The Rig

iTrader: (13)

Age old question, what does it do ?

Now before you say the classics dont have one, they do, well, they have 2 switches, one for the reverse lights, other for, neautral switch, apparantly .

But what does it do on a classic, they have no clutch pedal safety switches and i also read the neautral switch stops the starter operating if in gear. well, i can start my WRX in gear, does that mean the switch is faulty ?

questions questions..................

The Rig

iTrader: (13)

Bottom right, you see the 2 switches , black heads on them

LegacySTi

iTrader: (13)

?

Ones a neutral position switch. And ones a reverse light switch.

What is the question?

The Rig

iTrader: (13)

The question is, on a classic, what is the function of a neutral Position switch, what does it do, if you unplug it, nothing changes, car drives the same, so my question is , what does it do ?

Don Clark

Like any Subaru Neutral Position switch (Classic, Newage 5MT or 6MT) it's linked into the Fuel Injection System part of the ECU and is used mainly for making adjustments at idle (when car is usually in neutral)

Linked in for

Ignition system control


Idle air control

ossett2k2

iTrader: (9)

Interesting and nice info Don Clark.
My data shows the cars ignition to be @10* BTDC on start up but I'm pretty sure my NPS has been disconnected,so there will never be any compensation on startup.
My car is a GC8 but had a 6 speed gearbox conversion.
Would this mean there would be no way to connect my NPS from the 6 speed to my ECU or would a 5 speed NPS work on a 6 speed box?

AS Performance

iTrader: (4)

@TheRig the starter lock out is purely a JDM clutch switch thing and nothing to do with the NPS

as above its use is mainly for idle and simply so the car understands when its moving in gear.......

@ossett2k2 you simply use the correct gearbox loom to suit your CHASSIS and it will plug into the 6spd sensors

ossett2k2

iTrader: (9)

Thanks @ @AS Performance I will look into sorting a loom(if there's not one there) I have seen a few plugs on the box when I've been under the car,one was a bigish grey plug which was disconnected.
I'm not even sure what gearbox I have to be honest,the long sticker is missing and just a short 6 digit(from memory) sticker on there,I'm pretty sure it's a JDM 6 speed as the ratios are very short.
Would you know if the sensors and loom are the same for all 6 speed boxes,JDM & UK,bug & blob etc?

AS Performance

iTrader: (4)

as previously stated it the 5spd gearbox loom to suit your CHASSIS not the 6spd gearbox loom.......

The Rig

iTrader: (13)

Ok cheers guys for the info, it doesnt help when you read these descriptions, confuses things some what !

http://shop.grahamgoode.com/subaru-i...81-72179-p.asp




"An important car electrical component is the neutral safety switch. This switch disables the starter operation when the vehicles transmission is not in neutral or park. "




cheers

ossett2k2

iTrader: (9)

Ah get ya,nice one
So unless my loom has been removed then I should be able to plug my existing loom straight into the 6 speed box.

LegacySTi

iTrader: (13)

Thats auto box

johned

So on a manual car it tells the ecu that the car is out of gear and so not being driven in gear.

jonnyricer2

iTrader: (9)

Is the Nps switch the reason why when rolling in neutral the engine revs rise ??