best way to disable the car electronically

[Texx]

I've just checked a 2 plug GT ECU I have here and there are definitely +B and +B1 terminals in the 16P connector, both terminals have continuity inside the ECU so +12v would only need to be applied to one of the two terminals to keep the ECU alive. However, like I said before there is no +B1 terminal shown on the wiring diagram for the EP91 4E-FTE and as you say there is no pin 1 in the 12P connector, so I'm a little bemused as to why the engine did not stall when you cut the +12v at pin 7 of the 12P connector. If you definitely did cut the correct wire to pin 7 then there must be another +12v feed into the 3 plug ECU that is keeping it alive.

Have a check for continuity between pin 7 of the ECU terminals and the other 11 pins, do this at the ECU with the connector removed. If you get continuity between pin 7 and another pin other than pin 1 you'll need to identify what that pin is and what is feeding it.

 

[dark_knight]

kill switch

thanks Texx but i decided not to go to all this trouble as i already traced the ECU relay coil-side trigger and considering using it as one of the kill-switches. will find a NC relay to use as a fail-safe on the line so that i can remote-trigger a shut-down but should that fail then the car is still useable..
thanks for all the feedback. i tried repping you but the system says i need to spread some before you can have some.. :/

 

[accent_97]

if it was me i will empty the tank , if the car is set up for very long time (4years to 10 years) petrol will go yellowish and may have problems in the pipes blocked etc

 

[dark_knight]

accent_97, not looking at storing the car for an extended period of time, but thanks for the input..