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Discussion Starter #1
2010 Hyundai Elantra
No spark
Snap on scanner shows anti-theft code
Have done all the norms
Disconnected auto start, cleared code, try and it returns
Replaced Immobilizer coil Antenba, cleared code and it returned
Reprogrammed key, cleared code and it returned
At a loss now. Any other remedies anyone has come across would be appreciated
 

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Drives : Nissan NV200 Flies : Rans S6ES
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What is the code that is being logged? That might give us a clue about what's causing it.
 

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Have you checked the immobilizer status with the scan tool? Is the key and smartra status "learnt"?
Have you checked the smartra module power supply and ground?
 

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Discussion Starter #7
Snap on Versus vehicle specific connected through OBD2 port on car.
Hyundai parts guru saying if have replaced the Immobilizer antenna then it is the Immobilizer module has never had a key itself be the issue.

These are the two parts they can not keep in stock for this issue.
GULP :-S
 

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Hyundai parts guru saying if have replaced the Immobilizer antenna then it is the Immobilizer module
The trouble code suggests there's a communication error between the engine PCM and the immobilizer module (SMARTRA), which is why you need to check that the smartra power supply and ground is OK. It can't respond to the PCM if it isn't powered up.
 

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Sparkplug is correct but use the scan tool first. Run the diagnostic for the code checking samrtra first.
 

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Discussion Starter #10
Diagnosis done. But continues to throw the P1690 Immobilizer code. Ground and power appear to be good.
Immobilizer module replacement has been the suggested as the Immobilizer Antenna already replaced.

In taking the dash apart it appears there has been previous no start issues I am assuming as just about every wire under the dash has black tape wrapped around it from probing :-(

Anyone know if the Immobilizer module is a plug n play install or does anything need to be reprogrammed when you unplug the old and install the new?
Are there passwords and codes like when you reprogram the key?
 

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I've not done any work on the newer smartra immobilizers but on earlier version you could simply swap the smartra module. All the coding was in the engine PCM.

Don't forget to check the signal wire between the smartra module and the engine pcm too. Again, the module can't respond to the PCM is the communication link is open or short circuit.
 

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Discussion Starter #12
Well Immobilizer antenna and module both replaced. Won't let me program the module and key. Off to the dealer we went and wouldn't let them do it either.
Will keep advised on what the final outcome is.
 
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