2012 camry fuel circuit

I am about to install a fuel cutoff switch on my new camry. I have the wiring for the fuel circuit. I would like to put the switch in the front seat area of the vehicle so I dont want to break the circuit under the back seat. The wiring is pretty hard to get at. The connector involved is in the left upper dash underside. Does anyone have a better idea for imobilization besides the ignition circuit? Has any one done this before. Honda was easy but the Camry looks challanging.

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EEMan

I usually short the ignitor output to ground since that involves adding and not cutting or intercepting.
Where coil packs are involved, usually the timing sensor can be shorted.   

To interrupt a fuel circuit requires interception which can be a problem later - ie, intermittent circuit loss (the worst kind) and hence injector or engine damage on EFIs.    


Other critical EMS sensors can also be shorted. Often some are switched to GND.

What would be a specific alternative to a fuel circuit switch.  Do you know anything such as what sensor and wire color. i would like to do it under the dash but maybe I will have to do it under the hood.

Thanks

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EEMan

No.

I only know generically that many sensors are usually GND referenced or switched else can use SPST relay contacts to short them out (or 30 & 87a for SPDT contacts if you want to energise the relay to enable driving, as opposed to having the SPST relay deenegised (and flatten the battery) to otherwise disable whatever).   
And some of those sensors are critical for engine starting else running - eg, cam position sensors (for spark rather than injection - injection can occur at any time; that's often used for starting and limp-home modes, eg, a squirt every 10mSecs etc).


The advantage of the above approach(es) is that is does NOT involve cutting nor the inclusion of switching that could be hazardous if the circuit breaks unintentionally.
(Though if using SPDT relay's to pull off the short (87a), the relay could de-enegise given a fault situation ...)

And if the "added parallel" wiring or relay fails and causes stoppage, simply remove it or disconnect one wire.

I don't mind cutting and soldering. But I would like to get something under the dash beside the ignition. If you could provide a wire/sensor that could kill the engine that would be a great help. I dont have the wiring for everything, just the fuel circuit and that is hard to get at .

Thanks

steve

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EEMan

If the vehicle has a factory RFI immobiliser, it's all rather moot.
Short of a criminal stores manager there's no way to steal your vehicle without a low loader and breaking it down for parts.
Which is why if no factory alarm then fit a good alarm to prevent it.
Breaking anything but the starter circuit on a modern vehicle is a real no-no as far as safety is concerned

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Thank you sir,
I did not know that. Are you saying that the average thief cannot bypass the immobilizer and get the car started without special equipment? If that is true then I may be wasting my time. I was under the impression that a fuel cutoff switch was a great idea. Maybe that "old-school" thinking.
What is a "low loader"?

Thanks again
Steve

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EEMan

With regards to modern vehicles, the only true part of "Gone in 60 seconds" was the stores manager in league with the car thieves!
With the exception of some "Keyless-Go" (proximity, unlock as you approach, starts with your foot on brake and press button, key in pocket), when some people have extremely sophisticated RFI decryption programs, and that may be an urban myth, a modern car is virtually impossible to steal by driving it away.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

2012 camry is eiehter 80bit or newer. no point in doing fuel cut off, as thats what the immobilizer already does. howie had the answer.

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert