ENGINE PERFORMANCE – Audi A8 Quattro L TDI 2014 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.0L SC

3.0L SC, Engine Performance Wiring Diagram (1 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L SC, Engine Performance Wiring Diagram (1 of 9) for Audi A8 Quattro L TDI 2014:

• (behind right kick panel) g43
• Accelerator pedal position sensor & accelerator pedal position (app) sensor 2 (at accelerator pedal)
• Comfort system central control module (right forward wall of luggage compt)
• Computer data lines system
• Cooling fan control module
• Cooling fan control module 2
• Cooling fans system
• Engine control module (ecm) (center rear of engine compt)
• Fuse 15a
• Fuse 5a
• Fuse panel a (right side of engine compt)
• G43 (behind right kick panel)
• Nca
• Oil level thermal sensor (bottom of engine oil pan)
• Oxygen sensor (02s) 2 after catalytic converter (twc) & oxygen sensor (o2s) 2 after catalytic converter heater
• Red
• Starting/ charging system
• Starting/charging system
• T17f
• T17k
• T2t
• T2u
• T32c
• T32d
• T94

3.0L SC, Engine Performance Wiring Diagram (2 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L SC, Engine Performance Wiring Diagram (2 of 9) for Audi A8 Quattro L TDI 2014:

• (right side of engine compt) fuse panel a
• 10a
• 11a
• 12a
• Battery interrupt igniter
• Battery jump start terminal (terminal 30 wire
• Engine temperature control sensor (right side of engine)
• Fuse 10a
• Fuse 15a
• Fuse 20a (or 30a)
• Fuse 35a
• Fuse carrier
• Fuse panel b (right end of dash)
• Fuse panel d (in luggage compt, on battery)
• Hot at all times
• Intake manifold runner position sensor (front of cylinder bank 1)
• Junction 2)
• Nca
• Oil pressure switch (right side of engine)
• Oxygen sensor (o2s) after three way catalytic converter & oxygen sensor (o2s) 1 after catalytic converter heater
• Red
• T14k
• T17f

3.0L SC, Engine Performance Wiring Diagram (3 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L SC, Engine Performance Wiring Diagram (3 of 9) for Audi A8 Quattro L TDI 2014:

• 15a
• Computer data lines system
• Engine coolant level sensor
• Fuel pump (fp) relay (in relay & fuse carrier, right side of luggage compt)
• Fuse 25a
• Fuse 5a
• Fuse carrier
• Fuse carrier 2
• Fuse panel b (right end of dash)
• G675 (right side of luggage compt)
• Hot at all times
• Red
• Reduced oil pressure switch (near engine oil filter)
• Relay/fuse panel f (right forward wall of luggage compt)
• Secondary air injection (air) solenoid valve (rear of supercharger)
• T14d
• T16c
• T17g
• T32b
• T3x
• Vehicle electrical system control module (behind left side of dash)

3.0L SC, Engine Performance Wiring Diagram (4 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L SC, Engine Performance Wiring Diagram (4 of 9) for Audi A8 Quattro L TDI 2014:

• (left rear of engine compt) heated oxygen sensor (h02s)
• (lower left of fuel tank) fuel pump (fp) control module
• (right lower c-pillar)
• (top of brake pedal assembly) brake light switch
• (upstream of left bank catalytic converter)
• Camshaft adjustment valve 1
• Camshaft adjustment valve 2
• G602 (left front footwell)
• G62
• G62 (right lower c-pillar)
• Heated oxygen sensor (ho2s) 2
• Left electrohydraulic hydraulic engine mount solenoid valve (on left engine mount)
• Nca
• Red
• Right electrohydraulic engine mount solenoid valve (on right engine mount)
• T14p
• T17f
• T17g
• T17k
• Transfer fuel pump (fp)

3.0L SC, Engine Performance Wiring Diagram (5 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L SC, Engine Performance Wiring Diagram (5 of 9) for Audi A8 Quattro L TDI 2014:

• (left front footwell) g602
• (right rear of engine, integral with iat sensor) manifold absolute pressure sensor/intake air temperature sensor
• (top of fuel tank) fuel level sensor
• Brake booster pressure sensor (w/ start/stop system) (inside plenum chamber, front of brake booster)
• Computer data lines system
• Control valve control unit
• Display unit
• Engine electronics indicator lamp
• Fuel gauge
• Fuse 5a
• Fuse carrier
• Hot at all times
• Instrument cluster control module
• Instrument cluster system
• Intake manifold runner control (imrc) valve (rear of supercharger)
• Red
• Relay/fuse panel f (right forward wall of luggage compt)
• T14b
• T14p
• T17i

3.0L SC, Engine Performance Wiring Diagram (6 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L SC, Engine Performance Wiring Diagram (6 of 9) for Audi A8 Quattro L TDI 2014:

• (front of cylinder bank 1) low fuel pressure sensor
• (left front of engine) intake manifold temperature sensor 2 & charge air pressure sensor 2
• (rear of engine) secondary air injection sensor 1
• (top left side of engine) fuel pressure sensor
• (top of cylinder bank 1) camshaft position (cmp) sensor
• (top of cylinder bank 2) camshaft position (cmp) sensor 2
• (upper right side of engine, on supercharger) intake manifold temperature sensor & charge air pressure sensor
• Engine control module (ecm) (center rear of engine compt)
• Intake manifold runner position sensor 2 (front of cylinder bank 2)
• Knock sensor (ks) 1 (inner side of cylinder bank 1)
• Knock sensor (ks) 2 (center of cylinder bank 2)
• Nca
• Red
• T14d
• T14k
• T60

3.0L SC, Engine Performance Wiring Diagram (7 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L SC, Engine Performance Wiring Diagram (7 of 9) for Audi A8 Quattro L TDI 2014:

• (rear of engine) engine speed (rpm) sensor
• (upper left of front of engine) engine coolant temperature (ect) sensor
• Charge air cooling pump (left front corner of engine compt)
• Exhaust door valve 1
• Fuel tank pressure sensor (behind right rear wheelwell liner)
• Fuse 5a
• Fuse carrier
• G639 (on left kick panel)
• Hot at all times
• Red
• Relay/fuse panel f (right forward wall of luggage compt)
• T14b
• T16a
• Transmission control module (tcm) (in bottom of transmission)
• Transmission fluid cooling valve (in lower left front of engine compt)

3.0L SC, Engine Performance Wiring Diagram (8 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L SC, Engine Performance Wiring Diagram (8 of 9) for Audi A8 Quattro L TDI 2014:

• (not used)
• 50a
• Crankcase ventilation shut-off valve
• Egr cooler switch-over valve (top center of front of engine)
• Evaporative emission (evap) canister purge regulator valve 1 (right rear of engine)
• Fuel metering valve (front of cylinder bank 1)
• Fuel tank leak detection control module (under the right rear wheel housing liner)
• G639 (on left kick panel)
• Oil pressure regulation valve (lower front of left side of engine)
• Red
• Secondary air injection (air) pump motor (left front of engine compt)
• Secondary air injection (air) pump relay (on engine compt relay carrier)
• Secondary air injection (air) solenoid valve 2 (rear of supercharger)
• Secondary air injection pump fuse
• T14d
• T17g
• T2cf

3.0L SC, Engine Performance Wiring Diagram (9 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L SC, Engine Performance Wiring Diagram (9 of 9) for Audi A8 Quattro L TDI 2014:

• (not used)
• (on right cylinder head) g600
• 14a
• Coil 1
• Coil 2
• Coil 3
• Coil 4
• Coil 5
• Coil 6
• Computer data lines system
• Cruise control system
• Engine control module (ecm) (center rear of engine compt)
• Fuel injector cylinders (cylinder 1: rear of cylinder bank 1) (cylinder 2: center of cylinder bank 1 (cylinder 6: front of cylinder bank 2) (cylinder 5: middle of cylinder bank 2) (cylinder 4: rear of cylinder bank 2) (cylinder 3: front of cylinder bank 1)
• Fuse 5a
• Fuse carrier
• G43 (behind right kick panel)
• G601 (on left cylinder head)
• Ignition coils w/ power output stage (coil 1, 2 & 3: top of cylinder bank 1) (coil 4, 5 & 6: top of cylinder bank 2)
• Nca
• Relay/fuse panel f (right forward wall of luggage compt)
• Spark plugs
• Starting/charging system
• T14d
• T14k
• T17f
• T17g
• T17k
• T60
• T94
• Throttle valve control module (behind intake manifold, on throttle valve housing)

3.0L TURBO DIESEL

3.0L Turbo Diesel, Engine Performance Wiring Diagram (1 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L Turbo Diesel, Engine Performance Wiring Diagram (1 of 9) for Audi A8 Quattro L TDI 2014:

• (behind right kick panel) g43
• (in relay & fuse carrier, right side of luggage compt) fuel pump (fp) relay
• (lower left of fuel tank) fuel pump (fp) control module
• Accelerator pedal position sensor & accelerator pedal position sensor 2 (at accelerator pedal)
• Comfort system central control module (right forward wall of luggage compt)
• Differential pressure sensor (left rear of engine compt)
• Egr motor (integral to map controlled engine cooling thermostat)
• Engine control module (ecm) (center rear of engine compt)
• G43 (behind right kick panel)
• G62 (right lower c-pillar)
• G675 (right side of luggage compt)
• Oil level thermal sensor (bottom of engine oil pan)
• Starting/charging system
• T10an
• T14p
• T17f
• T17k
• T32c
• T3x
• T91
• Transfer fuel pump
• Transmissions system
• Turbocharger control module 1 (on turbocharger housing)

3.0L Turbo Diesel, Engine Performance Wiring Diagram (2 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L Turbo Diesel, Engine Performance Wiring Diagram (2 of 9) for Audi A8 Quattro L TDI 2014:

• (in lower left front of engine compt) transmission fluid cooling valve
• 14a
• 15a
• 80a
• Automatic glow time control module (on engine compt relay carrier)
• Fuse 25a
• Fuse 35a
• Fuse 5a
• Fuse carrier 1
• Fuse carrier 2
• Fuse carrier 3
• Fuse panel b (right end of dash)
• Fuse panel f (right forward wall of luggage compt)
• G43 (behind right kick panel)
• Glow plug
• Glow plug fuse
• Hot at all times
• Mass air flow sensor (right side of engine compt)
• Red
• T17f
• T17g

3.0L Turbo Diesel, Engine Performance Wiring Diagram (3 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L Turbo Diesel, Engine Performance Wiring Diagram (3 of 9) for Audi A8 Quattro L TDI 2014:

• (center top of rear of engine) exhaust gas temperature sensor 1
• (front center of top of engine) egr temperature sensor
• (in output of scr) exhaust gas temperature sensor 4
• (rear of left side of engine compt) (w/ emissions standard bin 5/ulev) exhaust gas temperature sensor 2
• (upper center of rear of engine) exhaust gas temperature sensor 3
• Cylinder 2 combustion chamber pressure sensor & glow plug 2 (if equipped)
• G43 (behind right kick panel)
• Red
• Reduced oil pressure switch (near engine oil filter)

3.0L Turbo Diesel, Engine Performance Wiring Diagram (4 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L Turbo Diesel, Engine Performance Wiring Diagram (4 of 9) for Audi A8 Quattro L TDI 2014:

• (behind radiator) coolant fan control module
• (behind radiator) coolant fan control module 2
• 10a
• 11a
• Computer data lines system
• Cruise control system
• Engine control module (ecm) (center rear of engine compt)
• Exterior lights system
• Fuse 10a
• Fuse 15a
• Fuse 5a
• Fuse panel a (right side of engine compt)
• G43 (behind right kick panel)
• Injector (in exhaust, upstream of scr)
• Nca
• Oil pressure
• Red
• Reducing agent
• Starting/charging system
• Switch (right side of engine)
• T2t
• T2u
• T91
• W/ emissions standard bin5/ulev

3.0L Turbo Diesel, Engine Performance Wiring Diagram (5 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L Turbo Diesel, Engine Performance Wiring Diagram (5 of 9) for Audi A8 Quattro L TDI 2014:

• (top of fuel tank) fuel level sensor
• (top of fuel tank) fuel level sensor 2 & 3
• Computer data lines system
• Diesel electronics ind lamp
• Display unit
• Fuel gauge
• Fuse 5a
• Fuse carrier 6
• Fuse panel f (right forward wall of luggage compt)
• G34 (under driver's seat)
• G43 (behind right kick panel)
• G602 (left front foot well)
• Heated oxygen sensor & oxygen sensor heater (heated oxygen sensor: left rear of engine compt)
• Hot at all times
• Instrument cluster control module
• Nca
• Nox sensor & nox sensor control module (w/ emissions standard bin5/ulev) (nox sensor 2: in input to scr catalyst) (nox sensor control module 2: right front of engine compt)
• Nox sensor 2 & nox sensor control module 2 (nox sensor 2: downstream of muffler) (nox sensor control module 2: on vehicle underbody, next to muffler)
• Particulate sensor (in output of muffler)
• Standard bin5/ulev
• T14b
• T14p
• T17g
• T17i
• W/ emissions
• W/o emissions standard bin5/ulev

3.0L Turbo Diesel, Engine Performance Wiring Diagram (6 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L Turbo Diesel, Engine Performance Wiring Diagram (6 of 9) for Audi A8 Quattro L TDI 2014:

• (on reducing agent relay & fuse carrier) reducing agent metering system relay
• (right middle of engine) camshaft position sensor
• 50a
• G675 (right side of luggage compt)
• Hot at all times
• Red
• Reducing agent line heater (heating circuit 2)
• Reducing agent tank heater (heating circuit 1), reducing agent temperature sensor, reducing agent metering system pressure sensor, reducing agent reservoir sensor & reducing agent pump (integral to reducing agent tank assembly)

3.0L Turbo Diesel, Engine Performance Wiring Diagram (7 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L Turbo Diesel, Engine Performance Wiring Diagram (7 of 9) for Audi A8 Quattro L TDI 2014:

• (front center of top of engine) map controlled engine cooling thermostat
• (on right engine mount) right electrohydraulic engine mount solenoid valve
• (right front of top of engine) cylinder head coolant valve
• (top center front of engine) egr cooler switch over valve
• 30a
• Computer data lines system
• G62 (right lower c-pillar)
• Red
• Reducing agent heating fuse
• Reducing agent metering system control module (above metering agent tank, in left luggage compt)
• Reducing agent metering system fuse
• T10an
• T28a
• T8au

3.0L Turbo Diesel, Engine Performance Wiring Diagram (8 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L Turbo Diesel, Engine Performance Wiring Diagram (8 of 9) for Audi A8 Quattro L TDI 2014:

• (front left of top of engine) engine coolant temperature sensor
• (left center of front of engine) oil pressure regulation valve
• (on left engine mount) left electrohydraulic engine mount solenoid valve
• (right front of engine compt) engine coolant temperature sensor (on radiator)
• (top rear of right side of engine) fuel temperature sensor
• (upper left of front of engine) engine temperature control sensor
• Engine control module (ecm) (center rear of engine compt)
• Red
• T105
• T10an
• T17g

3.0L Turbo Diesel, Engine Performance Wiring Diagram (9 of 9) for Audi A8 Quattro L TDI 2014

List of elements for 3.0L Turbo Diesel, Engine Performance Wiring Diagram (9 of 9) for Audi A8 Quattro L TDI 2014:

• (center of cylinder bank 1) fuel injector cylinder 2
• (center right of top of engine) fuel metering valve
• (front of cylinder bank 2) fuel injector cylinder 6
• (front top of right side of engine) fuel pressure regulator valve
• (inside plenum chamber, front of brake booster) brake booster pressure sensor
• (middle of cylinder bank 2) fuel injector cylinder 5
• (rear of cylinder bank 1) fuel injector cylinder 1
• Charge air pressure sensor & intake air temperature (iat) sensor (left front corner of engine compt)
• Cooling fans system
• Engine control module (ecm) (center rear of engine compt)
• Engine speed sensor (rear of engine)
• Fuel injector cylinder 3 (front of cylinder bank 1)
• Fuel injector cylinder 4 (rear of cylinder bank 2)
• Fuel pressure sensor (top left side of engine)
• Intake flap motor (top center front of engine)
• Oil temperature sensor 2 (right side of front of engine)
• Red
• T105
• T10an
• T14b
• Throttle valve control module (front left of engine compt)

4.0L TURBO

4.0L Turbo, Engine Performance Wiring Diagram (1 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 4.0L Turbo, Engine Performance Wiring Diagram (1 of 11) for Audi A8 Quattro L TDI 2014:

• (behind right kick panel) g43
• (top of brake pedal assembly) brake lamp switch
• 14a
• Comfort system central control module (right forward wall of luggage compt)
• Cooling fans system
• Cruise control system
• Engine control module (ecm) (center rear of engine compt)
• Fuse 35a
• Fuse 5a
• Fuse carrier
• Fuse panel b (right end of dash)
• G602 (left front foot well)
• Heated oxygen sensor (left rear of engine compt)
• Heated oxygen sensor 2 (upstream of right bank catalytic converter)
• Heater for oxygen sensor 1 after catalytic converter & oxygen sensor after three way catalytic converter
• Hot at all times
• Nca
• Red
• Relay/ fuse panel f (right forward wall of luggage compt)
• Starting/ charging system
• T14b
• T17f
• T17g
• T17k
• T32c
• T91
• Transmission control module (tcm) (in bottom of transmission)
• Transmission fluid cooling valve (in lower left front of engine compt)

4.0L Turbo, Engine Performance Wiring Diagram (2 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 4.0L Turbo, Engine Performance Wiring Diagram (2 of 11) for Audi A8 Quattro L TDI 2014:

• (behind right kick panel) g43
• (on engine compt relay carrier) secondary air injection pump relay
• (right front of engine compt) secondary air injection pump motor
• 50a
• Computer data lines system
• Digital sound system control module (left forward wall of luggage compt)
• Fuse 7.5a
• Fuse carrier
• G639 (on left kick panel)
• Hot at all times
• Power distribution system
• Red
• Relay/ fuse panel f (right forward wall of luggage compt)
• Secondary air injection pump fuse
• Subframe mount actuator 1 (right front of engine compt)
• Subframe mount actuator 2 (left front of engine compt)
• Subframe mount control module (behind left wheel liner)
• Subframe mount sensor 1 (right side of engine compt)
• Subframe mount sensor 2 (left side of engine compt)
• T10ax
• T17h
• T18d

4.0L Turbo, Engine Performance Wiring Diagram (3 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 4.0L Turbo, Engine Performance Wiring Diagram (3 of 11) for Audi A8 Quattro L TDI 2014:

• 10a
• 11a
• 12a
• Brake booster pressure sensor (w/ start/ stop system) (inside plenum chamber, front of brake booster)
• Charge air cooler temperature sensor 1 (under throttle valve)
• Charge air cooler temperature sensor 2 (under throttle valve)
• Cooling fan control module
• Cooling fan control module 2
• Fuel pump (fp) relay (in relay & fuse carrier, right side of luggage compt)
• Fuel pump control module (lower left of fuel tank)
• Fuse 10a
• Fuse 15a
• Fuse 30a
• Fuse 5a
• Fuse panel a (right side of engine compt)
• G62 (right lower "c" pillar)
• G675 (right side of luggage compt)
• Manifold absolute pressure sensor (under charge air cooler housing)
• Nca
• Red
• T14b
• T14p
• T17f
• T2t
• T2u
• T3x
• T8at
• Transfer fuel pump

4.0L Turbo, Engine Performance Wiring Diagram (4 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 4.0L Turbo, Engine Performance Wiring Diagram (4 of 11) for Audi A8 Quattro L TDI 2014:

• (left front foot well) g602
• (top of fuel tank) fuel level sensor
• Camshaft adjustment valve 1
• Camshaft adjustment valve 2
• Cluster system
• Computer data lines system
• Display unit
• Engine coolant level sensor
• Engine electronics indicator lamp
• Exhaust camshaft adjustment valve 1 (rear of cylinder bank 1)
• Exhaust camshaft adjustment valve 2 (rear of cylinder bank 2)
• Exhaust door valve 1
• Exhaust door valve 2
• Fuel gauge
• Fuse 5a
• Fuse carrier 6
• G34 (under driver's seat)
• Hot at all times
• Instrument cluster control module
• Relay/ fuse panel f (right forward wall of luggage compt)
• Structure borne sound actuator
• Structure borne sound control module (if equipped) (below left front seat)
• T14p
• T16c
• T17h
• T17i
• T32
• T32b
• T4hm
• Vehicle electrical system control module (behind left side of dash)
• Wastegate bypass regulator valve (left front of engine)

4.0L Turbo, Engine Performance Wiring Diagram (5 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 4.0L Turbo, Engine Performance Wiring Diagram (5 of 11) for Audi A8 Quattro L TDI 2014:

• (middle front of left side of engine) secondary air injection solenoid valve 2
• (not used)
• (right center of front of engine) engine coolant temperature sensor
• (right side of front of engine) oil temperature sensor 2
• (top right of engine) cylinder 1 exhaust camshaft adjuster 2
• (top right of engine) cylinder 2 exhaust camshaft adjuster 3
• (top right of engine) cylinder 2 intake camshaft adjuster 2
• Cylinder 1 exhaust camshaft adjuster 3 (top right of engine)
• Cylinder 1 intake camshaft adjuster 2 (top right of engine)
• Cylinder 1 intake camshaft adjuster 3 (top right of engine)
• Cylinder 2 exhaust camshaft adjuster 2 (top right of engine)
• Cylinder 2 intake camshaft adjuster 3 (top right of engine)
• T17g

4.0L Turbo, Engine Performance Wiring Diagram (6 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 4.0L Turbo, Engine Performance Wiring Diagram (6 of 11) for Audi A8 Quattro L TDI 2014:

• (front of engine, on throttle) throttle valve control module
• (fuel injector cylinder 1, 2, 3 & 4: top of right cylinder bank) (fuel injector cylinder 5, 6, 7 & 8: top of left cylinder bank) fuel injector cylinders
• (left front of engine compt) engine coolant temperature sensor on radiator outlet
• (rear of right side of engine) intake manifold runner position sensor
• Engine control module (ecm) (center rear of engine compt)
• Oil pressure switch (right side of engine)
• Reduced oil pressure switch (lower center of right side of engine)
• T105

4.0L Turbo, Engine Performance Wiring Diagram (7 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 4.0L Turbo, Engine Performance Wiring Diagram (7 of 11) for Audi A8 Quattro L TDI 2014:

• (front of cylinder bank 2) intake manifold runner position sensor 2
• (front of cylinder bank 2) low fuel pressure sensor
• (left front of engine) charge air pressure sensor 2
• (left side of engine) fuel pressure sensor 2
• (right front of engine) secondary air injection sensor 1
• (right rear of top of engine, under cover) engine cover temperature sensor
• (right side of engine) fuel pressure sensor
• (upper left of front of engine) engine temperature control sensor
• (upper right front of engine) charge air pressure sensor
• Camshaft position sensor (side of right cylinder head)
• Camshaft position sensor 2 (center of left cylinder head)
• Camshaft position sensor 4 (top rear of left cylinder head)
• Intake air temperature (iat) sensor (rear middle of left side of engine)
• Knock sensor 1 (right side of engine)
• Knock sensor 2 (right side of engine)
• Knock sensor 3 (left side of engine)
• Knock sensor 4 (left side of engine)
• Nca
• Red

4.0L Turbo, Engine Performance Wiring Diagram (8 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 4.0L Turbo, Engine Performance Wiring Diagram (8 of 11) for Audi A8 Quattro L TDI 2014:

• Engine control module (ecm) (center rear of engine compt)
• Fuel metering valve (front of cylinder bank 1)
• Fuel metering valve 2 (top of cylinder bank 2)
• Red
• T105

4.0L Turbo, Engine Performance Wiring Diagram (9 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 4.0L Turbo, Engine Performance Wiring Diagram (9 of 11) for Audi A8 Quattro L TDI 2014:

• (left front of engine compt) after-run coolant pump
• (left rear of engine) engine coolant circulation pump 2
• (left side of transmission) transmission mount valve 2
• (lower front of left side of engine) oil pressure regulator valve
• (right side of transmission) transmission mount valve 1
• (top left of engine)
• (under left headlamp) (if equipped) transmission coolant valve
• (under left headlamp) charge air cooling pump
• Cylinder 1 exhaust camshaft adjuster 5
• Cylinder 1 exhaust camshaft adjuster 8
• Cylinder 1 intake camshaft adjuster 5
• Cylinder 1 intake camshaft adjuster 8
• Cylinder 2 exhaust camshaft adjuster 5
• Cylinder 2 exhaust camshaft adjuster 8
• Cylinder 2 intake camshaft adjuster 5
• Cylinder 2 intake camshaft adjuster 8
• G43 (behind right kick panel)
• G639 (on left kick panel)
• T14b

4.0L Turbo, Engine Performance Wiring Diagram (10 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 4.0L Turbo, Engine Performance Wiring Diagram (10 of 11) for Audi A8 Quattro L TDI 2014:

• (center of left side of engine) secondary air injection solenoid valve
• (left center of front of engine) cylinder head coolant valve
• (left side of the front of the engine) bank 2 turbocharger recirculation valve
• (lower front of left side of engine) map controlled engine cooling thermostat
• (rear right side of engine) intake manifold runner control valve
• (right front of engine) turbocharger recirculation valve
• (right rear of engine) evap canister purge regulator valve 1
• (top center of engine on inner v-cover) piston cooling nozzle control valve
• G43 (behind right kick panel)
• G600 (on right cylinder head)
• G601 (on left cylinder head)
• Ignition coils 1, 2, 3 & 4 w/ power output stage (top of cylinder bank 1)
• Ignition coils 5, 6, 7 & 8 w/ power output stage (top of cylinder bank 2)
• Nca
• T8at
• To spark plug

4.0L Turbo, Engine Performance Wiring Diagram (11 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 4.0L Turbo, Engine Performance Wiring Diagram (11 of 11) for Audi A8 Quattro L TDI 2014:

• (bottom of engine oil pan) oil level thermal sensor
• 11a
• 15a
• Accelerator pedal position sensor & accelerator pedal position sensor 2 (at accelerator pedal)
• Camshaft position sensor 3 (top rear of right cylinder head)
• Computer data lines system
• Engine control module (ecm) (center rear of engine compt)
• Engine speed sensor (lower rear of engine)
• Fuel tank leak detection control module (under right rear wheel housing liner)
• Fuel tank pressure sensor (behind right rear wheelwell liner)
• Fuse 15a
• Fuse 25a
• Fuse 5a
• Fuse carrier
• G43 (behind right kick panel)
• Heater for oxygen sensor 2 after catalytic converter & oxygen sensor after catalytic converter
• Hot at all times
• Nca
• Oil pressure switch (level 3) (center rear of top of engine)
• Relay/ fuse panel f (right forward wall of luggage compt)
• Starting/charging system
• T105
• T17f
• T17g
• T17k
• T8at
• T91

6.3L

6.3L, Engine Performance Wiring Diagram (1 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 6.3L, Engine Performance Wiring Diagram (1 of 11) for Audi A8 Quattro L TDI 2014:

• (behind right kick panel) g43
• (lower left front of engine) reduced oil pressure switch
• 14a
• Accelerator pedal position sensor & accelerator pedal position sensor 2 (at accelerator pedal)
• Air conditioning system
• Brake booster relay (on vehicle electrical system control module relay & fuse panel)
• Brake system vacuum pump (left front of engine compt)
• Comfort system central control module (right forward wall of luggage compt)
• Cooling fans system
• Cruise control system
• Engine control module (ecm) (center rear of engine compt)
• Fuse 35a
• Fuse 5a
• Fuse carrier
• Fuse panel b (right end of dash)
• G639 (on left kick panel)
• Hot at all times
• Hot w/ starter relay energized
• Relay/fuse panel f (right forward wall of luggage compt)
• Starting/ charging system
• Starting/charging system
• T14b
• T17f
• T17g
• T17k
• T32c
• T94
• Transmissions system
• W/ start stop system

6.3L, Engine Performance Wiring Diagram (2 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 6.3L, Engine Performance Wiring Diagram (2 of 11) for Audi A8 Quattro L TDI 2014:

• (on engine compt relay carrier) secondary air injection pump relay
• (top rear of engine) secondary air injection pump motor
• 16a
• 50a
• Brake booster vacuum sensor
• Fuse 15a
• Fuse carrier
• Fuse/relay panel c (behind left side of dash)
• G13
• Hot at all times
• Mass air flow sensor & intake air temperature sensor (front right corner of engine compt)
• Nca
• Oxygen sensor (in right bank catalytic converter)
• Oxygen sensor 2 (upstream of right bank catalytic converter)
• Red
• Secondary air injection pump fuse
• T14b

6.3L, Engine Performance Wiring Diagram (3 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 6.3L, Engine Performance Wiring Diagram (3 of 11) for Audi A8 Quattro L TDI 2014:

• (top of brake pedal assembly) brake lamp switch
• 10a
• 11a
• 12a
• Computer data lines system
• Cooling fans system
• Engine control module (ecm) (center rear of engine compt)
• Fuse 10a
• Fuse 15a
• Fuse 30a
• Fuse 5a
• Fuse panel a (right side of engine compt)
• G602 (left front foot well)
• Heated oxygen sensor (left rear of engine compt)
• Heated oxygen sensor 2 (upstream of right bank catalytic converter)
• Nca
• Red
• Starting/ charging system
• T17f
• T17g
• T17k
• T94

6.3L, Engine Performance Wiring Diagram (4 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 6.3L, Engine Performance Wiring Diagram (4 of 11) for Audi A8 Quattro L TDI 2014:

• (bottom of engine oil pan) oil level thermal sensor
• (front of cylinder bank 1) fuel injector cylinder 1
• (front of cylinder bank 1) fuel injector cylinder 2
• (front of cylinder bank 1) fuel injector cylinder 3
• (rear of cylinder bank 1) fuel injector cylinder 4
• (rear of cylinder bank 1) fuel injector cylinder 5
• (rear of cylinder bank 1) fuel injector cylinder 6
• (right center of front of engine) engine coolant temperature sensor
• Camshaft adjustment valve 1 (rear of cylinder bank 1)
• Cooling fans system
• Engine control module (ecm) (center rear of engine compt)
• Exhaust camshaft adjustment valve 1 (rear of cylinder bank 1)
• G43 (behind right kick panel)
• T60
• Throttle valve control module (center of right side of engine)

6.3L, Engine Performance Wiring Diagram (5 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 6.3L, Engine Performance Wiring Diagram (5 of 11) for Audi A8 Quattro L TDI 2014:

• (lower rear of engine) engine speed sensor
• (right side of transmission) transmission mount valve 1
• (w/ start/stop system) oil pressure regulation valve
• Exhaust door valve 1
• Exhaust door valve 2
• Fuel metering valve (rear of cylinder bank 1)
• G43 (behind right kick panel)
• G600 (on right cylinder head)
• Ignition coils w/ power output stage (top of cylinder bank 1)
• Nca
• Red
• T14b
• To spark plug

6.3L, Engine Performance Wiring Diagram (6 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 6.3L, Engine Performance Wiring Diagram (6 of 11) for Audi A8 Quattro L TDI 2014:

• (center rear of engine compt) engine control module (ecm)
• (center rear of top of engine) fuel pressure sensor
• (left top of rear of engine) low fuel pressure sensor
• (rear of cylinder bank 1) camshaft position (cmp) sensor
• (rear of cylinder bank 1) camshaft position sensor 3
• (rear of engine) secondary air injection sensor 1
• Knock sensor 1 (inner side of cylinder bank 1)
• Knock sensor 2 (center of top of engine)
• Nca
• Red
• T60

6.3L, Engine Performance Wiring Diagram (7 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 6.3L, Engine Performance Wiring Diagram (7 of 11) for Audi A8 Quattro L TDI 2014:

• (on engine compt relay carrier) secondary air injection pump relay 2
• (top rear of engine) secondary air injection pump motor 2
• 15a
• 50a
• Fuel pump (fp) control module (lower left of fuel tank)
• Fuel pump (fp) relay (in relay & fuse carrier, right side of luggage compt)
• Fuel tank leak detection control module (under the right rear wheel housing liner)
• Fuel tank pressure sensor (behind right rear wheelwell liner)
• Fuse 25a
• Fuse 5a
• Fuse carrier
• G13
• G62 (right lower "c" pillar)
• G675 (right side of luggage compt)
• Hot at all times
• Red
• Relay/fuse panel f (right forward wall of luggage compt)
• Secondary air injection pump fuse 2
• T14p
• T17g
• T3x
• Transfer fuel pump

6.3L, Engine Performance Wiring Diagram (8 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 6.3L, Engine Performance Wiring Diagram (8 of 11) for Audi A8 Quattro L TDI 2014:

• (center rear of engine compt) engine control module (ecm) 2
• (left side of transmission) transmission mount valve 2
• (rear of right side of engine) positive crankcase ventilation heating element
• (right side of transmission) evap canister purge regulator valve 1
• G43 (behind right kick panel)
• G601 (on left cylinder head)
• Ignition coils w/ power output stage (top of cylinder bank 2)
• Knock sensor 3 (center of top of engine)
• Knock sensor 4 (middle left of rear of engine)
• Nca
• Red
• T60a
• To spark plug

6.3L, Engine Performance Wiring Diagram (9 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 6.3L, Engine Performance Wiring Diagram (9 of 11) for Audi A8 Quattro L TDI 2014:

• (center rear of engine) secondary air injection sensor 2
• (center rear of top of engine) fuel pressure sensor 2
• (rear of cylinder bank 2) camshaft position (cmp) sensor 2
• (rear of cylinder bank 2) camshaft position sensor 4
• Engine control module (ecm) 2 (center rear of engine compt)
• Fuel metering valve 2 (top of cylinder bank 2)
• Red
• T60a
• Throttle valve control module 2 (center of left side of engine)

6.3L, Engine Performance Wiring Diagram (10 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 6.3L, Engine Performance Wiring Diagram (10 of 11) for Audi A8 Quattro L TDI 2014:

• (behind left side of dash) vehicle electrical system control module
• (left front foot well) g602
• (top of fuel tank) fuel level sensor
• Camshaft adjustment valve 2
• Cluster system
• Computer data lines system
• Display unit
• Engine control module (ecm) 2 (center rear of engine compt)
• Engine coolant level sensor
• Engine electronics indicator lamp
• Exhaust camshaft adjustment valve 2 (rear of cylinder bank 2)
• Fuel gauge
• Fuse 5a
• Fuse carrier 6
• Hot at all times
• Instrument cluster control module
• Mass airflow sensor 2 & intake air temperature sensor 2 (left front of engine compt)
• Red
• Relay/ fuse panel f (right forward wall of luggage compt)
• T14p
• T16c
• T17i
• T32
• T32b
• T8ap
• T94a

6.3L, Engine Performance Wiring Diagram (11 of 11) for Audi A8 Quattro L TDI 2014

List of elements for 6.3L, Engine Performance Wiring Diagram (11 of 11) for Audi A8 Quattro L TDI 2014:

• (behind right kick panel) g43
• (center of front of engine) oil pressure switch
• (front of cylinder bank 2) fuel injector cylinder 7
• (front of cylinder bank 2) fuel injector cylinder 8
• (front of cylinder bank 2) fuel injector cylinder 9
• (rear of cylinder bank 2) fuel injector cylinder 10
• (rear of cylinder bank 2) fuel injector cylinder 11
• (rear of cylinder bank 2) fuel injector cylinder 12
• Engine control module (ecm) 2 (center rear of engine compt)
• Heated oxygen sensor 3 (output of left exhaust manifold)
• Heated oxygen sensor 4 (upstream of left bank catalytic converter)
• Nca
• Oxygen sensor 3 (in left bank catalytic converter)
• Oxygen sensor 4 (in left bank catalytic converter)
• Red
• T94a