2017 JK unlimited wont start - JeepForum.com
 
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post #1 of 14 Old 06-22-2020, 08:24 PM Thread Starter
Phil_Andersen
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1993 YJ Wrangler 
 
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2017 JK unlimited wont start

1. Replaced starter
2. Replace starter relay
3. Replaced ignition switch and actuator pin
4. Jumped main starter feed to the starter actuator spade, jeep turns over.
5. Checked all fuses, they appear good, no breaks.

Have not replaced NSS yet, can't find it. Only thing different after all that work is my security goes out after I turn the key but then starts blinking. Before all this replacing it would go out and stay out.

Side note, anyone needs to replace the starter actuator pin, you need to get it from a dealer. The pin and starter switch are all one sealed assembly.

TYIA for and advice you can give me.

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post #2 of 14 Old 06-23-2020, 10:22 AM
cranbiz
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Actually sounds like the SKIM is not recognizing the key. A blinking security light is what happens when the key is not recognized.

Have you disconnected the battery to reset the TIPM? disconnect the positive lead, touch the negative lead to discharge the electronics. I would leave it disconnected for 5 minutes or so and then reconnect it.

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post #3 of 14 Old 06-23-2020, 05:49 PM Thread Starter
Phil_Andersen
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Did the battery thing. Still no start and security light still blinking
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post #4 of 14 Old 06-23-2020, 06:02 PM
Kruzin
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Do you have a spare key to try? Like cranbiz said, that blinking security light is a clue that your key may not be getting recognized.
These RFID chipped keys do go bad from time to time...

'09 JK Rubicon
'01 XJ Sport
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post #5 of 14 Old 06-24-2020, 11:01 AM Thread Starter
Phil_Andersen
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I have 3 total keys for this jeep. I tried all 3 hoping one would work but none did. Do you think I should have the dealership or a locksmith come out and marry the keys to the jeep?
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post #6 of 14 Old 06-24-2020, 01:50 PM
cranbiz
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If all 3 won't work, the SKIM module is probably bad.

Have you scanned it for any codes? You need a scanner than can read body modules.

06 KJ
12 JK, 2.5" Teraflex lift, Bilstein 5100's, BFG KM3's 37x12.5/R17
17 WK2 Trailhawk
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post #7 of 14 Old 06-24-2020, 09:39 PM Thread Starter
Phil_Andersen
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Thank you. I will have to find someone with a reader. Are they expensive to buy?
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post #8 of 14 Old 06-25-2020, 08:59 AM
cranbiz
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Unfortunately, one that can read body modules isn't cheap.

I don't know if JScan can read them but if it can, that's about $50 total between the software and the BT dongle.

I know that the Auto Enginuity system can, it also does a lot of other useful things like it can cycle the ABS pump. However, it's about $500 between the Chrysler software module and the OBD interface and it needs a laptop to run the software.

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17 WK2 Trailhawk
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post #9 of 14 Old 06-26-2020, 09:42 AM Thread Starter
Phil_Andersen
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You were dead on with the price. I bought the software just waiting on dongle they preferred to arrive. Spoke with JScan and they stated it will read all mods. Now just gotta figure out what I am doing with the software. Thank you for all the information. Hopefully this will help me find out what is wrong.
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post #10 of 14 Old 06-27-2020, 12:17 PM Thread Starter
Phil_Andersen
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Code I get with jscan.

Incorrect immobilizer key
Invalid skim key
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post #11 of 14 Old 06-28-2020, 01:20 PM Thread Starter
Phil_Andersen
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Had a lock smith come out and reprogram all the keys and still no dice. I wonder if the SKIM module is bad?
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post #12 of 14 Old 06-29-2020, 07:32 AM
cranbiz
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If the keys are good, it has to be the SKIM module.

06 KJ
12 JK, 2.5" Teraflex lift, Bilstein 5100's, BFG KM3's 37x12.5/R17
17 WK2 Trailhawk
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post #13 of 14 Old 06-29-2020, 02:51 PM Thread Starter
Phil_Andersen
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Can I just buy a new skim module and install it or is there more to it?
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post #14 of 14 Old 06-30-2020, 10:23 AM
Kruzin
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It's a computer module, so it wouldn't surprise me if a dealer needs to hook up their system to calibrate/train the module. But I'm just guessing.

If you plan to do this type of advanced repair work, I'd suggest investing in a FSM (factory service manual). They're expensive, but it would have paid for itself by now by helping you properly diagnose the problem instead of just throwing parts at it. It'll also give you the steps to be sure the skim module actually needs replaced and how to do it...

https://www.factoryrepairmanuals.com...l-shop-repair/

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