The resistance between the vp251 chip buses is 45 volts.
With nfc function, standard NFC security chip, support full function NFC, traffic card, access card, vivo Pay.
This is the car computer board chip, can bus transceiver chip.
The optocoupler input is a light-emitting diode, and the output is a photosensitive triode. General multimeter resistance measurement can only estimate whether it is bad or not. The best way to find out if it works is to do a circuit test. A simple test can be done by adding a few milliamps of current to the input to see the change in the resistance of the output.