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how to Clone CAN CLIP ISO LED error on hardware

China Clone Renault CAN CLIP interface ISO can’t communication? how to replace the chip on can clip pcb, and fix ISO LED light up,

Looking for a bit more meadows, using a multimeter we can see that the ISO LED is controlled
 directly from microprocessor on CAN electronic board via component and 2×35 points connector. So I redid the welds of these components.

Another point on the CAN electronic board at the voltage converter 3.3Vdc -> 5Vdc ( LTC1871 ),we found a power MOSFET

 in case SOIC8 . I guess it is a FDS7760A following the LTC1871 datasheet (the reference of the component being buffed ! )
Here:




This component is cooled through the ground plane ! This is why it is slightly over- high.
 Moreover, a drain tabs ( in this case the pin5 ) is not welded ? ?
 So I resoldered this component properly, taking care of the well -plated to ensure contact with the runway under thereof.

After a test OBD2 table with a 12V DV power supply, again, the green ISO LED on CAN CLIP lights up.

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