TRW SRS B1001 ECU error.
Another one of these TRW SRS B1001 ECU error jobs. We get several each week sent to us from all over the world. There is a lot of BS on the internet about these with error B1001 cannot be fixed. Let’s take a look!
TRW SRS B1001 ECU error.
Upon testing this particular job, the unit was internally shorted. On the bench was drawing over 1 amp with voltage pulled down to 3 volts!
We replaced several components on the 5v rail, bought the ecu to life which enabled us to fire up the ECU on the bench for further testing.
The eeprom dump was found to be corrupted (surprise, surprise).
We set about re-constructing the data on the ECU, once this was achieved, we bench tested using CAN to check the repair was sucessful. We then put the ECU back together and re installed it back into our customers camper van.
Checksum data and several lines of config data have been redacted from the pictures to retain pertinent information to as how we go about the repair.
Many companies will tell you that this ECU simply cannot be repaired. We have companies who, for some bizarre reason, get in touch with us to say it cannot be fixed, which perpetuates into the end user who is skeptical in sending us their unit as they have been told so many times by so many different people that the only thing to do is to bin it, or use it as a paperweight.
Moreover and more worryingly, is the fact that there are ‘companies’ out there offering to fix your ECU by simply flashing someone elses data onto it.
Firstly, these units VERY rarely fail on just software. (9 times out of 10 there is also a component failiure). Obviously just flashing some software will not cure a component failiure…but that is what you will get!
Let’s say that you are one of the lucky ones where you just have corrupted software. You send it to a ‘company’ who will then flash generic software.
You get your ECU back, plug it in and…the warning light goes out…all is fixed…..well, probably NOT!!!
The problem with flashing a generic file is who knows if its from a vehicle with exactly the same airbag layout as yours?
Those nice side curtain airbags and knee airbags you have may not have been installed on the vehicle that the file was pulled from.
You will never know…until if the time came you were unfortunate enough to be involved in an accident where those airbags could have saved your life, your passengers life or limbs.
The airbags that are optionally fitted in your vehicle will simply not inflate as the ECU does not know they are there!
Why take the risk? If you sell the vehicle onto a new owner, they would unwittingly be unaware that most of their airbags would not inflate!
You need to send your unit to a company who knows how to fix at a component level and who are competent in cryptography to reconstruct your original data and sucesfully correct its checksum.
You or someone you love’s life/limbs could depend on it!