07 XC90 Brake Failure - Stop Safely

nyc1836 · Post by **nyc1836** » 14 May 2017, 17:46

About 6 weeks ago we drove the SUV from Texas to Miami stayed there 2 weeks and came back total about 3000 miles the anti skid service and DSTC came on several times car drove fine the other night my wife was 5 minutes from house started car abs check engine and other lights came on she told me to check.I tried to start car no luck Brake Failure - Stop Safely.My friend mechanic checked battery and also tried starter from under car starter and battery good.We got the ABS module with pump and tried to hook up the plug to the new one did not disconnect old hoses yet same thing.We ere not able to get a good obd reader yet mine that I have says error.My question is do I have to reset codes in order for it to work did any one hear that if the Brake Failure - Stop Safely goes on it wont let you start car any advice please

Post by **oragex** » 14 May 2017, 18:35

There seems to be a CEM relay that fails, not the whole CEM, just a small black box relay on it
http://forums.swedespeed.com/showthread ... -shuts-off

There's also this owner who had a more rare issue
viewtopic.php?f=9&t=80918

nyc1836 · Post by **nyc1836** » 16 May 2017, 10:34

We just hooked up snap on obd computer scanner and got this ECU needs to be determined to correctly identify this system switch ignition on.ignition is on lights on etc fan works seems like computer not communicating with obd any advice if I get VIDA DICE if there is no communication with ECU (bad) will I get better information of problem any advice?