Audi Workshop Service and Repair Manuals

• Connector
• ◆ For engine control unit
• ◆ Only disconnect or connect with ignition switched off
• ◆ Release to disconnect

• Engine control unit*
• ◆ Fitting location: In plenum chamber
• ◆ For injection system, Lambda regulation, activated charcoal filter solenoid valve, knock control, governed speed, ignition and self-diagnosis
• ◆ Checking voltage supply
  
• ◆ Procedure after voltage supply open circuit
• ◆ Renew => Page 24-134
• ◆ Coding => Page 24-136
• ◆ When renewing, erase learnt values and adapt engine control unit to throttle valve control part=> Page 24-140
• ◆ On replacement, the control unit must be matched to the electronic immobilizer

=> Electrical system, Final control diagnosis; Repair group 01

• Connector
• ◆ Black, 4-pin
• ◆ For engine speed sender (G28)
• ◆ Connector contacts are gold-plated
• Connector
• ◆ Black, 4-pin
• ◆ For engine speed sender (G28)
• Air cleaner
• ◆ Dismantling and assembling => Page 24-20
• Securing clip
• ◆ Note version
• Cable/line guide
• ◆ Clipped onto fuel rail

• Connector
• ◆ Black, 2-pin
• ◆ For injector (N30...N33)
• Supply pipe/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

• 10 Nm
• Fuel manifold with injectors
• ◆ Dismantling and assembling => Page 24-18

• 20 Nm
• Connector
• ◆ Black, 6-pin
• ◆ For throttle valve control part (J338)
• ◆ Connector contacts are gold-plated
• From activated charcoal filter solenoid valve (N80)*/**

=> Repair group 20; Activated charcoal filter system

• ◆ Secure with spring-type clips

• From brake servo
• Intake manifold
• ◆ Dismantling and assembling => Page 24-18
• Seal
• ◆ Renew
• ◆ Note fitting position

• Lambda probe 1 before catalyst (G39)*, 50Nm
• ◆ Location: In front exhaust pipe for cylinders 4, 5 and 6
• ◆ Grease only the threads with "G 052 112 A3"; "G 052 112 A3" must not get into the slots on the probe body
• ◆ Remove and install with Lambda probe open ring spanner set 3337
• ◆ Probe heating voltage supply via fuel pump relay (J17)
• ◆ Checking Lambda probe heating before catalyst => Page 24-29
• ◆ Checking Lambda probe and Lambda regulation before catalyst
  => Page 24-96
• 4-pin connector
• ◆ Black
• ◆ For Lambda probe 1 before catalyst (G39) and Lambda probe heating (Z19)
• ◆ Contacts 3 and 4 gold plated

• Engine speed sender (G28)*
• ◆ Fitting location: Cylinder block exhaust side
• ◆ Checking => Page 24-63
• 5 Nm
• Guide tube
• ◆ For dipstick
• 3 Nm
• ◆ Notes on installing => Page 24-23
• Retaining clip
• ◆ Check seated securely
• O-ring
• ◆ Renew

• Connector
• ◆ Black, 4-pin
• ◆ For coolant temperature sender (G62) and coolant temperature gauge sender (G2)
• ◆ Connector contacts are gold-plated
• Plug
• ◆ If necessary release pressure in cooling system before removing
• Coolant temperature sender (G62)*
• ◆ 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
• Thermostat housing