🏷️ Basic Information

Make:

Audi

Model:

S4

Model Variant:

Typ 89 (B3)

Years Covered:

1992, 1993

Chassis Code:

Typ 89 (B3)

👋 Introduction

Target Audience:

Audi enthusiasts, independent repair shops, DIY mechanics specializing in vintage Audi performance vehicles.

Value Proposition:

Provides critical, often hard-to-find, detailed electrical information essential for maintaining and repairing a classic performance Audi, where dealer support is limited.

Specificity:

Focuses solely on the electrical schematics, offering unparalleled depth for that specific domain.

Problem Solving:

Empowers owners to diagnose and fix complex electrical gremlins that plague older vehicles.

📋 Manual Details

Primary Focus:

Electrical System Wiring Diagrams

Secondary Focus:

System Wiring, Electrical Components

Specific Diagrams:

Includes wiring diagrams for engine control, transmission control (if applicable), ABS, instrument cluster, climate control, lighting, power accessories, and body control modules.

Estimated Pages:

Likely 100-250 pages (typical for comprehensive wiring diagrams)

Type:

System Wiring Electrical Diagrams Manual

Language:

English

Format:

Likely PDF or Printed Book

📖 Manual Coverage

Electrical System:

Comprehensive coverage of all electrical circuits

Engine Management:

Engine Control Unit (ECU) wiring, sensors, actuators

Fuel System:

Fuel pump, injectors, fuel level sender wiring

Ignition System:

Ignition coil, distributor, ECU control wiring

Lighting System:

Headlights, taillights, interior lighting, fog lights

Instrument Cluster:

Gauges, warning lights, dashboard illumination

HVAC System:

Climate control module, blower motor, sensors wiring

Audio System:

Radio, amplifier, speaker wiring

Power Accessories:

Power windows, door locks, mirrors, sunroof wiring

Safety Systems:

ABS wiring, potentially early airbag system wiring

Chassis Electrical:

Wiper/washer system, horn, starter, alternator wiring

ECU Pinouts:

Detailed pin assignments for the Engine Control Unit

Fuse Relay Locations:

Diagrams and identification of all fuse boxes and relays

Troubleshooting:

Component-level diagnosis based on electrical faults

Component Identification:

Locating specific electrical components and connectors

Wiring Repair:

Guidance on tracing and repairing damaged wires/connectors

Component Testing:

Methods for testing the functionality of electrical components

Diagnostic Procedures:

Systematic approach to diagnosing electrical issues

Depth:

Highly detailed, component-level electrical diagnosis and repair

Scope:

Essential for diagnosing intermittent electrical faults, sensor issues, and module communication problems.

Diagnostic Tools:

While the manual itself isn't diagnostic tool specific, understanding its diagrams is crucial for using tools like multimeters, oscilloscopes, and logic probes effectively.

📊 Manual Specifications

Format:

Digital (PDF) or Printed Paper

Searchability:

If PDF, generally searchable text is expected for efficient use.

Print Quality:

High-resolution diagrams for clarity; typically black and white with color-coded wires indicated.

Binding:

If printed: Coil-bound for lay-flat viewing in a workshop environment, or perfect bound.

Paper Quality:

Durable paper stock suitable for workshop use, often with a matte finish to reduce glare.

⚙️ Engine Specifications

Engine Code:

ABY (or similar variant like AAN for some markets)

Engine Type:

Inline 5-cylinder, turbocharged, intercooled

Displacement:

2.2 Liters (2226 cc)

Bore X Stroke:

80.5 mm x 86.4 mm

Compression Ratio:

8.5:1

Horsepower:

230 PS (227 hp / 169 kW) at 5900 rpm

Torque:

350 Nm (258 lb-ft) at 2000-4500 rpm

Fuel Delivery:

Bosch Motronic (likely Motronic 2.3.2 or similar) Electronic Fuel Injection (EFI)

Fuel Type:

Unleaded Premium Gasoline (Octane Rating 91 RON or higher recommended)

Ignition System:

Distributorless Ignition System (DIS) with individual ignition coils per cylinder.

🔧 Transmission

Type:

5-speed Manual Transmission (016)

Type:

4-speed Automatic Transmission (097)

Drivetrain:

Quattro Permanent All-Wheel Drive (AWD)

AWD System:

Torsen center differential, optionally with rear limited-slip differential (ASD).

📐 Dimensions

Length:

Approx. 4535 mm (178.5 in)

Width:

Approx. 1700 mm (66.9 in)

Height:

Approx. 1415 mm (55.7 in)

Wheelbase:

Approx. 2610 mm (102.8 in)

Curb Weight:

Approx. 1500-1550 kg (3307-3417 lbs)

🛡️ Safety Features

Crash Safety:

European NCAP ratings were not standard for this era; relied on internal Audi safety standards.

ABS:

Standard Anti-lock Braking System (ABS)

Airbags:

Driver's side airbag typically standard; passenger airbag optional or absent depending on market/trim.

Seatbelts:

Pre-tensioned front seatbelts.

💡 Technology Features

Audio System:

Audi Symphony II or similar period-appropriate premium sound system, often with cassette and optional CD changer.

Cruise Control:

Standard electronic cruise control.

Telematics:

No modern connectivity features like Bluetooth or integrated navigation. Communication systems are basic (e.g., antenna for radio).

🔧 Maintenance

Oil Change:

Typically every 7,500-10,000 miles or 12 months, whichever comes first, depending on driving conditions.

Spark Plugs:

15,000-30,000 miles (depending on type - e.g., copper vs. platinum)

Timing Belt:

Crucial! 60,000 miles or 5 years is a common interval for this 5-cylinder engine. Failure is catastrophic.

Engine Oil:

SAE 5W-40 or 10W-40 synthetic or semi-synthetic oil, meeting VW 500.00 or 502.00 specifications.

Coolant:

G11 (Blue/Green) or G12 (Pink/Red) coolant, 50/50 mix with distilled water. Consult manual for exact spec.

Brake Fluid:

DOT 4

Transmission Fluid Manual:

API GL-4 or GL-5, SAE 75W-90 synthetic gear oil.

Transmission Fluid Auto:

G 004 000 (or equivalent) ATF fluid.

Power Steering Fluid:

G 002 000 (or equivalent) hydraulic fluid.

Transfer Case Fluid:

Likely SAE 75W-90 gear oil, but specific Audi spec should be consulted.

Differential Fluid Rear:

Likely SAE 75W-90 gear oil, potentially with an LSD additive if equipped.

Electrical Gremlins:

Common issues include failing door lock actuators, intermittent gauge cluster problems, window regulator failures, and worn wiring harnesses (especially near heat sources).

Engine Management Sensors:

Failure of coolant temperature sensors, throttle position sensors (TPS), and MAF sensors can cause drivability issues.

Boost Leaks:

Cracked vacuum lines and intercooler hoses can lead to loss of boost and poor performance.

Oil Leaks:

Valve cover gaskets, oil pan gaskets, and front/rear main seals are common leak points.

Suspension Components:

Worn control arm bushings, ball joints, and tie rod ends are typical for vehicles of this age and mileage.

Climate Control:

HVAC blower motor resistor failure is common, leading to only high fan speeds or no fan operation.

📚 Vehicle History

Audi Sport:

The S4 designation signifies Audi's sport division, building upon the reputation of Audi's engineering prowess in performance vehicles.

S4 B3 Lineage:

The B3 S4 was the second generation of the S4, evolving from the Ur-S4/S6 lineage, continuing the 5-cylinder turbo performance legacy.

Production Years:

1991-1994 for the S4/S6 (Typ 89/C4 platform)

Manufacturing Location:

Germany

🏆 Awards & Recognition

Performance Accolades:

While specific awards for the '92-'93 S4 might not be widely documented, the model was recognized for its strong performance, rally-bred chassis, and luxury appointments in its era, often compared favorably to BMW M3 and Mercedes-Benz 190E 2.3-16.