Lotus Elise Alarm PIN Hack

Alarm PIN Hack

Recently one of my fobs went through the wash I opened it up and dried it out. Unfortunately when reassembled, it wouldn’t mobilize the car. No big deal, I figured it just needed to be reprogrammed.. one problem, no PIN (dealer never gave it to me) .

I had several items in my “car” file that had 4-digit numbers that I thought might be the PIN. I tried them all to no avail.

One thing I did notice when attempting to enter the PIN was the tach light just kept flashing after entering the first digit. Figuring that this would likely give some indication if I made a correct entry, I repeated the procedure with different digits until I found the correct leading digit and the tell tale light went out. Moving on to the second digit and repeating this procedure I discovered the next PIN digit. Repeating several more times for the third and fourth digits I found the full PIN.

So.. if you cannot find your PIN, here is how to hack your alarm system PIN:

Be prepared to be locked out of the alarm PIN entry several times unless you are an incredibly lucky guesser (in that case, I suggest you buy a lottery ticket). You can still use working fobs when you are locked out – you just cannot continue hacking until you have a time out.

Finding the First Digit
1. With the system is immobilized (security tell tale flashing), Turn the ignition on and off 3 times within 7 seconds; the security tell tale in the tachometer will light for 3 seconds. NOTE: After several unsuccessful PIN entries the alarm system will lock out and the tachometer light will continue to flash. Simply wait 15 minutes and the system will reset so you can try again.
2. Immediately after the tell tale goes out, switch ON the ignition. After 1 to 9 tell tale flashes, turn the ignition off.
3. If the tell tale light stays off, then the number of tell tale flashes in step 2 is your first PIN digit. If the tell tale light continues to flash it is NOT your first PIN digit.
4. Turn the ignition off for 10 seconds and repeat steps 1 through 3 with remaining 1-9 digits until the first PIN digit is discovered (the tell tale light stays off).

Finding the Second Digit
5. Again, with the system is immobilized (security tell tale flashing), Turn the ignition on and off 3 times within 7 seconds; the security tell tale in the tachometer will light for 3 seconds.
6. Immediately after the tell tale goes out, switch ON the ignition. Count the number of security tell tale flashes until equal to the first number of the PIN, then turn the ignition OFF, then back ON again.
7. After 1 to 9 tell tale flashes, turn the ignition off.
8. If the tell tale light stays off, then the number of tell tale flashes in step 7 is your second PIN digit. If the tell tale light continues to flash it is NOT your second PIN digit.
9. Turn the ignition off for 10 seconds and repeat steps 5 through 7 with remaining 1-9 digits until the second PIN digit is discovered (the tell tale light stays off).

Finding the Third Digit
10. Again, with the system is immobilized (security tell tale flashing), Turn the ignition on and off 3 times within 7 seconds; the security tell tale in the tachometer will light for 3 seconds.
11. Immediately after the tell tale goes out, switch ON the ignition. Count the number of security tell tale flashes until equal to the first number of the PIN, then turn the ignition OFF, then back ON again.
12. Count the number of security tell tale flashes until equal to the second number of the PIN, then turn the ignition OFF, then back ON again.
13. After 1 to 9 tell tale flashes, turn the ignition off.
14. If the tell tale light stays off, then the number of tell tale flashes in step 13 is your third PIN digit. If the tell tale light continues to flash it is NOT your third PIN digit.
15. Turn the ignition off for 10 seconds and repeat steps 10 through 13 with remaining 1-9 digits until the third PIN digit is discovered (the tell tale light stays off).

Finding the Fourth Digit
16. Again, with the system is immobilized (security tell tale flashing), Turn the ignition on and off 3 times within 7 seconds; the security tell tale in the tachometer will light for 3 seconds.
17. Immediately after the tell tale goes out, switch ON the ignition. Count the number of security tell tale flashes until equal to the first number of the PIN, then turn the ignition OFF, then back ON again.
18. Count the number of security tell tale flashes until equal to the second number of the PIN, then turn the ignition OFF, then back ON again.
19. Count the number of security tell tale flashes until equal to the third number of the PIN, then turn the ignition OFF, then back ON again.
20. After 1 to 9 tell tale flashes, turn the ignition off.
21. If the tell tale light stays off, then the number of tell tale flashes in step 20 is your fourth PIN digit. If the tell tale light continues to flash it is NOT your fourth PIN digit.
22. Turn the ignition off for 10 seconds and repeat steps 16 through 20 with remaining 1-9 digits until the fourth PIN digit is discovered (the tell tale light stays off) and the system is mobilized.

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