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Test A-1: Abs Works Frequently But Vehicle Does Not Decelerate

  1. If braking force distribution is normal between front and rear of vehicle, go to next step. If braking force is not normal between front and rear brakes, repair brakes as necessary. After repairs, go to step  8.
  2. If axle parts are not installed properly, repair as necessary. After repairs, go to step  8. If axle parts are properly installed, go to next step.
  3. Check for play in each wheel speed sensor. If play exists, repair wheel speed sensor(s) as necessary. After repairs, go to step  8. If wheel speed sensors are okay, go to next step.
  4. Inspect the condition of wheel speed sensors and sensor rings. If there is damage or excessive build-up (powdered iron) on wheel speed sensor or sensor ring, repair as necessary. After repairs, go to step  8. If wheel speed sensors and sensor rings are okay, go to next step.
  5. Check wheel speed sensor output. See TEST C-1/C-2: FRONT SENSOR OUTPUT INSPECTION  or TEST TC-1: SENSOR OUTPUT INSPECTION  under COMPONENT TESTS. If output is not normal, repair wheel speed sensor or wiring harness as necessary. After repairs, go to step  8. If wheel speed sensor output is okay, go to next step.
  6. Check rear sensor output. See TEST C-3: REAR SENSOR OUTPUT INSPECTION  under COMPONENT TESTS. Repair as necessary. After repairs, go to step  8. If rear sensor output is okay, go to next step.
  7. Check 4WD controller input. Repair as necessary. After repairs, go to next step. If 4WD controller input is okay, go to next step.
  8. Reconnect all components. Ensure all component are properly installed. Verify system operation. See SYSTEM OPERATION CHECK  under TROUBLE SHOOTING.
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