Possible to start engine without depressing on clutch??

ChrisSlicks · 11-08-2010, 08:11 AM

Quote:

Originally Posted by ykz

just did this on my car. Installing relay provisions for my remote start i ordered. I used two relays as there are actually two switches on the clutch pedal.

Relay#1 - to open the circuit for clutch pedal position switch coming out of pin 99 at the BCM (a 12V input is normally found on this pin at rest which must be interupted to allow a start)

Relay#2 - to apply 12v to the clutch interlock switch circuit at pin 114 of the BCM. (this pin has 0Volts at rest and requires 12v to allow a start)

Following that just apply a ground pulse to the start button circuit at pin 89 on the BCM and voila, your car starts with no clutch, no push button.

I will be using a proximity key bypass module that powers up the key fob only for the start of the car then powers it off once started. That way the key fob is dead after the car is started and you cannot walkup to the car and unlock the doors with the door unlock request button.

Nice job.

How much did the proximity key module end up costing you?
Is it a regular fob that you removed the battery from or something else?
Did you do anything for neutral detection?

ykz · 11-09-2010, 08:13 PM

The bypass module cost $40. Its the type that you remove the battery from the fob and it powers the fob up through its own wiring. I have done anything for the neutral switch yet....still trying to think up something safe/creative.

ChrisSlicks · 11-09-2010, 09:13 PM

In the transmission section of the manual it mentions a park/neutral switch connector for the 6MT for vehicles with and without S-mode so that might be something you can tap into. See page TM-44 for the exploded view (item 6).

In the BCM section of the manual it is referred to as the "SFT PN/N SW". It appears to connect to pin 140 and is at 12V (battery voltage) when in neutral and 0V when in gear. See BCS-68.

ykz · 11-10-2010, 02:43 PM

Thats great. Just might work but i gotta check my car first and see if its actually there. Unfortunately my car does not have S-mode. The service manual says the switch is there s-mode or not, but the BCM section says pin 140 is only used if you have an A/T or an M/T with S-mode and nothing on M/T non S-mode. Even if its not, its the same transmission case nearest i can tell and the neutral switch and plunger only come out to $20. Not sure how i missed this but thanks for pointing me in that direction! I naturally assumed there would be no neutral switch.

ChrisSlicks · 11-10-2010, 03:54 PM

The transmission manual indicates the neutral switch is there for both with and without S-mode but the BCM manual indicates it is only present if you have S-mode. Either one of these 2 manuals is wrong or there is a wire going nowhere. Hope you can figure out a solution.

ImportConvert · 11-10-2010, 06:49 PM

Quote:

Originally Posted by Triple's

Yes, bypass the safety feature!
Not recommended!

I agree. I still remember that video of that kid ramming his Dad's classic mustang through the garage door.

ykz · 11-11-2010, 11:14 AM

Quote:

Originally Posted by ChrisSlicks

The transmission manual indicates the neutral switch is there for both with and without S-mode but the BCM manual indicates it is only present if you have S-mode. Either one of these 2 manuals is wrong or there is a wire going nowhere. Hope you can figure out a solution.

So i put the car up on the lift last night. The switch is there. Anytime the ignition is on, 12v is sent to one side of the switch, in any position of the neutral gate the switch is closed and it does in fact send 12v to pin 140 of the BCM but also branches off and sends 12v to pin 109 of the ECM. Ovolts are seen in any gear. Should be easy to tap into.

ChrisSlicks · 11-11-2010, 11:47 AM

Quote:

Originally Posted by ykz

So i put the car up on the lift last night. The switch is there. Anytime the ignition is on, 12v is sent to one side of the switch, in any position of the neutral gate the switch is closed and it does in fact send 12v to pin 140 of the BCM but also branches off and sends 12v to pin 109 of the ECM. Ovolts are seen in any gear. Should be easy to tap into.

Very nice. Those doing remote starters on the 6MT will find this very useful. +Rep.

sonic370 · 11-11-2010, 08:01 PM

Quote:

Originally Posted by ChrisSlicks

That's the best way.

You don't want to bypass the clutch sensor especially if you have SRM. If you are doing it because of a remote starter then you can usually set it up to send a temporary signal which you would achieve by shunting pin 99 of the BCM to ground. Figuring out how to detect neutral (if you have SRM) would also be a really good idea to prevent you sending the Z through the garage door.

sonic370 · 11-11-2010, 08:05 PM

i'm still trying to figure out how to reset the oil and filter warning change notice cluster...................

ChrisSlicks · 11-12-2010, 08:42 AM

Quote:

Originally Posted by sonic370

i'm still trying to figure out how to reset the oil and filter warning change notice cluster...................

TongMan · 11-12-2010, 09:06 AM

After thinking about bypassing the clutch pedal, I've come to realize that it would be absurd to bypass it. Bypassing the clutch would mean that the driver can start the car by a push of the start/stop button. But, that would mean that it would be impossible to go into ACC mode and ON mode. So, in summary, DO NOT bypass the clutch in your 370z.

ykz · 11-13-2010, 05:34 PM

Quote:

Originally Posted by TongMan

After thinking about bypassing the clutch pedal, I've come to realize that it would be absurd to bypass it. Bypassing the clutch would mean that the driver can start the car by a push of the start/stop button. But, that would mean that it would be impossible to go into ACC mode and ON mode. So, in summary, DO NOT bypass the clutch in your 370z.

To completely bypass it would be not so smart not to mention the fact that all switches are monitored by the BCM and ECM. As soon as the car moves above 40kmh for a certain duration and does not see the switch positions changing(ie shifting gears) the car starts to throw codes. Its all in the service manual.

Yet i think you might have missed the part where i said i was installing a remote start on my 6MT. That being said i am not "bypassing" the clutch switches(you cant without getting codes nonstop) the remote start will send out a signal to a pair of relays to "simulate" the clutch being pressed, and only for the duration of the start cycle. Once the car is up and running the relays go back to normal and all functions as per normal. interfacing with the push button, interlock switch, pedal position switch, as well as neutral switch takes a series of 5 relays. all non functioning when the remote start is not entering the start sequence. You can still use ACC and ON mode in my car. I may post my relay wiring diagram at a later date once i get everything finished up.

cheers

tvfreakazoid · 11-15-2010, 05:04 AM

I read in a paper column that modern cars you dont' have to "warm" them up because they are fuel injected. Not sure what exactly that means but that's what i've read.

ChrisSlicks · 11-15-2010, 08:09 AM

Quote:

Originally Posted by tvfreakazoid

I read in a paper column that modern cars you dont' have to "warm" them up because they are fuel injected. Not sure what exactly that means but that's what i've read.

The engine doesn't need to be warmed up before normal driving but it sure helps when your trying to get a sheet of ice off the windshield. I have remote start in all my Winter vehicles.

11-09-2010, 09:13 PM	#18 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	In the transmission section of the manual it mentions a park/neutral switch connector for the 6MT for vehicles with and without S-mode so that might be something you can tap into. See page TM-44 for the exploded view (item 6). In the BCM section of the manual it is referred to as the "SFT PN/N SW". It appears to connect to pin 140 and is at 12V (battery voltage) when in neutral and 0V when in gear. See BCS-68. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

11-10-2010, 03:54 PM	#20 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	The transmission manual indicates the neutral switch is there for both with and without S-mode but the BCM manual indicates it is only present if you have S-mode. Either one of these 2 manuals is wrong or there is a wire going nowhere. Hope you can figure out a solution. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

11-15-2010, 05:04 AM	#29 (permalink)
tvfreakazoid A True Z Fanatic Join Date: Jan 2009 Location: kommie kali Posts: 1,238 Drives: 2015 Audi S5; 6spd. Rep Power: 10324	I read in a paper column that modern cars you dont' have to "warm" them up because they are fuel injected. Not sure what exactly that means but that's what i've read. __________________ Mudders milk

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11-09-2010, 08:13 PM	#17 (permalink)
ykz Base Member Join Date: Nov 2010 Location: Yellowknife Posts: 9 Drives: 09 370z PG M6 Rep Power: 15	The bypass module cost $40. Its the type that you remove the battery from the fob and it powers the fob up through its own wiring. I have done anything for the neutral switch yet....still trying to think up something safe/creative.

11-10-2010, 02:43 PM	#19 (permalink)
ykz Base Member Join Date: Nov 2010 Location: Yellowknife Posts: 9 Drives: 09 370z PG M6 Rep Power: 15	Thats great. Just might work but i gotta check my car first and see if its actually there. Unfortunately my car does not have S-mode. The service manual says the switch is there s-mode or not, but the BCM section says pin 140 is only used if you have an A/T or an M/T with S-mode and nothing on M/T non S-mode. Even if its not, its the same transmission case nearest i can tell and the neutral switch and plunger only come out to $20. Not sure how i missed this but thanks for pointing me in that direction! I naturally assumed there would be no neutral switch.

11-11-2010, 08:05 PM	#25 (permalink)
sonic370 A True Z Fanatic Join Date: May 2010 Location: Orange Texas Posts: 1,574 Drives: 09 370Z Sports PGK Rep Power: 18	i'm still trying to figure out how to reset the oil and filter warning change notice cluster...................

11-12-2010, 09:06 AM	#27 (permalink)
TongMan A True Z Fanatic Join Date: Feb 2010 Location: NorCal Posts: 1,297 Drives: 2013 Nissan GTR Rep Power: 715	After thinking about bypassing the clutch pedal, I've come to realize that it would be absurd to bypass it. Bypassing the clutch would mean that the driver can start the car by a push of the start/stop button. But, that would mean that it would be impossible to go into ACC mode and ON mode. So, in summary, DO NOT bypass the clutch in your 370z.