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    Mitsubishi Pick-ups and Montero 1983-1995 Repair Guide

    Park/Neutral Position (Inhibitor) Switch

    Print

    The inhibitor switch on the Mitsubishi trucks and Monteros also houses the back up light switch.

    REMOVAL & INSTALLATION



    1983-86 Pick-Ups and Monteros
    1. Disconnect the negative battery cable from the battery.
    2.  
    3. While pushing the button, remove the selector handle assembly from the selector lever by loosening the set screw.
    4.  
    5. Remove the console box, then remove the position indicator assembly upward by loosening the attaching screws.
    6.  
    7. Disconnect the inhibitor (park/neutral switch) switch wiring.
    8.  
    9. Loosen and remove the attaching screws of the inhibitor switch. Remove the switch from the selector assembly.
    10.  

    To install:
    1. Loosely secure the inhibitor switch to the selector assembly.
    2.  
    3. Connect the inhibitor switch wiring.
    4.  
    5. Adjust the inhibitor switch-refer to the following procedures for adjustment.
    6.  
    7. Set the position indicator back in place, then secure it in place with the mounting screws.
    8.  
    9. Install the console box.
    10.  
    11. Mount the selector handle to the lever and secure in place by tightening the set screw.
    12.  

    1987-89 Pick-Ups and Monteros
    1. Disconnect the negative battery cable from the battery.
    2.  
    3. Remove the floor console, the selector handle and the indicator panel-refer to the shift linkage removal procedures in this section.
    4.  
    5. Unplug the inhibitor switch (park/neutral switch) harness connector.
    6.  
    7. Unscrew the retaining screws and remove the inhibitor switch from the bracket.
    8.  

    To install:
    1. Loosely attach the inhibitor switch to the bracket.
    2.  
    3. Adjust the switch-refer to the adjustment procedures.
    4.  
    5. Reassemble the shifter assembly.
    6.  
    7. Connect the negative battery cable to the battery.
    8.  

    1990-95 Pick-Ups

    See Figure 1

    1. To test the switch, remove the wiring connector from the switch and test for continuity between the center pin of the switch and the transmission case. Continuity should only exist when the transmission is in Park or Neutral.
    2.  
    3. Check the gearshift linkage adjustment before replacing a switch which tests bad.
    4.  
    5. Unscrew the switch from the transmission case and allow the fluid to drain into a container. Move the selector lever to the Park and then to Neutral positions, and inspect to see that the switch operating lever fingers are centered in the switch opening in the case.
    6.  



    Click image to see an enlarged view

    Fig. Fig. 1: Unscrew the park/neutral switch from the transmission case and drain the fluid into a container-R4AC1 transmissions

    To install:
    1. Screw the switch and new seal into the transmission case and tighten to 25 ft. lbs. (34 Nm). Retest the switch with the test lamp or ohmmeter.
    2.  
    3. Add automatic transmission fluid to the transmission to bring it up to the proper level.
    4.  
    5. The back up lamp switch circuit is through the two outside terminals of the 3 terminal switch.
    6.  
    7. To test the back up switch, remove the wiring from the switch and test for continuity between the two outside pins.
    8.  
    9. Continuity should exist only with the transmission in reverse.
    10.  
    11. No continuity should exist from either pin to the case.
    12.  

    1990-95 Monteros
    1. Disconnect the negative battery cable from the battery.
    2.  
    3. Raise the vehicle and support it safely on jackstands. Block the wheels with wheel chocks and apply the parking brake.
    4.  
    5. Set the selector lever in the Neutral position.
    6.  
    7. Disconnect the transmission end of the selector control cable from the park/ neutral switch.
    8.  
    9. Unplug the park/neutral switch harness connector.
    10.  
    11. Remove the mounting bolt and remove the switch from the transmission.
    12.  

    To install:
    1. Loosely mount the switch with the mounting bolt.
    2.  
    3. Adjust the switch using the following procedures for adjustment.
    4.  
    5. Hook up the harness wiring.
    6.  
    7. Lower the vehicle to the ground. Set the selector lever in the Park position, then remove the wheel chocks.
    8.  
    9. Connect the negative battery cable, if not done already.
    10.  

    ADJUSTMENT




    WARNING
    If the switch is faulty, the engine may start with the vehicle "in gear". If this happens the vehicle will accelerate when the engine starts. Keep the brakes on and be ready to switch the key off instantly.

    1983-86 Pick-Ups and Monteros

    See Figures 2 and 3

    1. Place the selector lever so that it is in the N position, then temporarily fasten the inhibitor switch (park/neutral switch) to the selector lever bracket. By using an ohmmeter, measure the continuity between the switch terminals BY and BY; move the switch forward and backward, and set it to the position of first continuity (where it first shows continuity).
    2.  
    3. Slide the inhibitor switch (park/neutral switch) so that there is 0.06 in. (1.5mm) clearance between the switch and the shifter lever.
    4.  
    5. Tighten the two attaching screws until snug.
    6.  



    Click image to see an enlarged view

    Fig. Fig. 2: Set the selector lever in the position shown, then adjust the switch so that it shows continuity-MA 904A transmissions



    Click image to see an enlarged view

    Fig. Fig. 3: Slide the switch sideways until the proper clearance of 1.5mm (0.06 in.) exists-MA 904A transmissions

    1987-89 Pick-Ups (4WD) and Monteros

    See Figures 4, 5 and 6

    1. Make sure the harness connector is securely attached.
    2.  
    3. Loosen the mounting screws.
    4.  
    5. Set the shift lever so that the pin at the end of the rod is at the neutral position-see the illustration.
    6.  
    7. Using a circuit tester between terminals 2-BY and 2-BY of the inhibitor switch connector, check the continuity when the inhibitor switch is moved back and forth, and mark the bracket.
    8.  
    9. Tighten the inhibitor switch mounting screws so that the switch edge is 0.1 in. (2.5mm) from the close edge of the lever.
    10.  



    Click image to see an enlarged view

    Fig. Fig. 4: To adjust the park/neutral switch, move the selector lever until the selector rod is in the position shown-KM 148 transmissions



    Click image to see an enlarged view

    Fig. Fig. 5: Once the selector lever is in the correct position, use an ohmmeter to set the park/neutral switch-KM 148 transmissions



    Click image to see an enlarged view

    Fig. Fig. 6: Move the park/neutral switch to the side until the correct clearance has been reached-KM 148 transmissions

    1990-95 Monteros

    See Figures 7 and 8

    1. Move the transmission selector lever to the N position.
    2.  
    3. Loosen the adjusting nut of the control cable located on the left side of the transmission.
    4.  
    5. Loosen the park/neutral position switch mounting bolt.
    6.  
    7. Adjust by turning the park/neutral position switch so that the bosses for aligning the N position on the park/neutral position switch are aligned with the N position adjustment lever.
    8.  
    9. Tighten the park/neutral position switch mounting bolt to 4 ft. lbs. (6 Nm).
    10.  
    11. Gently pull the end of the transmission control cable in the direction of the arrow and tighten the adjusting nut to 17 ft. lbs. (24 Nm).
    12.  
    13. Check that the selector lever to the N position.
    14.  
    15. Check that the range on the transmission side operates and functions correctly for each position of the selector lever.
    16.  



    Click image to see an enlarged view

    Fig. Fig. 7: Position the adjustment lever until it is aligned with the two N position aligning bosses-V4AW2 (V4AW3) transmissions



    Click image to see an enlarged view

    Fig. Fig. 8: When adjustments have been made, tighten the adjusting nut to 17 ft. lbs. (24 Nm) -V4AW2 (V4AW3) transmissions

    CONTROL CABLE CHECK

    It is possible to confirm whether the control cable is properly adjusted by checking whether the park/neutral position switch is performing well.

    1. Apply the parking and service brakes fully.
    2.  
    3. Set the selector lever to the R position.
    4.  
    5. Turn the ignition key to the START position.
    6.  
    7. Slowly move the selector lever upward until it clicks as it fits into the notch of the P position. If the starter motor operates when the lever makes a click, the P position is correct.
    8.  
    9. Then slowly move the selector lever to the N position by the same procedure as in the preceding paragraph. If the starter motor operates when the selector lever is at the N position, then the N position is correct.
    10.  
    11. Also check that the vehicle does not begin to move and the lever does not stop between P-R-N-D.
    12.  
    13. The control cable is properly adjusted if, as described previously, the starter motor starts in both the P range and the N range.
    14.  

     
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