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Home › Ford › 1993 › Explorer 2D Utility, RWD, Automatic › Repair and Diagnosis › Brakes › Traction Control › Anti-Lock Brake System - 4-Wheel › Diagnosis › Drive Test Code 16 › Unwarranted ABS Activity Test

Unwarranted ABS Activity Test

  1. Drive vehicle at approximately 20 MPH. If windshield wipers are on, turn wipers off. Perform light to medium normal stop. Check for brake pedal pulsation. If ABS pump motor runs, brake pedal pulsation is felt at any time during stop and ABS warning light is not on, go to SYMPTOM A  under SYMPTOM TESTS.
  2. If pump motor runs, brake pedal pulsation is felt at any time during stop and ABS warning light comes on and stays on, go to OBTAINING DIAGNOSTIC TROUBLE CODE TEST  . If pump motor does not run and brake pedal pulsation is not felt at any time during stop, but other symptoms exist, go to BRAKE SYMPTOM TEST  .
  3. If pump motor does not run, brake pedal pulsation is not felt at any time during stop and ABS light is not on, go to HIGH SENSOR GAP TEST  . If vehicle pulls immediately upon braking and pump motor does not run, go to SYMPTOM E  under SYMPTOM TESTS.
  4. If vehicle pulls as soon as pump motor runs, check front sensor opposite pull. Go to SYMPTOM A  under SYMPTOM TESTS. If pump motor runs and no pull is felt, check rear sensor. Go to SYMPTOM A  under SYMPTOM TESTS.
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