If a constant value of 550 mg/H is indicated in display zone 3, check Mass Air 
Flow sensor.

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - 1.9L 4-Cyl. - ALH, New Beetle

  

z

Press --> button.  

z

Press 0 and 6 buttons to select Function 06: "End transfer"  

z

Press Q button to enter input.  

z

Switch ignition off.  

z

Disconnect harness connector -1- from EGR valve -2-. 

Fig. 26: Locating Harness Connector 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Measure resistance across valve. 

Specification: 14 to 20 ohms 

If specification not obtained: 

z

Replace EGR Vacuum Regulator solenoid valve -N18-. 

If specification obtained: 

z

Switch ignition on.  

z

Measure supply voltage at valve connector terminal 1 and at engine Ground. 

NOTE:

At room temperature, resistance lies in the lower tolerance range and in 
the upper range at operating temperature.

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - 1.9L 4-Cyl. - ALH, New Beetle

  

Fig. 27: Identifying EGr Vacuum Regulator Solenoid Valve Connector Terminal 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Specification: approx. battery voltage 

If specification not obtained: 

z

Switch ignition off.  

z

Connect Test Box VAG 1598/22 to ECM wiring harness. 

Fig. 28: Connecting Test Box VAG 1598/22 To ECM Wiring Harness 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Check wiring for open circuit between Test Box and harness connector using wiring diagram.  

Up to MY 1999 

z

Socket 1 + terminals 2 + 28  

z

Socket 2 + terminal 29  

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - 1.9L 4-Cyl. - ALH, New Beetle

  

From MY 2000 

z

Socket 1 + terminals 1 + 2  

z

Socket 2 + terminal 61  

Wire resistance: 1.5 ohms maximum 

z

Check wires for short to one another, to vehicle Ground and to battery Positive (+). 

Specification: "INFINITE" ohms 

If wiring OK: 

z

Replace Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248: 

See Engine Control Module (ECM), Replacing .

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - 1.9L 4-Cyl. - ALH, New Beetle

  

 

 

 

 

 

 

 

Content   ..  1266  1267  1268  1269   ..