Neutral safety switch replacement

Tiny
CAROLYN GWIAZDZINSKI
  • MEMBER
  • 2010 SUBARU IMPREZA
  • 45,000 MILES
I need to have my Neutral Safety Switch replaced and brought it to the dealership where I bought my car.

They tried to replace it, however I was told that the part was completely rusted in place and couldn’t be replaced. So after hours of having my car, I told them to stop working on the car.

I asked them if there would be a problem driving the car, I was told no.

My husband went to pick up the car, and drove two miles to get back to our place. When he pulled into a spot to go into reverse, the car kept rolling forwards, my husband was finally able to get the car into the spot.

Talked to the service dept and they told him to do some things to tweak the car into gear, tried those things, only the car wouldn’t start.

Now we are being told it’s the shifter cable and that once the cable is replaced everything will work.

Is this true or do we still need to replace the NSS?
Friday, July 12th, 2019 AT 8:14 AM

10 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Welcome to 2CarPros.

I can't answer if the switch needs replaced because I'm not sure what was happening. However, if the vehicle keeps going forward when in reverse, they messed up the shift cable adjustment.

Not being sure what the original issue was, I will tell you that the neutral safety switch is adjustable. It simply may have needed adjusted to remedy the problem. Now, the shift cable will need adjusted too.

Here are the directions for adjustment in case you want to try it yourself. If once it is properly adjusted it still fails to operate, then the switch will need replaced. Picture 1 correlates with these directions. Also, the neutral safety switch is referred to as an Inhibitor Switch in the directions.

___________________________

INHIBITOR SWITCH
Inhibitor Switch

ADJUSTMENT
1) Set the select lever to "N" range.
2) Loosen the two bolts holding the inhibitor switch.
3) Insert the ST as vertical as possible into the holes of the shifter arm and switch body.
ST 499267300 STOPPER PIN

pic 1

4) T1ghten the two bolts holding the inhibitor switch.
Tightening torque:
5 Nm (0.5 kgf-m, 3.7 ft-lb)
5) Repeat the inspection of the inhibitor switch. If the inhibitor switch is determined to be "faulty", replace it.

++++++++++++++++++++++++++++++++++++++++++++++++

If the switch still doesn't work properly and needs replaced, here are the directions.

Inhibitor Switch

REMOVAL
1) Set the vehicle on a lift.
2) Set the select lever to "N" range.
3) Lift up the vehicle.
4) Remove the front and center exhaust pipes. (Non-turbo model)
5) Remove the center exhaust pipe. (Turbo model)
6) Remove the snap pin and washer from the shifter arm.

Pic 2

7) Remove the plate assembly from the transmission case.

Pic 3

8) Using the ST, remove the spring pin and remove the shifter arm.
ST 398791600 REMOVER

pic 4

9) Remove the two inhibitor switch securing bolts.

Pic 5

10) Remove the inhibitor switch from the transmission.

Pic 6

11) Disconnect the inhibitor switch harness connector from the inhibitor switch.

INSTALLATION
1) Connect the inhibitor switch harness connector to the inhibitor switch.
2) Install the inhibitor switch to the transmission case.

Pic 7

3) Install the shifter arm and fix with a new spring pin.

Pic 8

4) Move the shifter arm to the neutral position.
5) Using the ST, tighten the two bolts holding the inhibitor switch.
ST 499267300 STOPPER PIN

pic 9

6) Install the select cable to the shifter arm.
7) Install the plate assembly to the transmission.

Pic 10

8) Install the washer and snap pin to the shifter arm.

Pic 11

9) Install the front and center exhaust pipe. (Non-turbo model)
10) Install the center exhaust pipe. (Turbo model)
11) Lower the vehicle.
12) Check the inhibitor switch.

___________________________

Next, here is the adjustment procedure for the shift cable. Honestly, I feel they left this out of adjustment when it was returned and that's why you can't hit the right gears.

___________________________

SELECT CABLE
Select Cable

INSPECTION
Check the removed cable and replace or adjust if damaged, rusty or malfunctioning.
1) Check the cable for smooth operation.
2) Check the inner cable for damage and rust.
3) Check the outer cable for damage, bends and cracks.
4) Check the boot for damage, cracks and deterioration.
5) Move the select lever from "P" to "D" range. Check the existence of feel to contact the detents in each range. If the detents cannot be felt or the position pointer is improperly aligned, adjust the cable.
6) Check if the starter motor rotates when the select lever is set to "P" range.
7) Check the back-up light illumination when the select lever is in "R" range.
8) Check the parking lock operation when the select lever is in "P" range.

ADJUSTMENT
1) Set the vehicle on a lift.
2) Shift the select lever to "N" range.
3) Lift up the vehicle.
4) Remove the rear exhaust pipe.
5) Remove the heat shield cover.

Pic 12

6) Loosen the adjusting nuts on both sides.

Pic 13

7) Turn adjusting nut B until it lightly touches the connector.

Pic 14

8) Set a spanner wrench to adjusting nut B so that it does not rotate, and then tighten the adjusting nut A.

Pic 15

9) After the completion of adjustment, confirm that the select lever operates normally at all ranges.
10) Install in the reverse order of removal.

______________________________

If you were not having trouble shifting into the correct gear prior to the work, the cable is most likely not the problem but rather, it wasn't properly adjusted after they gave up on the switch.

Let me know if this helps or if you have other questions.

Take care,
Joe
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Friday, July 12th, 2019 AT 8:42 PM
Tiny
CAROLYN GWIAZDZINSKI
  • MEMBER
  • 6 POSTS
Thank you so much. Your information helped! The shifter cable needed to be replaced.
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Saturday, July 13th, 2019 AT 11:09 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Welcome back:

You are very welcome. Were you able to do it yourself?

Joe
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Saturday, July 13th, 2019 AT 7:30 PM
Tiny
CAROLYN GWIAZDZINSKI
  • MEMBER
  • 6 POSTS
Joe,

No, we actually had the mechanic at our dealership, where we bought the car do the work. I needed to check in with another opinion because for some bizarre reason, after years of buying our cars and using the same mechanic, the manager of the service department was not forthcoming with information and understanding that was needed and your reply came right after it was all figured out, so it helped tremendously.

Thank you,
Carolyn
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Saturday, July 13th, 2019 AT 9:02 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi Carolyn:

I'm glad it helped. If you ever have questions in the future, I hope you come back. Also, if you decide to do it yourself, I'll walk you through the process. You would be surprised how much you can save.

Take care of yourself and I'm glad the problem is fixed.

Joe
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Saturday, July 13th, 2019 AT 9:41 PM
Tiny
CAROLYN GWIAZDZINSKI
  • MEMBER
  • 6 POSTS
Hi Joe,
Is there anyway I can send you a little donation for your time and your advice? You have been very helpful and you have also replied to each email.

Thank you again for your assistance. You take care as well!
Carolyn
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Sunday, July 14th, 2019 AT 9:51 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Carolyn:

Thank you but you don't have to. I'm glad that I was here to help. If you want to do me a favor, just tell others about the site. And, make sure you come back when you have any questions.

You take care. Honestly, just from these few conversations, all I can say is I wish there were more people like you.

Take care,
Joe
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Sunday, July 14th, 2019 AT 7:44 PM
Tiny
CAROLYN GWIAZDZINSKI
  • MEMBER
  • 6 POSTS
Hi Joe,

Wishing there were more people like you as well, and sometimes I am lucky enough to come across them, and yes, I would be most happy to pass along your site.

It's been awesome connecting, thank you again!

Carolyn
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Monday, July 15th, 2019 AT 8:57 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
You're welcome and ditto.

Thanks,

Joe
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Monday, July 15th, 2019 AT 7:31 PM
Tiny
CAROLYN GWIAZDZINSKI
  • MEMBER
  • 6 POSTS
:)
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Monday, July 15th, 2019 AT 8:41 PM

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