Anti theft activated

Tiny
KIMBERFM7
  • MEMBER
  • 1998 NISSAN ALTIMA
  • 200,000 MILES
Key does not open doors they are stuck and no fob.
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Saturday, February 6th, 2021 AT 10:33 AM

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Tiny
KASEKENNY
  • EXPERT
If the anti theft is active then the only ways to disarm it are to use the key fob or key to unlock the doors. When you do this, the Smart Entrance Control Unit receives a ground signal from the lock cylinder and it shuts off the alarms.

So if the key doesn't work, you can try and lubricate the cylinders to see if they will turn if they are stuck with dirt.

If not, then you will need to replace the lock cylinder so that the key works.

https://www.2carpros.com/articles/test-or-change-electric-power-door-locks

If none of this works, then you can bypass the lock cylinder by grounding the Smart Entrance Control Unit pin 31. Take a look at the 5th attachment below where it says that it needs to be grounded from the lock cylinder to deactivate the system. So if you ground this circuit then the SECU will think the key was turned.

You can do this one of two ways. Either ground the circuit at the SECU or just jump the switch at the actuator. Please see the last attachment for more detail on this.

Let us know what questions you have. Thanks
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Sunday, February 7th, 2021 AT 8:15 AM

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