Volkswagen Workshop Service and Repair Manuals

• Motronic control unit (J220)*
• ◆ Fitting location , engine compartment overview
• ◆ For injection system, Lambda regulation, activated charcoal filter tank venting valve, knock control, speed governing, ignition and self-diagnosis
• ◆ Checking voltage supply => Page 24-129
• ◆ Procedure after voltage supply open circuit => Page 24-133
• ◆ Renew => Page 24-135
• ◆ If replaced carry out basic setting => Page 24-141
• ◆ On replacement, the control unit must be matched to the electronic immobilizer => Page 24-147

• Retaining frame
• Supply hose
• ◆ Black with white marks
• ◆ Secure with spring-type clips
• ◆ Check securely seated
• ◆ From fuel filter:

=> Repair Group 20; Removing and installing parts of fuel supply system; Removing and installing fuel tank with attachments and fuel filter

• Return hose
• ◆ Blue or with blue marking
• ◆ Secure with spring-type clips
• ◆ Check securely seated
• ◆ To the fuel delivery unit in fuel tank

=> Repair Group 20; Removing and installing parts of fuel supply system; Removing and installing fuel tank with attachments and fuel filter

• 10 Nm
• Cable/line guide
• ◆ Clipped onto fuel rail
• Securing clip
• ◆ Note version
• Connector
• ◆ Black, 2-pin
• ◆ For injector (N30...N33)
• Connector
• ◆ Black, 6-pin
• ◆ For throttle valve control part (J338)
• ◆ Connector contacts are gold-plated
• Connector
• ◆ Black, 4-pin
• ◆ For intake manifold pressure sender and sender for intake air temperature in intake manifold
• ◆ Connector contacts are gold-plated

• Fuel manifold with injectors
• ◆ Dismantling and assembling => Page 24-20
• Vacuum hose
• 20 Nm
• Intake manifold
• ◆ Dismantling and assembling => Page 24-20
• From brake servo
• From EGR valve (N18)*
• 5 Nm
• Engine speed sender (G28)*
• ◆ Fitting location => Page 24-1 , fitting location overview
• ◆ To remove, remove intake manifold item 14
• ◆ Checking => Page 24-72

• Connector
• ◆ Only engines fulfilling EU 4 standard
• ◆ For Lambda probe 2 after catalyst (G130) and Lambda probe heating (Z29)
• ◆ Black, 4-pin
• ◆ Contacts 3 and 4 gold plated
• Lambda probe 2 after catalyst (G130)*, 50Nm
• ◆ Only engines fulfilling EU 4 standard
• ◆ Fitting location => Page 24-1 , engine compartment overview
• ◆ Grease only the threads with "G 052 112 A3"; "G 052 112 A3" must not get into the slots on the probe body
• ◆ Probe heating voltage supply via fuel pump relay (J17)
• ◆ Check Lambda probe heating for Lambda probe after catalyst => Page 24-41
• ◆ Check Lambda probe and Lambda regulation after catalyst => Page 24-113

• Lambda probe 1 before catalyst (G39)*, 50Nm
• ◆ Fitting location => Page 24-1 , engine compartment overview
• ◆ Grease only the threads with "G 052 112 A3"; "G 052 112 A3" must not get into the slots on the probe body
• ◆ Probe heating voltage supply via fuel pump relay (J17)
• ◆ Checking Lambda probe heating before catalyst => Page 24-34
• ◆ Checking Lambda probe and Lambda regulation before catalyst
  => Page 24-104
• Engines conforming to EU 4 standard
• ◆ Checking Lambda probe ageing Lambda probe 1 => Page 24-122

• Connector
• ◆ For Lambda probe 1 before catalyst (G39) and Lambda probe heating (Z19)
• Engines conforming to MVEG II standard
• ◆ Black, 4-pin
• ◆ Connector contacts 3 and 4 are gold-plated
• Engines conforming to EU 4 standard
• ◆ Black, 6-pin
• ◆ Contacts gold plated
• Seal
• ◆ Renew
• Thermostat housing
• Retaining clip
• ◆ Check seated securely
• O-ring
• ◆ Renew if damaged

• Coolant temperature sender (G62)*
• ◆ Green
• ◆ For engine control unit
• ◆ With coolant temperature gauge sender (G2)
• ◆ If necessary release pressure in cooling system before removing
• ◆ Resistance values between contacts 1 and 3
  , Fig. 1
• ◆ Checking
• Connector
• ◆ Black, 4-pin
• ◆ For coolant temperature sender (G62) and coolant temperature gauge sender (G2)
• Plug
• ◆ If necessary release pressure in cooling system before removing

• Guide tube
• ◆ For dipstick
• 6 Nm
• ◆ Notes on installing => Page 24-28
• Vent pipe
• ◆ From tank venting valve in activated charcoal filter:

=> Repair group 20; Activated charcoal filter system

• Connector
• ◆ Only disconnect or connect with ignition switched off