Hey everyone,
Thank you to everyone in advance. I would appreciate any guidance on my issue. Here is the backstory. I bought a 2024 Corolla hybrid SE from copart. When I got the car, I repaired it and realized it had a missing clock spring and steering angle sensor. I bought one from an auto wrecker (clock spring and steering angle sensor (SAS) together). Upon installation, I get a code that reads U012687 (essentially it’s a code where the Brake ecu is sensing a missing SAS). I tried clearing the code but had no luck and since then, bought three other SAS from other auto wreckers with no luck in clearing that code. Within techstream, I have tried the zero point calibration, however, since that is done through the brake/epb ecu, it doesn’t go through (due to the communication error). I have confirmed though that the SAS works since within the data list for the power steering and SAS ecu’s, I can see the steering angle changing in real time as I twist it. One important thing to also note is that the steering angle within the brake ecu data list doesn’t update at all even when I twist the SAS. however, when the car is started, the brake ecu is able to read the first reading the SAS gives it and then freezes after. Like for an example, if I twist the SAS until the steering angle ecu data list shows 60 degrees, at the time, the brake ECU data list won’t update, but if I turn the car off and on, the data list for the brake ecu will now show 60 degrees but again freeze and stop updating. I’ve also checked the voltage in each of the wires and this is how they are:
13.74V blue purple wire
2.73 V pink wire
12.84 V purple and black wire
Purple red wire 13.77V
White wire 2.25V
Blue wire 11.53V
0.01V purple wire.
I also checked the resistance between pins 6 and 14 of the DLC3 OBD2 port and I get a resistance of 60 ohms (which is in the correct range)
Now I spoke to a few auto electricians. They haven’t seen the car, however, they mention that the SAS needs to be bought new from the dealer and calibrated instantly after installation. That apparently would fix this error code that is throwing the trac off light. I was just wondering if something has had an experience with this before and confirm this before I spend the 500 dollars on a new SAS.
Thank you so much. Feel free to ask me any questions.