Kia Troubleshooting Questions? Ask a Mechanic
Hello and thank you for your question!My name is ***** ***** I will be assisting you with your question today.
do you still have any codes?
That's ok, it doesn't have to be running to store some codes. As long as the computer is powering up.
I would start by checking the timing belt, if you can, take the oil fill cap off and have someone crank it. Make sure at the very least the cams are turning.
I know you said it's not getting spark, do you have a test light or volt meter so we can check and make sure the coil is getting power to it?
Ok, give me a moment to pull up the wiring diagram to see if we can test the wiring to the coil and the cam sensor.
Does the check engine light or service engine light come on when you turn the key on?
first, lets take a look at the cam sensor. 3 wires, one wire should have battery voltage, one should have continuity to ground and the center wire is the signal wire.
In the diagram, pin #1 is the ground, #3 is the power, #2 is the signal wire, which I do not think you really will see anything on unless cranking the engine
Can you explain to me how you are checking for continuity to ground please?
Good enough, should mean you have ground.
Lets do the same with the crank sensor.
heres another diagram
I think you should check the battery too, it should be closer to 12 then 9
The pins are the same, 1 is ground, 2 signal and 3 power.
Ok, is the battery voltage actually only 9 volts?
If it is, I would try a jump start. Some of these won't fire the coil and injectors unless the engine is cranking at least 250-300 rpms. If the battery is that low, it might actually not be turning on the pulse and ignition
clearly then the battery is weak, you should charge or replace it. No, I don't think it's the problem if the car won't start, but, still trying to get it running with a low battery isn't helping.
Can you check the pink wire at the coil for power with the key in the run position please and let me know.
At this point I am unsure where to go next.
I am going to go ahead and open this up to the other experts. Please don't reply or rate because it will lock it back to me and nobody else will see it and be able to try to help.
Hi there. Different expert here.
Nowadays, this type of diagnosis requires using a capable scan tool that can communicate with the ECM and tell us what the issue is, and a lab scope to verify that information.
If the scan tool and scope are not available, we can go by the fact that often times coils go bad and loose resistance; when that happens, primary ignition circuit amperage increases and damages the transistors in the ECM that switch it on and off. So, if crank sensor signal and primary ignition circuit power are both OK and still there is no spark, then the most likely culprit is a bad ECM.
A new ECM will most likely fix the no start issue. However, if you need assurance, then the system needs to be checked using a capable scan tool such as, or equivalent to the GDS. That same scan tool will be needed to program the new ECM.
I wish there was an easier way to diagnose and repair these issues. The fact is that car manufacturers have designed their vehicles to be brought back to their dealers for service where factory-trained technicians using vehicle-specific tools and equipment can do the work.
Global Diagnostic System is a PC-based tool that is used to diagnose and program onboard modules on Hyundai and Kia - click here to view an example from AE Tools.
Is the vehicle drivable or are you towing it there?
I got it. My advice is to give them a call before you do; sometimes dealers get cranky when you don't purchase the parts directly from them.
Sorry for the delayed response - I usually log out by 8 PM
I looked at that ebay ad and noticed the tool is a knock-off from China with no manufacturer information or an identifying part number - all I can say is "caveat emptor" (buyer beware)...
The GDS I'm familiar with is proprietary and only available to Hyundai and Kia dealers.
I've actually never heard of a dealer programming a new PCM on a vehicle that wouldn't start to begin with - how would they confirm the programming? I'll opt out and reopen your question to the field. Please don't rate or reply until another expert responds or the site will cycle this back to me.