1990 Audi 100 (C4-4A) Service and Repair Manual

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Distributeur:

UGS: 81770

Mots clés: 100 1990 Audi Car

Variantes de produits

Description

This manual provides comprehensive service and repair information for the 1990 Audi 100 (C4-4A), encompassing all sedan and Avant variants. Representing sophisticated German engineering, the Audi 100 of this era was positioned as a premium mid-size executive vehicle, known for its refined interior, robust build quality, and the availability of the renowned Quattro all-wheel-drive system. This generation, produced from 1990 to 1994, featured sleeker styling and improved aerodynamics, offering a compelling alternative to established European luxury sedans. The vehicle’s engineering philosophy emphasized driver comfort and performance, with available five-cylinder engines and advanced fuel injection systems of the time. This Service and Repair Manual is designed to assist professional technicians and experienced DIY enthusiasts in maintaining and repairing the 1990 Audi 100. It covers a vast range of systems, including engine mechanicals, fuel injection, ignition, cooling, lubrication, transmission (manual and automatic), driveline, suspension, steering, braking systems (including ABS), and electrical systems. Detailed procedures for routine maintenance, complex repairs, and systematic troubleshooting are provided, along with essential technical specifications, torque values, and diagnostic charts. With over 1000 pages of dealership-level technical data, this manual is an indispensable resource for ensuring the optimal performance and longevity of your Audi 100.

🏷️ Basic Information

Identification

Make:

Model:

Year:

Codes

Chassis Code:

C4-4A

👋 Introduction

Market Position

Segment:

Mid-size executive sedan and wagon, positioned as a premium European alternative.

Competitive Analysis

Competitors:

BMW 5 Series, Mercedes-Benz E-Class, Volvo 740/940, Saab 9000.

Key Features

Design Philosophy:

Sophisticated German engineering, Quattro all-wheel-drive availability, refined interior, and strong build quality.

📋 Manual Details

Coverage Areas

Primary Coverage:

Comprehensive service and repair for the 1990 Audi 100 (C4-4A).

Model Variants Covered:

All models and configurations of the 1990 Audi 100 (C4-4A) including sedan and Avant variants.

Page Count

Estimated Page Count:

1000+

Manual Type

Type:

Service and Repair Manual

Purpose:

Designed for professional technicians and experienced DIY enthusiasts.

Content Focus:

Technical service data, repair instructions, diagnostic procedures, specifications, and torque values.

Language

Language:

English

Format

Format:

PDF Download

📖 Manual Coverage

Systems Covered

Engine Systems:

Engine mechanical (block, head, pistons, crankshaft, camshafts), fuel injection (CIS-E, KE-Jetronic), ignition, cooling, lubrication, exhaust, emissions control.

Transmission Systems:

Manual and automatic transmission overhaul, clutch, driveline, CV joints, differentials.

Chassis And Suspension:

Front and rear suspension, steering system, wheel bearings, shock absorbers, springs, bushings.

Brake Systems:

Hydraulic brake system, ABS (Anti-lock Braking System), brake pads, rotors, calipers, lines, master cylinder.

Electrical Systems:

Wiring diagrams, starter, alternator, battery, lighting, instruments, dashboard controls, fuses, relays, onboard diagnostics (OBD).

Body And Interior:

Body panels, doors, locks, hinges, glass, upholstery, climate control, HVAC, seat adjustments.

Cooling System:

Radiator, water pump, thermostat, heater core, fan operation, coolant flush procedures.

Lubrication System:

Oil pump, oil filter housing, oil pan, oil cooler (if equipped).

Ignition System:

Distributor, ignition coil, spark plug wires, spark plugs, ignition control module (ECU).

Procedures Included

Maintenance Procedures:

Routine maintenance checks, oil changes, filter replacements, fluid level checks, belt inspections and replacement, spark plug replacement.

Repair Procedures:

Engine rebuilds, transmission repairs, suspension component replacement, brake service, electrical component diagnosis and repair, body panel repair.

Troubleshooting Diagnostics:

Systematic diagnostic procedures, fault code interpretation, symptom-based troubleshooting for all major vehicle systems.

Bodywork Repair:

Panel alignment, rust repair techniques, body trim removal and installation, window sealing.

Diagnostic Charts:

Detailed fault-finding charts correlating symptoms to potential causes and diagnostic steps.

Technical Depth

Depth:

In-depth, dealership-level technical information covering complete overhauls, complex diagnostics, and specialized repair procedures.

📊 Manual Specifications

File Format

File Type:

Print Quality

Resolution:

High-resolution scans for clear text and legible diagrams.

Binding Type

Binding Type:

N/A (Digital PDF)

Paper Type

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine

Engine Code Common:

Various, including 5-cylinder variants (e.g., 2.3L, 2.2L Turbo).

Engine Displacement Example:

2.3 Liters (2309 cc)

Engine Configuration Example:

Inline 5-cylinder, SOHC or DOHC

Performance Example

Horsepower Example:

~130 hp @ 5500 rpm (2.3E)

Torque Example:

~137 lb-ft @ 3000 rpm (2.3E)

Fuel System

Fuel Delivery:

Bosch CIS-E (Continuous Injection System - Electronic) or KE-Jetronic fuel injection.

Fuel Type:

Unleaded Gasoline

🔧 Transmission

Standard

Transmission Type Standard:

5-speed Manual Transmission

Optional

Transmission Type Optional:

ZF 4-speed Automatic Transmission (e.g., 4HP22)

Features

Drivetrain Options:

Front-wheel drive (FWD) and permanent all-wheel drive (Quattro).

📐 Dimensions

Exterior Sedan Example

Length:

Approx. 4770 mm (187.8 in)

Width:

Approx. 1777 mm (70.0 in)

Height:

Approx. 1420 mm (55.9 in)

Wheelbase:

Approx. 2700 mm (106.3 in)

Weights Example

Curb Weight:

Approx. 1400-1500 kg (3086-3307 lbs)

🛡️ Safety Features

Ratings

Crash Test Data:

While specific ratings for the 1990 model may be limited by modern standards, the C4 platform was known for robust construction.

Active Features

Optional Anti-lock Braking System (ABS) on many models.

Passive Features

Airbags:

Driver's airbag standard on later models of this generation, passenger airbag optional.

Seatbelts:

Three-point inertia reel seatbelts with pre-tensioners.

💡 Technology Features

Infotainment

Audio System:

Factory-installed Audi radio/cassette players, often with premium sound options (e.g., Bose).

Climate Control:

Manual or automatic climate control (Climatronic) with recirculate function.

Driver Assistance

Cruise Control:

Optional cruise control system.

Connectivity

Connectivity Features:

Limited by modern standards; primarily focused on vehicle mechanics and comfort features.

🔧 Maintenance

Service Intervals

Oil Change Interval Example:

Every 10,000 km (6,000 miles) or 12 months, whichever comes first.

Timing Belt Replacement Example:

Every 80,000 - 100,000 km (50,000 - 60,000 miles) or 5 years.

Fluid Specifications

Engine Oil Type Example:

API SG or higher, SAE 5W-40 or 10W-40 depending on climate.

Coolant Type Example:

G11 (Blue-Green) ethylene glycol coolant.

Brake Fluid Type:

DOT 3 or DOT 4.

Automatic Transmission Fluid Example:

G 052 162 A1 or equivalent ATF (e.g., Dexron II).

Known Issues

Common Electrical Problems:

Corrosion in wiring harnesses, faulty door lock actuators, headlight switch failure.

Common Engine Problems:

Degradation of vacuum lines, distributor cap/rotor wear, idle control valve issues, oil leaks from seals.

Common Suspension Problems:

Worn ball joints, control arm bushings, and strut mounts.

Common Fuel System Problems:

Warm-up regulator (WUR) issues with CIS-E systems, fuel accumulator failure.

📚 Vehicle History

Brand Heritage

Audi Legacy:

Audi, part of the Volkswagen Group, has a long history of engineering innovation, particularly in Quattro all-wheel drive and front-wheel-drive technology.

Model Evolution

C4 Generation:

The C4 generation of the Audi 100 debuted in 1990 as the successor to the C3 generation. It represented a significant modernization with sleeker styling and improved aerodynamics.

Production

Production Years C4:

1990-1994

Manufacturing Location:

Germany

🏆 Awards & Recognition

Recognitions

General Reputation:

The Audi 100 (C4) was generally well-received for its refinement, build quality, and the availability of Quattro.