Hi friends, many times I had this error with airbag modules from Mazda and Ford:
U3000 - INTERNAL MODULE ERROR
Sometimes the problem was with the seatbelt pretensioners, if I put a resistor, even with the correct value (2.2 to 3.2 ohms it's ok) sometimes I retrieve this U3000 error, solution for me was the next procedure:
1.- Disconnect the airbag module.
2.- Remove the resistor from the seatbelt pretensioners or disconnect them if you replaced with new ones.
3.- Reinstall the airbag module with seatbelt pretensioners disconnected.
4.- Scan the airbag module for Dtc, now you have U3000 code and seatbelt pretensioners Dtc's
5.- Erase Dtc's and now you can erase successfully the U3000 Dtc but seatbelts pretensioners errors remains active.
6.- Turn off ignition switch and reconnect the seatbelt pretensioners or reinstall resistors.
7.- Turn ignition switch on and scan and erase Dtc.
In modules with Infineon mcu sometimes the problem is with pin 61 (P0.3), if this pin goes to ground you will retrieve dtc U3000.
To successfully read this mcu need to lift pins 60 (P10.1) and 62 (P10.2) and connect it together to the programmer (B6 pin in xprog as example), need to lift those pins because they are originally grounded and here comes the problem: sometimes when we lift these pins accidentally short the pin 61 to ground and the module retrieves the DTC U3000 , need to lift these pins, check if the pin 61 is not shorted to ground and clean carefully any trace of solder paste.
Unfortunatelly sometimes the problem is the ic driver that controls the deployment of the airbags and pretensioners, in this case the better solution is the replacement of the airbag module. I never tried to repair because is very risky, we can deploy an airbag by accident if the ic driver is not good or if we make any error with soldering.
If we clear the crash data and retrieves dtc U3000 maybe we cleared most than needed but is easy to check this: rollback the original saved file and if the dtc U3000 is not present then we have a bad clearing.
I share this as my OWN experience with this kind of airbag modules, if someone have another solution please share with all.
I hope this can help someone...
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