Genuine Ford Explorer Sport Trac Vehicle Speed Sensor

Ford Explorer Sport Trac Vehicle Speed Sensor Parts Questions & Experts Answers

• Sensor Assy - Engine Speed
  F7RZ-7H103-BA
  Q: How to check and replace the Vehicle Speed Sensor on Ford Explorer Sport Trac?

  A:

  Before starting your repairs, check the wiring from 2000 models onwards if sensor testing and the engine control unit show the sensors working fine but the driveability problems remain. If your first checks don't fix a problem, ask for help from your dealer's service department or a professional vehicle repair center. Located on the transmission and controlling the speed sensor, the sensor known as VSS produces AC voltage waves, similar to a sine wave, to show how fast the car is moving. An additional sensor at the differential top also helps make this happen. The PCM uses this input to control different engine and transmission functions, and provides power for your car's speedometer reading. The VSS sensor has two problems: it can keep the car from performing well, and when EEC sees the sensor isn't working, it sends codes to troubleshoot. To test the VSS sensor, unplug the connector, start the car with the ignition on, and measure between the sensor connector and ground. Normal reading should be 1.5 volts. When you spin the gear on the sensor and it doesn't pick up voltage, then the sensor needs to be replaced. Before you can fix the sensor, lift your vehicle high enough so there's no dangerous drop, detach the electrical wire from the VSS, remove the clamp and bolt holding it in place, and carefully pull the VSS out of the transmission. Measure the O-ring and get a new one to place inside of the sensor if the old ring looks damaged. You put the sensor back into place just the opposite way you took it out.