Segment:
Full-size Luxury Sedan/Saloon
Key Competitors:
BMW 7 Series, Mercedes-Benz S-Class, Lexus LS, Jaguar XJ
Drivetrain:
Permanent All-Wheel Drive (Quattro)
Engine Configuration:
V8 Naturally Aspirated
Chassis Technology:
Advanced suspension and chassis design for its era.
Electrical Systems:
Comprehensive coverage of all electrical systems including engine management, lighting, instrumentation, comfort features, and safety systems.
Powertrain Electronics:
Detailed wiring for Motronic engine control unit, ignition, fuel injectors, fuel pump, alternator, and starter.
Lighting Systems:
Includes diagrams for headlights, front parking lights, side markers, turn signals, brake lights, rear park lights, tail lights, fog lights, license plate lights, and interior/reading lights.
Instrumentation And Diagnostics:
Coverage of instrument cluster, CAT control, diagnostic connector, board computer, and various sensor wiring.
Comfort And Convenience:
Wiring for automatic transmission, air conditioning, power windows, power sunroof, cruise control, central locking, heated lock systems, power mirrors, power seats with memory, heated seats, and interior lighting (glove compartment, ashtray, footwell, luggage compartment).
Safety Systems:
Includes diagrams for airbag systems, anti-lock brake system (ABS), brake pad wear indicators, brake light switch, and anti-theft systems.
Auxiliary Systems:
Schematics for washer/wipers, headlight washers, horn, cigar lighters, and radios.
Troubleshooting Assistance:
While not a repair manual, these diagrams are crucial for diagnosing electrical faults and understanding circuit functionality.
Component Identification:
Helps identify the location and connections of various electrical components.
Wiring Repair And Modification:
Essential for performing accurate wiring repairs, modifications, or installations.
Detail Level:
High level of detail, showing specific wire colors, connector pinouts, and component connections.
Diagnostic Value:
Provides the foundational knowledge required for advanced electrical diagnostics and fault finding.
Engine Type:
Naturally Aspirated V8
Displacement:
3.6 liters (3562 cc)
Bore X Stroke:
82.5 mm x 86.4 mm
Compression Ratio:
10.0:1
Cylinder Head Design:
DOHC, 4 valves per cylinder
Engine Codes:
ABH (3.6L), AQH (4.2L - later models within the 1988-1998 range, though the product title specifies V8 Quattro and the diagrams align with the earlier 3.6L primarily)
Horsepower:
240 hp @ 5400 rpm (3.6L ABH)
Torque:
317 lb-ft @ 3000 rpm (3.6L ABH)
Fuel Delivery:
Bosch Motronic M2.3 electronic fuel injection
Fuel Type:
Unleaded Premium (91+ RON)
Transmission Type:
4-speed Automatic (ZF 4HP24)
Manual Transmission Availability:
Not available on V8 Quattro models.
Drivetrain Layout:
Permanent All-Wheel Drive (Quattro) with Torsen center differential and optional rear sport differential.
Transmission Fluid Type:
Refer to manual for specific ZF fluid type (e.g., ATF Dexron II or equivalent).
Safety Certification:
No official crash test ratings from NHTSA or IIHS readily available for this era and model, but built to high European safety standards.
Active Safety:
Anti-lock Braking System (ABS), Quattro All-Wheel Drive, Servotronic power steering.
Passive Safety:
Front airbags (driver and passenger), reinforced safety cell, side impact beams.
Oil Change Interval:
Every 7,500-10,000 miles or 12 months, whichever comes first (refer to specific model year manual).
Timing Belt Replacement:
Every 60,000-90,000 miles or 5-7 years, depending on climate and driving conditions. Critical due to interference engine design.
Engine Oil Type:
Synthetic 5W-40 or 10W-40 (API SJ or higher, ACEA A3/B4) - consult owner's manual for exact OEM specification.
Coolant Type:
G11 (Blue) or G12 (Red) ethylene glycol coolant, mixed 50/50 with distilled water.
Power Steering Fluid:
Pentosin CHF 11S or equivalent hydraulic fluid.
Common Failures:
Climate control blower motor resistor failure, ABS sensor failures, coolant flange leaks, O2 sensor degradation, fuel pump wear, distributor cap/rotor wear.
Electrical Gremlins:
Due to age, vacuum leaks and degraded wiring insulation can lead to intermittent electrical issues, making these diagrams invaluable.
Audi History:
Audi, part of the Volkswagen Group, has a long history of engineering innovation, particularly known for its Quattro all-wheel-drive system introduced in the 1980s.
V8 Quattro Introduction:
The V8 Quattro (D1 platform) was Audi's flagship sedan, intended to compete with established luxury brands. It was the first Audi to feature a V8 engine and the Quattro system as standard.
Platform Transition:
Succeeded by the Audi A8 (D2 platform) in 1994, which continued the legacy of Audi's V8-powered luxury saloon.
Production Years:
1988-1994
Manufacturing Location:
Ingolstadt, Germany
