Immobilizer light flashes twice continuously while driving

Recently made a copy of my original key with an eBay-purchased blank with chip. Programmed using the Toyota Smart Keymaker and programming went just as planned and it works great for starting the truck. No problems.

When I start the truck with either the old or new key it flashes the immobilizer light on the dash twice continuously, even when driving. Still starts fine and everything else works normal, but the light flashes twice continuously while running/on and is solid-on when off (just like before).

Any clues?

 

Anyone?
Tried resetting the ECU. Still flashing twice repeatedly.

(to the top)

 

Try cycling the key on and off five times within 10 seconds. I saw that trick work on some Tundras and a Tacoma after programming new keys.

 

Tried this, as well as cycling it 10 times quickly, but neither does the trick.
It's weird that both the new and old key cause this flashing. Nobody has run into this before? It doesn't describe this in my owners manual unfortunately.

Dealer time?

 

Just a question, you dont by chance have both keys on the same ring do you? Having two coded keys close to the sensor would give the system to high/low a resistance causing what your explaining.

 

I did have both close-by at first, but I to thought of this and moved them apart. One key in the truck and the others in the house - still happens

 

I'm having the same problem with my immobilizer light. It flashes when driving (no matter which key) but stays lit continuously when engine is off. I just posted a thread about it 10 minutes ago. Hope someone here knows the fix.

 

Engine Immobiliser
Engine Immobiliser System: Parts Location, System Diagram
Engine Immobiliser System: System Description, How To Proceed With Troubleshooting
Engine Immobiliser System: Registration
Engine Immobiliser System: Problem Symptoms Table, Terminals Of ECU
Engine Immobiliser System: Diagnosis System, DTC Check / Clear
Engine Immobiliser System: Data List / Active Test
Engine Immobiliser System: Diagnostic Trouble Code Chart, B2780
Engine Immobiliser System: B2784
Engine Immobiliser System: B2793, B2794
Engine Immobiliser System: B2795, B2796, B2798
Engine Immobiliser System: B2797
Engine Immobiliser System: B2799
Engine Immobiliser System: ECU Power Source Circuit

 

Your trying to register a already programmed key.
The system is looking for another key to add.

 

You are correct. To close the program cycle the key 8 times in a row and remove it. That fixed my 2008 Tundra.