ENGINE PERFORMANCE – Audi A4 Quattro 2004 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

1.8L

1.8L, Engine Performance Wiring Diagram (1 of 4) for Audi A4 Quattro 2004

List of elements for 1.8L, Engine Performance Wiring Diagram (1 of 4) for Audi A4 Quattro 2004:

• (left center of firewall) g12
• (left end of dash)
• (left rear of engine compt) e-box relay carrier
• Accelerator pedal position (app) sensor (above accelerator pedal)
• Brake- light switch
• Clutch vacuum vent valve switch (m/t) (above clutch pedal)
• Cooling fans system
• Fuse 10a
• Fuse 15a
• Fuse 40a
• Fuse holder
• G12 (left center of firewall)
• Generator
• Heated oxygen sensor (on exhaust system)
• Hot at all times
• Hot in run or start
• Ignition switch
• Mass airflow (maf) sensor (right side of engine compt)
• Motronic engine control module (in plenum chamber e-box)
• Off
• Oxygen sensor behind twc
• Red
• Run
• Secondary air injection (air) pump relay
• Secondary air injection pump motor
• Start
• Steering column electronic systems control module (top of steering column)
• T16a
• Transmission control module (w/ cvt) (in plenum chamber e-box)

1.8L, Engine Performance Wiring Diagram (2 of 4) for Audi A4 Quattro 2004

List of elements for 1.8L, Engine Performance Wiring Diagram (2 of 4) for Audi A4 Quattro 2004:

• (left front of engine compt) wastegate bypass regulator valve
• (on radiator) engine coolant temperature (ect) sensor
• (right rear of engine compt) evaporative emission (evap) canister purge regulator valve
• Charge air pressure sensor (behind left headlight)
• Engine speed (rpm) sensor (on rear of engine)
• Fuse 15a
• Fuse holder (left end of dash)
• Hot at all times
• Knock sensor (ks) 1 (left rear of engine)
• Knock sensor (ks) 2 (left front of engine)
• Leak detection pump (ldp) (left rear wheelwell)
• Map controlled engine cooling thermostat
• Nca
• Red
• Secondary air injection (air) solenoid valve (bottom of intake manifold)
• Turbocharger recirculating valve (bottom of intake manifold)

1.8L, Engine Performance Wiring Diagram (3 of 4) for Audi A4 Quattro 2004

List of elements for 1.8L, Engine Performance Wiring Diagram (3 of 4) for Audi A4 Quattro 2004:

• (a/t) brake booster relay
• (left center of firewall)
• (left rear of engine compt) e-box relay carrier
• (left side of engine compt) brake system vacuum pump
• (mil)
• (rear of cylinder head) engine coolant temperature (ect) sensor
• (right side of master cylinder) (a/t) brake booster pressure sensor
• Camshaft adjustment valve 1
• Camshaft position sensor (left front of cylinder head)
• Coil
• Computer data lines system
• Data link connector
• Fuse 15a
• Fuse 20a
• Fuse holder (left end of dash)
• G12
• G12 (left center of firewall)
• G18 (front of right valve cover)
• Instrument cluster
• Intake air temperature sensor (near throttle body)
• Malfunction indicator lamp
• Nca
• Red
• T32a/12
• T32a/13
• T32a/23
• To spark plug

1.8L, Engine Performance Wiring Diagram (4 of 4) for Audi A4 Quattro 2004

List of elements for 1.8L, Engine Performance Wiring Diagram (4 of 4) for Audi A4 Quattro 2004:

• 150a
• 9-pin relay carrier (behind left side of dash)
• E-box relay carrier (left rear of engine compt)
• Fuel injectors
• Fuel pump motor
• Fuel pump relay
• Fuse 15a
• Fuse 20a
• Fuse holder (left end of dash)
• G78 (lower right "b" pillar)
• Hot at all times
• Main fuse (on battery positive terminal)
• Motronic engine control module (left rear of engine compt)
• Red
• Relay plate
• Throttle valve control module (on throttle body)
• Transmission control module
• W/ cvt
• W/o cvt

3.0L

3.0L, Engine Performance Wiring Diagram (1 of 4) for Audi A4 Quattro 2004

List of elements for 3.0L, Engine Performance Wiring Diagram (1 of 4) for Audi A4 Quattro 2004:

• (left center of firewall) g12
• (left rear of engine compt) e-box relay carrier
• Brake- light switch
• Clutch vacuum vent valve switch (m/t)
• Fuse 10a
• Fuse 15a
• Fuse 40a
• Fuse holder (left end of dash)
• G12 (left center of firewall)
• Heated oxygen sensor (on exhaust system)
• Heated oxygen sensor 2 (on exhaust system)
• Hot at all times
• Hot in run or start
• Ignition switch
• Mass airflow (maf) sensor (right rear of engine compt)
• Motronic engine control module (left rear of engine compt)
• Off
• Oxygen sensor (behind twc)
• Oxygen sensor 2 (behind twc)
• Red
• Run
• Secondary air injection (air) pump relay
• Secondary air injection pump motor
• Start
• Steering column electronic systems control module (top of steering column)
• T16a
• Throttle position (tp) sensor (above accelerator sensor)
• Trans- mission control module (w/cvt) (left rear of engine compt)

3.0L, Engine Performance Wiring Diagram (2 of 4) for Audi A4 Quattro 2004

List of elements for 3.0L, Engine Performance Wiring Diagram (2 of 4) for Audi A4 Quattro 2004:

• (behind right cyl head) engine coolant temperature (ect) sensor
• (front of intake manifold) intake manifold change-over valve
• (if equipped) after-run coolant pump
• (on e-box relay carrier) (if equipped) coolant circulation pump relay
• (right rear of engine compt) evaporative emission (evap) canister purge regulator valve
• Camshaft position sensor 2
• Camshaft position sensor 4 (rear of left cylinder head)
• Engine speed (rpm) sensor (left rear of engine)
• Fuse 15a
• Fuse holder (left end of dash)
• G12 (left center of firewall)
• Hot at all times
• Knock sensor (ks) 1 (under right side of intake)
• Knock sensor (ks) 2 (under left side of intake)
• Leak detection pump (ldp) (left rear wheelwell)
• Nca
• Red
• Secondary air injection (air) solenoid valve (top left rear of engine)

3.0L, Engine Performance Wiring Diagram (3 of 4) for Audi A4 Quattro 2004

List of elements for 3.0L, Engine Performance Wiring Diagram (3 of 4) for Audi A4 Quattro 2004:

• (a/t) brake booster relay
• (front of left cylinder head) camshaft adjustment valve 2
• (front of right cylinder head) camshaft adjustment valve 1
• (left center of firewall)
• (left rear of engine compt) e-box relay carrier
• (left side of engine compt) brake system vacuum pump
• (mil)
• (right side of master cylinder) (a/t) brake booster pressure sensor
• (under left side of dash) data link connector
• Camshaft position sensor
• Camshaft position sensor 3
• Coil
• Computer data lines system
• Fuse 15a
• Fuse 20a
• Fuse holder (left end of dash)
• G12
• G12 (left center of firewall)
• G18 (front of right valve cover)
• Instrument cluster
• Malfunction indicator lamp
• Nca
• Red
• T32a/12
• T32a/13
• T32a/23
• To spark plug

3.0L, Engine Performance Wiring Diagram (4 of 4) for Audi A4 Quattro 2004

List of elements for 3.0L, Engine Performance Wiring Diagram (4 of 4) for Audi A4 Quattro 2004:

• 150a
• 9-pin relay carrier (behind left side of dash)
• Cooling fan system
• E-box relay carrier (left rear of engine compt)
• Fuel injectors
• Fuel pump motor
• Fuel pump relay
• Fuse 15a
• Fuse 20a
• Fuse holder (left end of dash)
• G78 (lower right "b" pillar)
• Hot at all times
• Main fuse (on battery positive terminal)
• Motronic engine control module (left rear of engine compt)
• Red
• Relay plate
• Throttle valve control module (on throttle body)
• Transmission control module (left rear of engine compt)
• W/ cvt
• W/o cvt