Itzhaky Posted October 10, 2008 Report Share Posted October 10, 2008 Caddy DeVille '97. Trying to start, I get: "Starting disabled due to theft possibility". Tried another key, same response. Any suggestions how to re-set, or by-pass the anti-theft system? Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted October 10, 2008 Report Share Posted October 10, 2008 I would like to write this as a generic response we can add to the FAQ file, to supplement the current passkey error article, so everyone please review and revise if needed: The antitheft systems reads a resistor value on your key. Once the ignition tumbler and the key have become worn, they have difficulty making good contact. First, try the other key. (you tried this). Second try spraying WD-40, which is a lubricating oil, on the key and sliding it in to the ignition, remove it, clean it off, repeat. This can clean off the contacting surfaces and help. Finally, you will have to replace the ignition tumbler switch. You want to do this in such a way that you don't have to also replace the keys at the same time to avoid the additional expense if the keys are not worn. You do this by measuring the resistance of your current keys then 'cherry picking' one from the dealer parts bin with that resistance(?) If, as is more likely, the keys and ignition are both worn, you actually want new keys anyway. There is an alternate in which you simply bypass the signal from the steering column to the computer from this feature. Under this plan you measure the resistance of the chip in your key, and compare it to the known resistance values here. Non-Caddyinfo articles here or here discuss how to design a circuit that will send a constant good input to the system. The car will no longer have theft protection then however. Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
lothos Posted October 11, 2008 Report Share Posted October 11, 2008 There's a little more information in this thread: http://caddyinfo.ipbhost.com/index.php?showtopic=19366 WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
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