CarbonSteel
Well-Known Member
This is not how JSCAN works. It writes to the BCM/PCM just as the WiTechii system that Jeep uses does. It is merely changing a value from a set menu of selections--such as going from a 4.10 gear ratio to a 5.13. It is not adding or changing any software within the system so there is nothing to default back to and a tech at a dealer is only going to do the necessary, they would not go setting by setting to check/change the values.Thank you for this detailed explanation - makes sense. But does give rise to another question: if using JSCAN to set a gear ratio - there is no 'unmarrying' it when it goes to the dealer. Let's say Jeep changes or upgrades your computer based on what it 'should' be (according to their records/computer) - but your Jeep's computer really contains something different (because you used JSCAN to change it). Does the same logic apply? Because conventional thought doesn't seem to suggest to reset your JSCAN programming before taking to the dealer, could you still be bricked?
In the scenario presented it seems the Tazer might have the advantage of allowing you unmarry it and restore it to what it 'should' be...? IDK... just wondering.
Even if they did, it is not a big deal because:
1. A dealer tech cannot tell how the value was changed, just that it was. It would take a FCA "programmer" to get into the code to see that JSCAN was used to change a value.
2. All one needs to do is change the value back using JSCAN afterwards and so no harm, no foul.
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