Unsafe: Kill switch in fuel or IGN circuit? (1 Viewer)

[bikemaniac]

Hi,

I would like to install a hidden kill switch in my gasoline Corolla from 1991. I like the thought that the thief can crank the engine but the car will not move. I see two options:

1. A hidden kill switch in series with the fuel pump. If the switch is ON, the fuel pump turns, othrwise not.
2. A hidden kill switch in series with the IGN circuit. The IGN circuit is very simple and basically controls the electronic fuel injection system.

In both cases the existing circuit is cut open and the switch is inserted in between.

Now, is this an unsafe procedure? I do realize, that if, for some reason, there is a fault in the switch or the connections I made, then the car will die even at speed. How would you assess the safety aspects of such a setup? And which of thd two is most preferable?

Lucas

 

[DanS HJ-45]

Absolutely no safety issue in my mind.

The worst thing that happens is you are driving, and the engine quits. No big deal, you just have to pull over to the side of the road.

I would have no preference between the two methods you propose.

Dan

 

[Mudder]

Is the car a manual? If so then go with the fuel pump. Other wise if someone wanted to steal it all they have to do is bump start it.

 

[bikemaniac]

Yes the car is manual. As for bump starting: That should be impossible. Absolutely no current enters the ECU when the IGN circuit is off and no fuel injectors get any signals....unless I interpret the circuit diagrams wrong .

Lucas

 

[toyotaspeed90]

Just interrupt the fuel pump circuit at the circuit opening relay, which is a small amperage wire and won't allow the car to run.

COR is located in the cab, under the shift cables a little behind the dash and below the center console.

This way if something fails in the system, you know that to can bypass it using the e1 and fp terminals of the diag port to get the pump running and the car home.

 

[Jeremy9A]

I would cut the fuel or even power to the ECU. You wouldn't want to accidentally flood it out if you ever forgot to hit the switch.

Things must be crazy over there in Denmark if thiefs are going after 91 Corollas

 

[hikermike]

When did corolla have a 4 wheeler? am I in the wrong forum? Let's have pix of it mudding or rock crawling!

 

[toyotaspeed90]

When did corolla have a 4 wheeler? am I in the wrong forum? Let's have pix of it mudding or rock crawling!

Starting in 1988.... the US had all wheel drive models of:

Celica (alltrac, 3sgte turbo, later called the GT4)

Corolla (alltrac wagon and alltrac sedan). The wagon is a weird one - in other parts of the world it was actually called a Carib, and aside from some similarities, many parts were not shared with the corolla.

Camry (alltrac wagon and alltrac sedan)

Then in the 90s there was the alltrac Previa... which was a newer version of the Hiace (Van) from the 80s...

The corolla and camry were only here for 1 generation (88-92 and 88-91) but we're continued on through the years elsewhere.

My 88 corlla alltrac wagon has a center locking diff as well... though the vsv's are dead....