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HOMESERVICE MANUALSAUDI1998A4 AVANT QUATTRO, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESANTI-LOCK BRAKESANTI-LOCK BRAKE SYSTEM/TRACTION CONTROL - 5.3DTC TESTINGABS MODULE CIRCUITS
1998 Audi A4 Avant Quattro, Automatic

Abs Module Circuits

1998 Audi A4 Avant Quattro, AutomaticSECTION Abs Module Circuits

When checking ABS control module circuit, refer to ABS MODULE TERMINAL IDENTIFICATION (A4)  table. See Fig 1 .

ABS MODULE TERMINAL IDENTIFICATION (A4)

Terminal No. Related Circuit
1 Right Rear Wheel Speed Sensor
2 (1)(2) Right Rear Wheel Speed Sensor
3 (1) Right Front Wheel Speed Sensor
4 (2) Right Front Wheel Speed Sensor
5 Right Front Wheel Speed Sensor
6 Left Front Wheel Speed Sensor
7 Left Front Wheel Speed Sensor
8 Left Rear Wheel Speed Sensor
9 Left Rear Wheel Speed Sensor
10 (3) Instrument Cluster Processor
11 K-Wire
13 (4) PCM; Engine Torque & Misfire Monitoring
14 Stoplight Switch
15 (1) Right Front ABS Wheel Speed Sensor
16 Ground; ABS Return Flow Pump
17 Positive Battery Voltage
18 Positive Battery Voltage
19 Ground; ABS Control Module
20 (4) Traction Control Indicator Light Activation
21 ABS Warning Light Activation
23 (5) Left Rear Speed Sensor Output
24 (5) Right Rear Speed Sensor Output
27 PCM; Engine Torque Input (Actual)
28 (4) Transmission Control Signal
30 (4) Engine RPM Signal
31 ASR Switch (Traction Control System)
(1) Vehicles with front wheel drive and ABS/EDL/TCS.
(2) Vehicles with all-wheel drive and ABS/EDL.
(3) Only vehicles equipped with EDL.
(4) Only vehicles equipped with TCS.
(5) In vehicles with navigation system.
Fig 1: Identifying Terminals Of ABS Control Module (A4)
G98I11138Courtesy of AUDI OF AMERICA, INC.
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.