Ford E6TZ-7A247-A Switch - Neutral Sensing

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To raise the vehicle and support it securely on jackstands. Check the manual shift linkage. Place the transmission in the Neutral position. Loosen the two MLPS retaining bolts. Using the MLPS adjusting tool, position MLPS and tighten the retaining bolts securely. Remove the jackstands and lower the vehicle.

The Neutral safety switch prevents the engine from starting when the vehicle is in gear. It's activated by the clutch pedal in manual transmissions and the shift selector lever in automatic transmissions. The switch can be found on the clutch pedal or clutch master cylinder actuator shaft for manual transmissions, and on the driver's side of the transmission. To check the switch, begin by disconnecting the electrical connector and checking for voltage while holding the key in the START position. If no voltage is indicated, repair the harness and check the starter. If voltage is indicated, jump between pins and check for voltage at the starter relay S wire. If voltage is now indicated, replace and adjust the switch.

With the automatic transmission linkage properly adjusted, loosen the two Neutral Safety Switch retaining bolts. Place the transmission selector lever in Neutral. Rotate the switch and insert a No. 43 drill bit (shank end) into the gauge pin holes of the switch. The drill shank must be inserted a full 31/64 inch through all three holes of the switch. Tighten the switch retaining bolts securely, then remove the drill bit from the switch. Check the operation of the switch. The back-up lights should come on only when the transmission is in Reverse and the engine should start only with the transmission lever in Park and Neutral.

The Transmission Range (TR) sensor is mounted on the automatic transmission and senses the position of the gear selector as chosen by the driver. The TR sensor contains a series of resistors and switch contacts. Depending on the gear selector position, the sensor contacts route current through different combinations of resistors and produce voltage signals of different levels. The sensor sends these signals to the PCM, which uses them for a number of engine and transmission control operations. The TR sensor input affects operation of the EGA system, idle speed control, and transaxle torque converter lockup. The sensor also takes the place of the neutral safety switch used on older automatic transmissions. If the gear selector is not in Park or Neutral, the TR sensor will not let the starter motor operate. The Electronic Engine Control (EEC) system can detect sensor problems and set trouble codes to indicate specific faults. For the check and replacement procedures.

For manual transmission early models, the switch can be located on the clutch pedal. Disconnect the electrical connector and check for voltage while holding the key in the START position. If no voltage is indicated, repair the harness and check the starter. If voltage is indicated, jumper between pins and check for voltage at the starter relay S wire. If voltage is now indicated, replace and adjust the switch.

Place the shift lever inside the vehicle in the NEUTRAL ("N") position. This is important for the proper alignment of the DTR sensor.

The first step is to disconnect the negative cable from the battery.

All manual transmission vehicles are equipped with a neutral sensing switch. The neutral sensing switch signals the vehicle on-board computer, which allows the vehicle to start only when the transmission is in N.

1. Disconnect the negative battery cable. 2. Raise and support the vehicle safely. 3. Disconnect the harness connector from the neutral start switch. 4. Clean the area around the switch. Remove the switch and O-ring using a thin wall socket (tool T74P-77247-A or equivalent).

The automatic transmission linkage should be properly adjusted.

Check that the engine will start only when the shift selector is in the Neutral or Park positions.