Ignition motor still running, key is out of igniton, will not turn off. stopped engine by using kill switch,but the igniton is still on, had to disconnect battery

I obviously am not familiar with the application here but petrol engines have an electrical ignition system that can simply be turned off to stop the engine. However diesels have super high compression that causes the ignition. Diesels with mechanical fuel systems will continue running until the fuel is shut off or the engine is stalled. The fuel is usually supplied to the injector pump through a solonoid valve where an electrical supply is needed to open the valve and the valve springs shut when the supply is removed. The fault is 90% in my mind associated with the this fuel shut off valve. However there is another way that a diesel engine can find fuel to not allow it to stop. A turbo seal failure can atomise engine oil into the inlet manifold and the engine will continue running until all the is used up.

The starter motor usually has two voltage circuits, one comes from the battery, hot all the time. The other circuit goes hot with key in the crank position and is wired through the neutral or clutch switch, depending on the tranny. When you turn off the key, it kills ignition switch feed to engine components, so, yes it will kill it.
The starter motor usually grounds through the engine block.
I can't post wiring diagram because I don't know year--make--model. My database only covers vehicles sold in the US.

nevr take it to a dealer--their equipment goes only 5yrs bac and help is not experienced--go to independent with reputation----car needs pro inspection-has worn parts and bad maintenance--their are repair books in library or online--------go to magicmechanic and send him problem-hes expert on any model n yr

Check starter solinoid

Your Sonata is equipped with a "Keyless Entry & Burglar Alarm" system. When the Burglar Alarm is activated, it KILLS the starting system through the used of a relay called the "Burglar Alarm Relay". This mode prevents engine starting with the key.
Solution #1
Disarm the system with the Keyless Remote (key fob) If you don't have this remote (or its battery is dead) replace the battery & try disarming again.
Solution #2
Enter the vehicle & insert the key in the ignition and turn the ignition switch to 'RUN'. Wait 3 to 5 minutes until the alarm stops. You should then be able to start the engine.

Have a qualified/certified Hyundai Service Technician properly diagnose this issue.

your igniton key cylinder is worn or broken or need new parts and check ignition switch also does this have tilt steering could be a bent rod connects igniton switch to ignition key clyinder (where you put your key in and turn)hope this helps

There is NO kill switch on the 2000 Elantra... HOWEVER, there is a thing called the Key Fob (keyless remote entry system). There is, however, a system in place called the 'starter kill' circuit and it is activated when the burglar alarm goes off.... it's called the burglar alarm relay and it is activated to prevent the engine starter system from being used. There are three ways to get the engine started in such a circumstance... 1. use the key fob to 'disarm' the system... 2. put the key in the ignition and turn it to the 'RUN" position and wait until the alarm stops (horn stops beeping and the parking lights stop flashing), then the engine will start.... 3. pull the starter relay from the UnderHood junction box and bypass the starter circuit (key in ignition and in the 'RUN' position), jumper the starter solenoid circuit to energize the solenoid to start cranking the engine -- it should start then.

ok here you go
make sure the battery is fully charged befor starting
turn ignition to run
attempt to start once then release the key in the run position
let vehicle sit with the key on for ten minutes
the security light should turn off
turn igniton switch off
wait 5 seconds
turn key to run position
let vehicle sit for 10 minutes
turn key off
wait 5 seconds
turn key to run position
let vehicle sit for ten minutes
turn key off
wait more than 6 seconds
and start engine

definately ignition switch gone bad, replace them. go from there.

This particular problem is referred to as "Dieseling" actually. Older carbureted vehicles do it quite often. Usually it is caused from the vehicle actually receiving too much fuel and running rich enough to keep the vehicle operating after the ignition is shut off. On a diesel motor, there are actually no spark plugs, the mere compression of the cylinder causes the igniting of the fuel. So my guess would be is that the motor is running rich, for whatever reason. I honestly doubt it is a vacuum leak, however I wouldn't rule out that possibility completely