Mazda Trucks 1987-1993 Repair Guide

4-WHEEL ANTI-LOCK BRAKE SYSTEM (4WABS)

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This system is used on the 1993 Navajo.

The 4WABS system consists of the following components:

  1. The anti-lock Hydraulic Control Unit (HCU)
  2.  
  3. 4WABS electronic control module
  4.  
  5. The front wheel speed sensors-located on the steering knuckles
  6.  

  1. The rear speed sensor-located on the rear axle housing.
  2.  
  3. The front speed sensor tone rings
  4.  
  5. The rear speed sensor tone rings
  6.  
  7. The G-switch
  8.  
  9. The ABS main system and pump motor relays
  10.  

 
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