2003 Audi A4 Wiring Diagrams

2003 Audi A4 Quattro
2003 SYSTEM WIRING DIAGRAMS Audi - A4
2003 SYSTEM WIRING DIAGRAMS
Audi - A4
USING MITCHELL1'S WIRING DIAGRAMS

For information on using these wiring diagrams, see USING MITCHELL1'S SYSTEM WIRING
DIAGRAMS article.
AIR CONDITIONING
Thursday, February 15, 2018 10:13:20

10:13:06 AM Page 1 © 2011 Mitchell Repair Information Company, LLC.
Fig. 1: Air Conditioning Circuit (1 of 2)
Thursday, February 15, 2018 10:13:06 AM Page 2 © 2011 Mitchell Repair Information Company, LLC.
Fig. 2: Air Conditioning Circuit (2 of 2)
ANTI-LOCK BRAKES
Fig. 3: Anti-lock Brakes Circuit
ANTI-THEFT
Fig. 4: Anti-theft Circuit, W/ Convertible
Fig. 5: Anti-theft Circuit, W/O Convertible
BODY CONTROL MODULES
Fig. 6: Body Control Modules Circuit
COMPUTER DATA LINES
Fig. 7: Data Link Connector Circuit, W/ Convertible
Fig. 8: Data Link Connector Circuit, W/O Convertible
Fig. 9: High/Low Bus Circuit, W/ Convertible
Fig. 10: High/Low Bus Circuit, W/O Convertible
COOLING FAN
Fig. 11: Cooling Fan Circuit
CRUISE CONTROL
Fig. 12: Cruise Control Circuit
DEFOGGERS
Fig. 13: Heated Mirrors Circuit
Fig. 14: Rear Defogger Circuit, W/ Convertible
Fig. 15: Rear Defogger Circuit, W/O Convertible
ELECTRONIC POWER STEERING
Fig. 16: Electronic Power Steering Circuit
ENGINE PERFORMANCE
1.8L
Fig. 17: 1.8L, Engine Performance Circuit (1 of 4)
3.0L
EXTERIOR LIGHTS
Fig. 25: Backup Lamps Circuit, Avant (High Line)
Fig. 26: Backup Lamps Circuit, Avant (Low Line)
Fig. 27: Backup Lamps Circuit, W/ Convertible
Fig. 28: Backup Lamps Circuit, W/O Convertible, Sedan
Fig. 29: Exterior Lamps Circuit, Avant (High Line)
Fig. 30: Exterior Lamps Circuit, Avant (Low Line)
Fig. 31: Exterior Lamps Circuit, W/ Convertible
Fig. 32: Exterior Lamps Circuit, W/O Convertible, Sedan
GROUND DISTRIBUTION
Fig. 33: Ground Distribution Circuit, W/ Convertible (1 of 2)
Fig. 34: Ground Distribution Circuit, W/ Convertible (2 of 2)
Fig. 35: Ground Distribution Circuit, W/O Convertible (1 of 2)
Fig. 36: Ground Distribution Circuit, W/O Convertible (2 of 2)
HEADLIGHTS
Fig. 37: Headlamps & Fog Lamps Circuit, W/ Convertible W/ High Intensity Gas Discharge Headlights
Fig. 38: Headlamps & Fog Lamps Circuit, W/ Convertible W/ Standard Headlights
Fig. 39: Headlamps & Fog Lamps Circuit, W/O Convertible W/ High Intensity Gas Discharge Headlights
High Option Content
Fig. 40: Headlamps & Fog Lamps Circuit, W/O Convertible W/ High Intensity Gas Discharge Headlights
Low Option Content
Fig. 41: Headlamps & Fog Lamps Circuit, W/O Convertible W/ Standard Headlights
HORN
Fig. 42: Horn Circuit
INSTRUMENT CLUSTER
Fig. 43: Instrument Cluster Circuit, W/ Convertible
Fig. 44: Instrument Cluster Circuit, W/O Convertible
INTERIOR LIGHTS
Fig. 45: Courtesy Lamps Circuit, Avant (1 of 2)
Fig. 46: Courtesy Lamps Circuit, Avant (2 of 2)
Fig. 47: Courtesy Lamps Circuit, Convertible (1 of 2)
Fig. 48: Courtesy Lamps Circuit, Convertible (2 of 2)
Fig. 49: Courtesy Lamps Circuit, Sedan (1 of 2)
Fig. 50: Courtesy Lamps Circuit, Sedan (2 of 2)
Fig. 51: Instrument Illumination Circuit, W/ Convertible
Fig. 52: Instrument Illumination Circuit, W/O Convertible
MEMORY SYSTEMS
Fig. 53: Memory Systems Circuit, W/ Convertible (1 of 4)
Fig. 57: Memory Systems Circuit, W/O Convertible (1 of 2)
Fig. 58: Memory Systems Circuit, W/O Convertible (2 of 2)
NAVIGATION
Fig. 59: Navigation Circuit
POWER DISTRIBUTION
Fig. 60: Power Distribution Circuit, W/ Convertible (1 of 2)
Fig. 61: Power Distribution Circuit, W/ Convertible (2 of 2)
Fig. 62: Power Distribution Circuit, W/O Convertible (1 of 2)
Fig. 63: Power Distribution Circuit, W/O Convertible (2 of 2)
POWER DOOR LOCKS
Fig. 64: Power Door Locks Circuit, W/ Convertible
Fig. 65: Power Door Locks Circuit, W/O Convertible (1 of 2)
Fig. 66: Power Door Locks Circuit, W/O Convertible (2 of 2)
POWER MIRRORS
Fig. 67: Automatic Day/Night Mirror Circuit
Fig. 68: Power Mirror Circuit
POWER SEATS
Fig. 69: Heated Seats Circuit
Fig. 70: Power Seats Circuit
POWER TOP/SUNROOF
Fig. 71: Convertible Top Circuit (1 of 2)
Fig. 72: Convertible Top Circuit (2 of 2)
Fig. 73: Sunroof Circuit
POWER WINDOWS
Fig. 74: Power Windows Circuit, W/ Convertible
Fig. 75: Power Windows Circuit, W/O Convertible
Fig. 76: Rear Window Sun Shade Circuit
RADIO
Fig. 77: Radio Circuit, W/ Convertible, W/ Bose
Fig. 78: Radio Circuit, W/ Convertible, W/O Bose
Fig. 79: Radio Circuit, W/O Convertible, W/ Amplifier
Fig. 80: Radio Circuit, W/O Convertible, W/ Bose
Fig. 81: Radio Circuit, W/O Convertilbe, W/O Amplifier
SHIFT INTERLOCK
Fig. 82: Shift Interlock Circuit, W/ CVT
Fig. 83: Shift Interlock Circuit, W/ Tiptronic, W/O CVT
STARTING/CHARGING
Fig. 84: Charging Circuit
Fig. 85: Starting Circuit, 5 Speed A/T
Fig. 86: Starting Circuit, M/T
Fig. 87: Starting Circuit, W/ CVT
SUPPLEMENTAL RESTRAINTS
Fig. 88: Supplemental Restraints Circuit, W/ Convertible (1 of 2)
Fig. 89: Supplemental Restraints Circuit, W/ Convertible (2 of 2)
Fig. 90: Supplemental Restraints Circuit, W/O Convertible (1 of 2)
Fig. 91: Supplemental Restraints Circuit, W/O Convertible (2 of 2)
TRANSMISSION
Fig. 92: A/T Circuit, W/ CVT
Fig. 93: A/T Circuit, W/O CVT
TRUNK, TAILGATE, FUEL DOOR
Fig. 94: Trunk & Fuel Door Release Circuit
WARNING SYSTEMS
Fig. 95: Warning Systems Circuit
WIPER/WASHER
Fig. 96: Jet Heater Circuit
Fig. 97: Wiper/Washer Circuit

2003 Audi A4 Wiring Diagrams

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2003 Audi A4 Quattro

2003 SYSTEM WIRING DIAGRAMS Audi - A4

2003 SYSTEM WIRING DIAGRAMS

USING MITCHELL1'S WIRING DIAGRAMS

Thursday, February 15, 2018 10:13:20

Fig. 1: Air Conditioning Circuit (1 of 2)

Fig. 2: Air Conditioning Circuit (2 of 2)

Fig. 3: Anti-lock Brakes Circuit

Fig. 4: Anti-theft Circuit, W/ Convertible

Fig. 5: Anti-theft Circuit, W/O Convertible

BODY CONTROL MODULES

Fig. 6: Body Control Modules Circuit

COMPUTER DATA LINES

Fig. 7: Data Link Connector Circuit, W/ Convertible

Fig. 8: Data Link Connector Circuit, W/O Convertible

Fig. 9: High/Low Bus Circuit, W/ Convertible

Fig. 10: High/Low Bus Circuit, W/O Convertible

Fig. 11: Cooling Fan Circuit

Fig. 12: Cruise Control Circuit

Fig. 13: Heated Mirrors Circuit

Fig. 14: Rear Defogger Circuit, W/ Convertible

Fig. 15: Rear Defogger Circuit, W/O Convertible

ELECTRONIC POWER STEERING

Fig. 16: Electronic Power Steering Circuit

Fig. 17: 1.8L, Engine Performance Circuit (1 of 4)

Fig. 18: 1.8L, Engine Performance Circuit (2 of 4)

Fig. 19: 1.8L, Engine Performance Circuit (3 of 4)

Fig. 20: 1.8L, Engine Performance Circuit (4 of 4)

Fig. 21: 3.0L, Engine Performance Circuit (1 of 4)

Fig. 22: 3.0L, Engine Performance Circuit (2 of 4)

Fig. 23: 3.0L, Engine Performance Circuit (3 of 4)

Fig. 24: 3.0L, Engine Performance Circuit (4 of 4)

Fig. 25: Backup Lamps Circuit, Avant (High Line)

Fig. 26: Backup Lamps Circuit, Avant (Low Line)

Fig. 27: Backup Lamps Circuit, W/ Convertible

Fig. 28: Backup Lamps Circuit, W/O Convertible, Sedan

Fig. 29: Exterior Lamps Circuit, Avant (High Line)

Fig. 30: Exterior Lamps Circuit, Avant (Low Line)

Fig. 31: Exterior Lamps Circuit, W/ Convertible

Fig. 32: Exterior Lamps Circuit, W/O Convertible, Sedan

Fig. 33: Ground Distribution Circuit, W/ Convertible (1 of 2)

Fig. 34: Ground Distribution Circuit, W/ Convertible (2 of 2)

Fig. 35: Ground Distribution Circuit, W/O Convertible (1 of 2)

Fig. 36: Ground Distribution Circuit, W/O Convertible (2 of 2)

High Option Content

Low Option Content

Fig. 42: Horn Circuit

Fig. 43: Instrument Cluster Circuit, W/ Convertible

Fig. 44: Instrument Cluster Circuit, W/O Convertible

Fig. 45: Courtesy Lamps Circuit, Avant (1 of 2)

Fig. 46: Courtesy Lamps Circuit, Avant (2 of 2)

Fig. 47: Courtesy Lamps Circuit, Convertible (1 of 2)

Fig. 48: Courtesy Lamps Circuit, Convertible (2 of 2)

Fig. 49: Courtesy Lamps Circuit, Sedan (1 of 2)

Fig. 50: Courtesy Lamps Circuit, Sedan (2 of 2)

Fig. 51: Instrument Illumination Circuit, W/ Convertible