Scan failure with Airbag ecu on MG ZR

Hello, I wanted to check the Airbag ecu on a 2000 MG ZR, but I got only "init fail" and can't do anything more, I tried both Temic V1 and AB Autoliv but same result

There are some things that will prevent pscan from talking to an Airbag ECU:-

1. ECU is not powered up (blown fuse, broken power wire, bad earth wire).
2. ECU is not connected to the data line on the diagnostic plug.  There is a wire from the ECU to the diagnostic plug and if that is open circuit or shorted to ground, then pscan won't be able to talk to it.
3. Faulty ECU.  We have seen ECUs go bad to the extent that they won't actually communicate with a diagnostic tool anymore.

You will need to start digging into wiring diagrams, checking continuity, check that the ECU has 12V on it with ignition on etc to fault find this.

A last resort it to get a used airbag ECU and swap that in to see if pscan can talk to that.

It is also possible that the pscan interface can have a fault, but, normally if it can talk to other ECUs in the car then that would rule that out.

Thanks, I'll check because I can read the Mems3 ECU without problems

MEMS3 and airbag (Temic or AB Autoliv) both use the same pin on the diagnostic socket.
Therefore if your pscan can talk to the MEMS3 then there is no problem with the pscan.
Most likely there is no power to the airbag ECU or it has completely died.
Pscan is not able to reconfigure airbag ECUs, therefore if you get replacement it's best to get one from a car with a similar configuration.