DO YOU AVE TO RESET IMMOBILIZER AFTER YOU RREPLACE FUEL PUMP

Question edited for clarity and toss in some CAPS.
Question moved to model category.

When you replaced the fuel pump, you disconnected the battery, yes (because they tell you to)?

You now need to reset the security system and engine immobilizer.

How do i reset the Acura immobilizer?

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To reset the immobilizer on Your Acura, insert the ignition key in the driver-side door lock. Turn the key to the unlock position. Turn the key to the lock ...
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something close , does not do any good . get it right or do not post

Go to the dealer take proof the car is under you name with the vin no. They will make u a key and it will bw the same as your old one it will start you car

There are several parts to this system. Have the codes read. Security is built into the BCM. The BCM sends a signal to the ECM/PCM to start the car. Both of these have to be programmed, you can't just replace them. You have other parts also that can set security.

The security light flashing is the indicator. The fuel pump is disabled by the ECU because the immobilizer system does not recognize the transponder chip inside the key.

There could be several causes.
a. Either the transponder chip inside the key is bad, not programmed, or missing
b. The antennae that is located around the ignition lock is bad and/or not reading the transponder chip inside the key.
c. There is a wiring issue between the ECU and antennae.
d. The ECU is bad

You may want to seek out a qualified mechanic or automotive locksmith for help, not all mechanics and/or locksmiths are capable of handling the immobilizer systems on these vehicles. So be clear when discussing your problem to them and make sure they are capable of handling this type of problem.

If the key is not original, check to see if it is a cloned key. Some cloned keys use batteries, when the battery inside the key dies, it no longer communicates with the vehicle. Although it's not common, regular transponder chips can go bad, usually due to physical damage.

An immobilizer transceiver coil tester can be used to test the signal from the antennae at the lock cylinder.

If the ECU is determined to be bad, a used ECU with matching part numbers can be used as a replacement. Contrary to what a dealership or some shops may tell you, all that is required is an immobilizer reset service on the used, replacement, ECU to get it to function with your vehicle. A used ECU and an Immobilizer Reset Service is much cheaper than a new ECU from the dealer. Make absolutely sure that this is the problem before going this route though.

could be a weak fuel pump or a plugged fuel filter try a new fuel filter first

there is no inertia switch in these models, that is a mainly ford system. However General Motors products do usually ave fuel pump systems that break away in the event of a strong collision to prevent fuel spillage, see if your broke

have dealer check for bullentin customer only pays for keys toyota warranties comp..

Are you using a Genuine Toyota replacement fuel pump? If not, get the Toyota part. "Aftermarket" pumps have been known to quit for no reason, I have observed this a few times.