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Fault B2799

Bill Owner/Technician Michigan Posted Latest Edited

Question

Updated

Electrical

Security

2007 Toyota Camry CE 2.4L (2AZ-FE) 5-spd (E351)

Crank / No Start

History of vehicle is unknown used car lot aquired it? tried throwing some parts and then towed to me. Fault #B2799 engine immobilizer is current in ECU, no faults stored in immobilizer module. Initially the key was in 2 pieces when it arrived:) I replaced and register a new key also verified VIN # stored in ECU matchs vehicle-Security light goes out when key is inserted now. Fault still current - At ECU connector A24 pin 11 (IMI) I have 0 volt with key out of cylinder and a nice square wave key on ( pic 1) .

At pin 10 (IMO) 12v with no key in cylinder and a duty cycle with key on but only for about 2-3 second and then it goes back to 12v ( pic 2 ) -- hoping someone knows theses signals better than me. Thank you!

Nollan Technician

Washington

Nollan Default

Have you performed ecu communication ID registration? If transponder ecu or ecm have been replaced, this is a necessary step.

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Christopher Technician

Texas

Christopher Default

As Nollan said, you'll need to do the ID registration, but I'd recommend 35 minutes, not 30 (and no more than 45).

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Earl Mobile Technician

North Carolina

Earl Default

Do not let this code lead you in the wrong direction. Toyota vehicles will set this code when a crank, no start occurs.

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Michael Mobile Technician

Utah

Michael Default

The last one I had took 45 minutes to reset. 30 minutes just repeated the B2799 code. Short DLC pins 4 and 13.

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Joseph Technician

South Carolina

Joseph Default

Hey Bill, You probably have this one straight by now, but I can confirm that's what you need to see scope wise, I had an avalon the same year with a bad pcm a couple of weeks ago my after shots look like what you have. Also when doing the reset I have read that sometimes physical jumpering of 4 and 13 doesn't always work but you can "virtually" jump those pins with a scan tool under special

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Bill Owner/Technician

Michigan

Bill Update

Jumping DLC terminals for 35 minutes worked. No more B2799 fault. ( Yesterday I jumped them but got distracted by another vehicle and let it for +1 hour it did not work out) thanks ! Now on to the next problem.... No more Immobilizer issues... I have NO spark on cylinders 1&2. (3&4 ok) proved the ignition coils And found NO IGT signal from ECU to #1 &2 . Fuel injector is being

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Autel is one of the leading developers, manufacturers, and distributors of professional automotive diagnostic tools, equipment, and accessories. Corporate Partner