Keyless Entry system

2004 TOYOTA AVALON
189,000 MILES • V6 • 2WD • AUTOMATIC
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EDWOOSR667
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Hello, I purchased this car about 2 months ago. The problem is the original remote key fob which i only have one, worked okay for about a month then it started working sometimes then not at all. i checked the battery, it read 3.6v okay, next i bought a new remote key fob online with matching numbers on the old one, when i put the car in program mode and followed program instructions the door locks cycle (lock/unlock 2 times) it did not pair. so, i changed the door control receiver module which i got the same results not pairing what could the problem?
Question 2.
if i install a Car Security System Alarm with Keyless Entry, will the new system Keyless Entry use its own signal to lock and unlock doors, or does it use signal from the Toyota system?
Dec 28, 2021 at 12:16 PM
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JACOBANDNICKOLAS
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Hi,

There was a technical service bulletin that indicates two of the steps need to be reversed on the Avalon.

I've attached the most updated TSB that I could find. Take a look through it and let me know if it helps.

Take care,

Joe

See pics below.
Dec 28, 2021 at 5:54 PM
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EDWOOSR667
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sorry for the slow response. Thanks for the info.
Dec 29, 2021 at 4:51 PM
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JACOBANDNICKOLAS
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Hi,

No problem whatsoever, and you are very welcome. Has the problem been resolved? I'm interested in knowing if that took care of the issue.

Joe
Dec 29, 2021 at 5:36 PM
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EDWOOSR667
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not yet it's my wife's car, so i have to wait until she keeps still, i will let you know soon.
Dec 29, 2021 at 6:33 PM
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EDWOOSR667
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hello Joe, we have returned the new key fobs and decided to install a Car Security System Alarm with Keyless Entry and bypass the Toyota Keyless Entry system hoping this will solve the problem. Do you have a car alarm-wiring-diagram for the Avalon?
Dec 29, 2021 at 8:34 PM
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JACOBANDNICKOLAS
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Hi,

Yep, I have them. Please sit down before reviewing the schematics. LOL

The first 2 pics are for the anti-theft immobilizer and pics 3 and 4 are the forced entry schematics.

Let me know what I can do to help.

Joe

See pics below.
Dec 29, 2021 at 10:15 PM
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EDWOOSR667
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thanks a lot, we ordered a Security System from online by the time i get it i have time to review the schematics, i will get back to you soon.
Dec 29, 2021 at 10:46 PM
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JACOBANDNICKOLAS
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You're very welcome. Take care, have a great New Year, and let me know how things turn out for you.

Joe
Dec 30, 2021 at 2:45 PM