Section 3 (Anti-Lock Brake System)

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 1989 Audi 90, 1989 Audi 80, 1989 Audi 200, 1989 Audi 100, and 1988 Audi 90. However, it is still accessible from the selected car via links, so may be relevant.

Description
Operation
- Abs Control Unit
- Speed Sensor
Bleeding Brake System
Testing & Diagnosis
- Description Of Diagnostic System
  - System Warnings & Precautions
  - Test Equipment
- Pre-Diagnosis Inspection
- Diagnostic Procedure
  - Equipment Hook-Up
  - Preparation
Testing
- Operational Test
- Hydraulic Modulator - Hydraulic Pressure Test
- "Anti-Lock" Light
Test 1
- 80/90 QUATTRO & 5000CS QUATTRO
- 80/90, 5000S & 5000CS Turbo
Test 2
- All Models
Test 3
- All Models
Test 4
- All Models
Test 5
- All Models
Test 6
- 80/90 QUATTRO & 5000CS QUATTRO
- 5000S & 5000CS Turbo
Test 7
- All Models
Test 8
- All Models
Test 9
- All Models
Test 10
- All Models
Test 11
- All Models
Test 12
- All Models
Test 13
- All Models
Test 14
- All Models
Test 15
- All Models
Test 16
- All Models
Test 17
- All Models
Test 18
- 80/90 QUATTRO & 5000CS QUATTRO
- 5000S & 5000CS Turbo
Test 19
- 5000CS QUATTRO
- 5000S & 5000CS Turbo
Test 20, 21 & 22
- All Models
Test 23
- All Models
Test 24
- All Models
Final Check
- All Models
Removal & Installation
- Anti-Lock Brake System (Abs) Control Unit
  - Notes
  - Removal & Installation
- Hydraulic Modulator
  - Removal & Installation
- Front Speed Sensor
  - Removal & Installation (With Retaining Bolt)
  - Removal & Installation (Without Retaining Bolt)
- Rear Speed Sensor
  - Removal & Installation (All Quattro Models)
  - Removal & Installation (80/90, 5000S & 5000CS Turbo)
Wiring Diagrams