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Old 11-14-2009, 12:34 AM   #1
bryan_johnson
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Default What does neutral position switch do?

I've got a VW vanagon that I fortified with a 2003 wrx engine several years ago. I never hooked up the neutral position switch. Its aways open. What is the purpose of this switch? Appearently not much, since I've been driving around with it unhooked for several years. Just curious.
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Old 11-14-2009, 03:29 AM   #2
Uncle Buck
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I'm assuming your talking about an auto tranny neutral safety switch. It disables the starter unless the transmission is in neutral or park.
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Old 11-14-2009, 09:04 AM   #3
bryan_johnson
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Appearently there is a switch on the manual trans car, too. Mine's a manual...

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Old 11-14-2009, 10:33 AM   #4
TheMadScientist
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One of the things it does on the manual trans is shut off the cruise control if you just pull the trans out of gear. I am pretty sure it would help determine injector cut off during in gear coasting.

Last edited by TheMadScientist; 11-14-2009 at 10:40 AM.
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Old 11-14-2009, 11:33 AM   #5
bryan_johnson
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I think I'll try to disconnect the connector on my MY02 wrx wagon today, and see what happens.
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Old 11-14-2009, 11:37 AM   #6
OneBadPig
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Quote:
Originally Posted by bryan_johnson View Post
I've got a VW vanagon that I fortified with a 2003 wrx engine several years ago .
I cant be the only one wanting to see pics of that
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Old 11-14-2009, 11:37 AM   #7
wrxkyle
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whatever the real reason it also aids in doing remote start alarms on manuals. is it a +12v or switched ground on the 02?
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Old 11-14-2009, 03:05 PM   #8
SDgoods
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the point of the switch on an automatic is so you can only start the car in park, and on a manual so you CANT start the car inless the clutch is pressed in (in other words if the car was in gear and u started it wuld lunge forward).. People disable this feature for remote starts on manual cars... you just always have to leave it in neutral
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Old 11-14-2009, 03:09 PM   #9
4banger4dr
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all i know is, i'm going to be hooking one up eventually so i can use launch control and flat foot shifting haha

*edit sorry if i read it wrong i thought you had a 5sp

Last edited by 4banger4dr; 11-14-2009 at 03:14 PM.
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Old 11-14-2009, 03:30 PM   #10
JSarv
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Quote:
Originally Posted by SDgoods View Post
the point of the switch on an automatic is so you can only start the car in park, and on a manual so you CANT start the car inless the clutch is pressed in (in other words if the car was in gear and u started it wuld lunge forward).. People disable this feature for remote starts on manual cars... you just always have to leave it in neutral
That would be clutch switch on a manual.. not neutral position... NPS does nothing for starting.

It does several things depending on the model though. Disables cruise control as mentioned before. Determines current gear through the ecu. On 2.0 (JDM) sti models if it is not functioning properly it will disable AVCS and Per Gear boost/wastegate features in certain models.



-Jerod
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Old 11-14-2009, 04:32 PM   #11
SDgoods
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Quote:
Originally Posted by JSarv View Post
That would be clutch switch on a manual.. not neutral position... NPS does nothing for starting.

It does several things depending on the model though. Disables cruise control as mentioned before. Determines current gear through the ecu. On 2.0 (JDM) sti models if it is not functioning properly it will disable AVCS and Per Gear boost/wastegate features in certain models.



-Jerod
Ah damn your right i just noticed that, for some reason before i read neutral safety switch...
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Old 11-14-2009, 05:03 PM   #12
mattminer
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its part of the idle control routine. if you need more info feel free to pm me.

M@
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