ENGINE PERFORMANCE – Audi S4 Quattro 2004 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.2L

4.2L, Engine Performance Wiring Diagram (1 of 4) for Audi S4 Quattro 2004

List of elements for 4.2L, Engine Performance Wiring Diagram (1 of 4) for Audi S4 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
• Mass airflow (maf) sensor (right rear of engine compt)
• Motronic engine control module (left rear of engine compt)
• Oxygen sensor (behind twc)
• Oxygen sensor 2 (behind twc)
• Red
• Secondary air injection (air) pump relay
• Secondary air injection pump motor
• Steering column electronic systems control module (top of steering column)
• T16a
• Throttle position (tp) & accelerator pedal position (app) sensors (above accelerator pedal)

4.2L, Engine Performance Wiring Diagram (2 of 4) for Audi S4 Quattro 2004

List of elements for 4.2L, Engine Performance Wiring Diagram (2 of 4) for Audi S4 Quattro 2004:

• (if equipped) after-run coolant pump
• (left center of firewall) g12
• (on e-box relay carrier) (if equipped) coolant circulation pump relay
• (on engine) engine coolant temperature (ect) sensor
• (right rear of engine compt) evaporative emission (evap) canister purge regulator valve
• Engine speed (rpm) sensor (left rear of engine)
• Knock sensor (ks) 1
• Knock sensor (ks) 2
• Knock sensor (ks) 3
• Knock sensor (ks) 4
• Leak detection pump (ldp) (left rear wheelwell)
• Nca
• Red
• Secondary air injection (air) solenoid valve (top left rear of engine)

4.2L, Engine Performance Wiring Diagram (3 of 4) for Audi S4 Quattro 2004

List of elements for 4.2L, Engine Performance Wiring Diagram (3 of 4) for Audi S4 Quattro 2004:

• (front of left cylinder head) camshaft adjustment valve 2
• (front of right cylinder head) camshaft adjustment valve 1
• (left rear of engine compt) e-box relay carrier
• (mil)
• (under left side of dash) data link connector
• Camshaft position sensor
• Camshaft position sensor 2
• Coil 1
• Coil 2
• Coil 3
• Coil 4
• Coil 5
• Coil 6
• Coil 7
• Coil 8
• Computer data lines system
• Exhaust flap valve
• Fuse 15a
• Fuse 20a
• Fuse holder (left end of dash)
• G12 (left center of firewall)
• G19 (near ignition coil)
• Hot at all times
• Ignition switch
• Instrument cluster
• Malfunction indicator lamp
• Nca
• Off
• Red
• Run
• Start
• T32a/12
• T32a/13
• T32a/23
• To spark plug

4.2L, Engine Performance Wiring Diagram (4 of 4) for Audi S4 Quattro 2004

List of elements for 4.2L, Engine Performance Wiring Diagram (4 of 4) for Audi S4 Quattro 2004:

• 150a
• 9-pin relay carrier (behind left side of dash)
• Cooling fans 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
• Intake manifold change- over valve
• Left electro- hydraulic engine mount solenoid
• Main fuse (on battery positive terminal)
• Motronic engine control module (left rear of engine compt)
• Red
• Relay plate
• Right electro- hydraulic engine mount solenoid
• Throttle valve control module (on throttle body)
• Transmission control module (left rear of engine compt)