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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 312 (Anti-Lock Brake System - 4 Wheel - F150) >> Diagnosis And Testing >> Anti-Lock Control >> Component Test-Intermittent Failures >> Sensor

Component Test-Intermittent Failures: Sensor

WARNING: This page is about a different car, the 2002 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect EEC-IV 60-Pin Breakout Box to the EHCU with ABS Adapter Cable.
  2. Disconnect the suspect anti-lock brake sensor.
  3. Check the harness for short to ground.
      NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.
      Fig 1: Identifying Sensor, Breakout Box Pins And Circuits
      G02185689Courtesy of FORD MOTOR CO.
    1. Monitor the resistance between EEC-IV 60-Pin Breakout Box pins and ground as follows:
    2. Drive over rough roads at various speeds.
    3. If there is continuity between either circuit and ground, repair the circuit for a short to ground.
  4. Check harness for open circuit.
      NOTE: Connect jumper securely to the suspect sensor connector.
    1. Connect a jumper between the two pins on the suspect sensor connector.
      2. NOTE: Use 88 Digital Multimeter with the maximum resistance hold feature enabled for this test.
      Fig 2: Identifying Sensor, Breakout Box Pins And Circuits
      G02185690Courtesy of FORD MOTOR CO.
    2. Monitor the resistance between EEC-IV 60-Pin Breakout Box pins as follows:
    3. Drive over rough roads at various speeds.
    4. If there is open circuit detected between pins, repair the circuit(s) for an open circuit.
  5. Check suspect sensor electrical connector.
      NOTE: Use 88 Digital Multimeter with the maximum resistance hold feature enabled for this test.
      Fig 3: Sensor Specification Chart
      G02185691Courtesy of FORD MOTOR CO.
    1. Monitor the resistance between suspect anti-lock brake sensor terminals while wiggling the electrical connector:
    2. If the resistance is above specifications, install a new anti-lock brake sensor.
      3. NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.
      Fig 4: Sensor Specification Chart
      G02185692Courtesy of FORD MOTOR CO.
    3. Monitor the resistance between suspect anti-lock brake sensor pins (component side) while wiggling the electrical connector.
    4. If the resistance is below specifications, install a new anti-lock brake sensor.
      5. NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.
    5. Monitor the resistance between an anti-lock brake sensor pin (component side) and ground on the highest resistance scale of the meter, while wiggling the electrical connector.
    6. If the meter shows anything but open circuit, install a new anti-lock brake sensor.
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