Mazda 323/626/929/GLC/MX-6/RX-7 1978-1989

Neutral Safety (Inhibitor) Switch

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REMOVAL & INSTALLATION



  1. Disconnect the linkage from the gear selector lever on the switch.
  2.  
  3. Unbolt and remove the switch from the transmission.
  4.  
  5. Place the new switch onto the transmission and bolt it in place.
  6.  
  7. Connect the selector lever linkage and adjust the switch.
  8.  

ADJUSTMENT



GLC

See Figure 1

  1. Adjust shift linkage as described earlier. Put the selector lever in the Neutral position (3rd detent from the rear).
  2.  
  3. Remove the transmission manual lever retaining nut and pull the lever off the switch.
  4.  
  5. Loosen (do not remove) the two switch retaining bolts and remove the alignment pin hole screw at the bottom of the switch.
  6.  



Click image to see an enlarged view

Fig. Fig. 1: Adjusting the GLC neutral safety switch

  1. Gently rotate the switch back and forth while attempting to insert a 0.08 in. (2mm) diameter pin into the alignment pin hole. When alignment is correct, the pin will slide through the hole in the internal rotor. Tighten the switch attaching bolts and remove the pin.
  2.  
  3. Reinstall the alignment pin hole screw. Position the manual lever back onto the switch shaft, then install the washer and nut.
  4.  
  5. Check switch operation. If the switch still does not work, i.e., the car starts in positions other than Park or Neutral, replace the switch. With the key in the ON (not START ) position, shift the selector into Reverse; the backup lights should be on. If not, check the bulbs and wiring or replace the inhibitor switch.
  6.  

626
  1. Place the transmission selector lever in the Neutral position.
  2.  
  3. Loosen the neutral switch attaching screws.
  4.  
  5. Position the manual shift lever shaft in the Neutral position by adjusting the range select lever. The proper Neutral position is where the slot of the manual shaft is positioned vertically and the detent position in the shaft engages correctly with a click sound.
  6.  
  7. Move the neutral switch so that the identification marks on the switch body and the sliding plate are aligned.
  8.  
  9. Tighten the neutral switch adjusting screws.
  10.  
  11. Check the adjustment by trying to start the engine in all gears. It should only start in Park and Neutral.
  12.  

929 and RX-7

See Figure 2

  1. Shift the selector lever to the Neutral position.
  2.  
  3. Raise and safely support the vehicle.
  4.  
  5. Loosen the inhibitor switch mounting bolts.
  6.  
  7. Unfasten the screw underneath the switch body.
  8.  
  9. Move the switch body so that the screw hole in the case aligns with the small hole inside the switch.
  10.  



Click image to see an enlarged view

Fig. Fig. 2: Inhibitor switch adjustment-929 and RX-7

  1. Check the alignment by inserting a 0.08 in. (2mm) diameter pin through the holes. Once the proper alignment is obtained, remove the pin and tighten the switch mounting bolts. Install and lightly tighten the screw.
  2.  
  3. Check the system for proper operation. If the switch still does not work (it still allows the car to start in positions other than Park or Neutral), replace the switch. With the key in the ON (not START ) position, shift the selector into Reverse; the backup lights should be on. If not, check the bulbs and wiring or replace the inhibitor switch.
  4.  

 
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