2013 Toyota Sienna starts, runs, and dies p1604 p1605 

Welcome! I think that was my first video.

I do not know what your problem might be, and do believe in magic. However, this isn't magic. The one I had would die.

@@RustBeltAuto Hi my friend few years ago i was working on one car Lexus 2009 i was doing body work on the car after i finish painting the car the car start and die when you push the accelerated and the mechanic put the scanner and told me " is the alternator" and i say ok changed after he changed the same thing😰😰 and i say what? So i call the customer i told what happen and he say i have mechanic so he take his car from my place and his mechanic check the car and the same thing you did on this video it was the relay and the sensor on the airflow that's it .... I change the alternator for nothing..

Clear codes, and recheck. Code usually exists from stalling issue.

Mines the same but Sienna 13

Power probe 3

I don't know. That requires diagnosis.

Possible rich "looking" from overly lean condition, not being able to produce a flame front. Use scan tool. Read STFT when driving. Spray flammabes like brake cleaner/carb cleaner around intake, and vacuum lines to see if STFT values go negative, indicating a leak. Test MAF, and make sure it's clean. That's where I would start. Other than that, i have no idea, because I'm not looking at it.

Check charging system, battery and do a parasitic draw test. I would also check for any pending codes. They may not produce a check engine light. Best advice I can give you.

Relay's usually last a very long time. It probably has something to do with the way the circuit is built. There is a diode built into the relay's to help protect the circuit from induction voltage spikes. My guess is the way this system is wired, all the windings in the circuit is creating too much induction, like how an ignition coil works. That's one reason why a reliable circuit needs to be as simple as possible. You start stacking relay's, and motor windings on top of each other too many times, and you can create capacitance/induction issues. It probably rarely happens in such a way that the engineer's/technicians never see it happen. Personally, after looking at a wiring diagram of the fuel pump circuit on that vehicle, I'm still perplexed at why they would do such a thing, and have never seen a circuit in a vehicle built like that, that I can recall. At this point, I will say your question depends, and I'm not sure.

Well I appreciate your feedback and the video for helping me solve my problem so quickly. I guess I should buy a spare relay and wait to see if it happens again. I’ve had a couple other issues with this truck all related to the electrical system. I currently have an undiagnosed issue with the AC system and another with the door locks on two doors which I’m guessing is the lock motors. The dealer I bought the truck from told me they swapped out the AC relay I’m almost wondering if I need to check that now.

@@hoodyboy18 good luck.

Not this time.

Hossayn Sakyb ShorkR wholly crap, it only took you 2 months to figure that one out. What a nightmare. Always difficult to test an ECU. Did it have the same codes?

Rust Belt Auto , no it took me a week. Not 3 months.

Same codes?

Almost every FI car has them in the tank.

A simple google search came up with this. Good luck! P1603 Code - General TCU Communication Error OBD-II code P1603 indicates an issue with TCU communication. There are communications that exist between the engine control module, or ECM, and the transaxle control module, or TCM. This communication is done through a control area network, or CAN. With the communication of the CAN, an independent pin and wiring is needed to receive a signal that includes sensor information from the ECM. The more information there is to communicate, the more wiring that is needed. When it comes to CAN communication, all of the information communicated is done alone control modules like the ECM and TCM using CAN lines. When there is a problem with these lines, the ECM will detect the problem and store a P1603 trouble code; the storing of the trouble code is what causes the SES or check engine light to illuminate on the dash. Possible causes of trouble code P1603 include: Faulty transaxle control module (TCM) Faulty engine control module (ECM) Harness running from the TCM to the ECM has a short There is a poor electrical connection between the TCM and ECM Diagnosing the exact cause of the problem should always begin with a visual inspection that could reveal bad wiring, loose connections, or damaged parts. From there, it is a matter of running down the list to determine what needs to be replaced. In general, a bad ECM will cause a loss of power, poor fuel economy, and stalling engine. While a bad TCM will have more prevalent transaxle issues like erratic shifting. While we have made every effort to provide accurate information, you should always consult a professional before making any repairs. The purpose of this guide is to explain the possible causes of Toyota trouble code P1603; it is not meant to be a definitive trouble-shooting guide or repair manual .

@@RustBeltAuto Thank you!

Seen more than one sienna where the hose cracked from air cleaner to throttle body introducing unmetered air

@@bobbyu8991 do they have that p1603 code? Usually torn intake boots cause maf, and lean bank codes.

mauipinoyracer it's a 5 pin.

Rust Belt Auto thanks

Should be a reference in the owners manual, or labeled on the fuse box cover. You could try a Google search too.

I don't understand.

Sorry, It's not even the same car. I cannot help you very much without actually looking at the vehicle. Good luck!

Did your p1605 code cause your trans not to shift into 3rd ?

Is it soldered, or bolted in the box? Did they tell you that you need to replace the fuse box or something? Something doesn't sound right about that.

@@RustBeltAuto I dont know yet. I'm going to pull the box come Monday. Dealer couldn't locate the relay or could I. Nothing on fuse box cover either. There's EFI fuses but not relays. They're on the Mitchell diagram but not visible to pull and replace it seems. After I searched around everyone's saying its integrated, to replace the box. Yeah I'm in a little disbelief like I'm missing something here...

@@hashem_g1423 Surely the dealer must be posing as the dealer. Not quite the strangest thing I've heard all month. Just for fun I looked up 2014 Camry fuse box on Ebay, and people are selling them. One is a funky black box that looks like it cannot be taken apart with a sticker that has a part #82720-33220, and the others have fuses, and relays in them. One listing is for the whole harness with what looks like 2 fuse/relay boxes. Might want to check it out to give you an idea of where it is. Hope that helps.

@@RustBeltAuto I will check them out! Thank you!!