All right guys, put your thinking caps on. Got a buddy with an 06 lantra that wont start, although I didn't check it my self he said there is no spark and I trust him. He has swapped the crank position sensor, cam sensor and I believe the Idle speed actuator. I came into the picture at this point and checked the coil pack plug. There are 3 wires running the show there at the coil pack plug. One wire had power with the key on. I checked the other two wires that I assume are for the front an rear coil pack signal from the ecm. I figured the signal would be sent from the ecm to the coil at 5v dc, if this is wrong please let me know. What I picked up with the key on was 0.09v dc, basically nothing. When cranking, the voltage jumped to 0.18v dc, this was constant while cranking for either signal wire. This was done with the coil pack plug unhooked (testing at the plug) and a multimeter. Couple other factors, the head was just rebuilt. Also the battery when I was there was low, 10.5V, just enough to get her cranking.



1) Was this the right way to check or should the coil plug be hooked up when testing?



2) What sensors on that motor can go bad and cause a no spark issue?



3) Any other suggestions.

 

Was the crank sensor new or known-good?



Charge the battery. <10V and you've killed it.



I want to say the coils are supposed to be 12-13 ohms but I forget from where to where it's been so long since I had to check them (thank God)

 

Interesting. According to webtech, there should be voltage at the positive terminal of the connector. It doesn't specify how much, so perhaps your 0.09V is legit.



For testing the coils, disconnect the wiring harness connector, then:



-There should be 0.58Ω ± 10% between terminals 1 and 2, and 1 and 3.

-Probe between splug lead connectors 1 and 4, and 2 and 3. The resistance should be 8.8kΩ ± 15%.





Other than that, the spark plug leads should have a resistance of no more than 2.6kΩ per meter of cable... actually, it also says 5.6kΩ per meter is fine elsewhere on the page. I guess just check to see if the resistance is strangely high. I'd also check the harness leading to the crank angle sensor and cam angle sensors just to be sure.



What about an immobiliser problem?

 

Hmmm, immobiliser system, did they start using that on the 06 elantras? The imobilizer was there in the schematics on my 02 elantra engine for my beta swap but it was not used. I will give my buddy the testing info, thanks Wheels.



Stocker, the crank sensor was swapped with a 01 beta crank sensor and was used so working or not could be an issue still.

 

I'm not sure when they started using it in the US, sorry man. Is it a late XD2 or an early HD? Surely, even without smartra, it would have some sort of immobiliser anyways.



If stuff is getting power or the fuel pump is priming, you could at least rule out smartra.