Drawing is of no help.
Could be a custom part.

NOW can you again check

 

Made in china...

No, Expert! I is not Made in China, Because it is in the Very Expensive Luxury Car,
Please have a look again the Completed drawings I done. Can it be Voltage detector IC?

 

In my experience, custom chips are common in cars, because the volume is so high, and there is an even higher incentive to protect designs and discourage modifications/repairs without buying from the manufacturer. That is, a $10 piece of desk electronics would just be discarded. A $100,000 car is more likely to be repaired and the owner will pay $100's for replacement parts.

 

Please think about technique, we are in Circuit forum. If the IC is specical, so can you guess which function on it!

 

So offer to pay me

It would be an honor to pay you sir. Although I do consider you a rockstar, I cannot pay a rockstar prices.

 

Is it an SOT-25? How many pins on the device? Torex Semiconductors is in the Automotive Electronics business making power monitoring devices. The fact that it connects to a TLV431 suggests that it is part of a power management system.

 

Hello @SamR, i update more connections of CHIP U31 maked 045, its package is SOT23-6, 6 Pins, the strange thing is No Gound (GND) directly connect to any Pin of U31, and also I have to checked that U31 is NOT Kind of TRansistors or Mosfet.
Please help me to determine its function because you all are expert in this Forum!

 

Is it an SOT-25? How many pins on the device? Torex Semiconductors is in the Automotive Electronics business making power monitoring devices. The fact that it connects to a TLV431 suggests that it is part of a power management system.

If the part is actually the one you think it is, given the discrepancy in the packaging description, then it seems a reasonable hypothesis that it could be a power monitoring circuit. If that is true than a simple comparator would be a first candidate. If it is monitoring the range of 3.6 VDC ± 2%, then perhaps a window comparator. An inability to define anything approaching precise requirements would entail some real engineering effort. The posted image of the board is unreadable and next to useless. The impediments to forward progress are considerable.

 

is not Made in China, Because it is in the Very Expensive Luxury Car

I wouldn't rule it out, auto modules use many parts from Chinese manufacturers.

 

No, Expert! I is not Made in China, Because it is in the Very Expensive Luxury Car,
Please have a look again the Completed drawings I done. Can it be Voltage detector IC?

What makes you think that a chip made in China could not be used in a Very Expensive Luxury Car? That is a mind numbingly ridiculous statement.

 

then Do you think that the IC marking 045 is the Voltage monitoring?

 

The package is wrong for a standard Torex V Monitor chip which typically are SOT-23 or -25. Lends validity to it being a custom job.

 

The package is wrong for a standard Torex V Monitor chip which typically are SOT-23 or -25. Lends validity to it being a custom job.

Hello
just we can guess its function, because you can analyze the circuit excitation then will determine, because you are expert!

 

Hello
just we can guess its function, because you can analyze the circuit excitation then will determine, because you are expert!

I don't even have a guess. I've never seen an IC that was hooked up in this fashion.

 

just we can guess its function

To confound and discombobulate anyone trying to reverse-engineer their proprietary product is a pretty good guess...

 

To confound and discombobulate anyone trying to reverse-engineer their proprietary product is a pretty good guess...

Tell me about it... I have to decode stuff on fomoco's modules all the time. They love to mask everything and also like to turn normal packages into a unavailable custom footprint simply by reversing them. Also I have seen them take things like basic logic chips and add extra leads . It was something similar to a 74HCxx in a very odd size package Almost extra half a chip on it. Could never even find the package size it was I don't think. It was awhile ago so don't remember too much now. Was a PITA tho that I do remember.