SERVICE MANUAL
  Applies to: Hyundai Coupe/Tiburon 1998-2000
GROUP
Brake Systems Anti-lock Brake System
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CIRCUIT INSPECTION (SPEED SENSOR CIRCUIT - AIR GAP SYMPTOM) 

At each wheel hub there is a tone wheel and an inductive sensor, which supplies the wheel speed information to the ABSCM. The sensor is comprised of a magnet and a pole piece surrounded by a coil. When the tone wheel rotates adjacent to the sensor pole piece, an alternating current signal is generated in the coil with a frequency proportional to wheel speed.

A special integrated circuit in the ABSCM translates the generated AC signal to a square wave.

This square wave is used by the microprocessor to operate the ABS.

DTC
Code
 DISPLAY ON
SCAN TOOL
 Symptom
 Possible cause
31
 LF WHEEL SPEED SENSOR AIR GAP
 Air gap ON sensor LF incorrect
  • Wheel speed sensor air gap
  • Wheel speed sensor
  • Harness or connector between the wheel speed sensor and ABSCM
  • ABSCM
32
 RF WHEEL SPEED SENSOR AIR GAP
 Air gap ON sensor RF incorrect
33
 LR WHEEL SPEED SENSOR AIR GAP
 Air gap ON sensor LR incorrect
34
 RR WHEEL SPEED SENSOR AIR GAP
 Air gap ON sensor RR incorrect
WIRING DIAGRAM
INSPECTION PROCEDURE
  1. Check Wheel Speed Sensor

  1. Check the harness and the connector between the ABSCM and each wheel speed sensor