I have a 5 speed manual, the sensors on the rear drivers side are a bit of a puzzle, in particular the one at the rear & high up, from the manual it looks like its the neutral switch, at some stage this has been disconnected at the plug, I cannot for the life of me find another harness anywhere where it should plug into, the sensor below and just forward of it has had a new pair of wires run down to it from up the firewall somewhere, I guess the questions are a. where would the original harness run from? & b. what effect will not having the neutral switch in the system have on the car?
ground it in the engine bay you have 2 cut the yellow with blue wire, insulate the end closest 2 the battery and ground the other end of the wire that goes into the connector.. check with datascan and your neutral switch should now be off..
My trans is out at the moment. Could I just ground the connector wire on the trans or does it have to be done at the engine bay end? Was thinking for ease just cut the wire at the sensor (so I'm sure to get the right wire) ground that correct wire by sandwiching it between the sensor and the trans body.
you ground the wire in the engine bay as it effects the ecu . i have a auto harness on mine so it was never connected. if its not connected the ecu always thinks its in neutral and pushes the timing to 25 !!
Would I be right in thinking that this is why my idle always seems to be all over the place?, e.g. when I pull up at the lights it and I have the clutch in it goes to 1500 then slowly settles down to 800 ish,
could be man, hunting that much usually has something to do with where you have your base idle set tho
Neutral switch again OK guy's an update and a call for help, I have figured out that half of my idle issue was a bad temp sensor connection, I have managed to pick up an old conzult cable and my timing is rock steady on 20 deg, so what I am thinking is that because my neutral switch has been disconnected it does not adjust timing at all (Me being an old style non professional part time mechanic) at least that is what I have come up with, now it seems from what I have read ,I have two options,either reconnect the neutral switch OR short out the wiring at the other end, now my problem is exactly where I do I physically find the wiring, can anybody point me in the right direction? I forgot to mention I am also thinking that this is also causing my speed sensitive steering to not work, If I am reading right when the ECU does not pick up the switch signal after 10 seconds it will turn the steering onto the hard setting,so another question is , if I do manage to short out the wires what effect will that have on the steering?
20 is not neutral switch, it's something else that I can never remember... tps according to this https://z32.wikispaces.com/Ignition+Timing (near the bottom) Info on testing and setting the tps is here https://z32.wikispaces.com/Throttle+Position+Sensor Could also be the temp sensor if you haven't fixed that yet.
pin 44 is at/mt neutral - linky. While we are on this topic my car is a TT manual conversion. Currently the neutral switch is not connected to anything and my idle sits at 25 deg on the timing light. I'd like to put the neutral switch to use. If I were to connect pin 44 to one wire on the neutral switch and earth the second wire on the neutral switch, would this be a workable solution? I'm not an auto elec but in theory I think this might work.
In the middle of my conversion right now That is exactly what I intend to do Cannot see why this would not work.............. Bit confusing on the manual switch from some of the posts - my understanding here is that: The auto neutral switch affects timing to allow for the differences of pushing extra toque to maintain idle in drive as opposed to idle out of gear ( timing changes 25 to 15 degrees) The manual neutral switch does not affect timing but possibly prevents you from starting in gear with clutch out and is probably why some people state they cannot start the car when this is disconnected ?????? I am only assuming this, because I cannot see why the engine timing would change on a manual box in gear or out of gear......... and the switch is only either on or off on both types Is this right or wrong..............? JC :zlove:
I am also led to believe that if you have nistune - you can change the timing settings to 15 degrees and hence the neutral switch becomes somewhat irrelevant if you do it that way......(circuit can be left open altogether or remain connected) Is this right or wrong................
Other uses for Neutral switch on MT I've not seen anyone mention this before so thought I would mention it; Since I've not personally analysed the code in the stock ECU I can't confirm however I would highly suspect that the ECU uses the neutral switch to determine when to go in to closed loop idle control (even on a MT). With the neutral switch closed, the ECU knows for sure that the car isn't being driven and it should be controlling the idle appropriately. On the aftermarket ECU I use (Adaptronic) the neutral/clutch switch is the preferred method to use to trigger this condition. I know my neutral switch wasn't working properly and sometimes the car would stall when pulling up to a stop in neutral. I believe this to be related to the lack of the neutral switch as it also does it with the aftermarket ECU without the neutral switch trigger enabled. ltd
