SWPS issue diagnosis
Thread Starter
Intermediate
Joined: Oct 2025
Posts: 27
Likes: 1
SWPS issue diagnosis
Alright, yet another Steering wheel position sensor thread haha. So I've been getting codes 1287 and 1288 for a while now. I resoldered mt y ebcm per the standard practice and these codes were still present, but did get rid of 1214 code. Before and after the repair I still was getting a intermittent code for 1287/1288 which would cause short term abs activation and make the car swerve.
So I replaced the swps with a new one from standard motor products. It seemed at first to be fixed but now my code comes back in a different type of manner, typically within the first couple minutes of driving, sometimes before i even start moving the vehicle. And it usually is a current code, not history with the previous sensor.
So i took some measurements of the voltage to the signal pins (b/t blue and green wires). See video below. It usually shows about 2.5 V at center and then goes to around 2V 90 degrees either way. But I did notice that it goes almost to zero randomly. Is this normal? What are the expected voltages at the various steering wheel angles?
https://youtube.com/shorts/oqUUh3LYmho?si=dTCGc5ABvbynFXqy
Let me know if the video link works?
So I replaced the swps with a new one from standard motor products. It seemed at first to be fixed but now my code comes back in a different type of manner, typically within the first couple minutes of driving, sometimes before i even start moving the vehicle. And it usually is a current code, not history with the previous sensor.
So i took some measurements of the voltage to the signal pins (b/t blue and green wires). See video below. It usually shows about 2.5 V at center and then goes to around 2V 90 degrees either way. But I did notice that it goes almost to zero randomly. Is this normal? What are the expected voltages at the various steering wheel angles?
https://youtube.com/shorts/oqUUh3LYmho?si=dTCGc5ABvbynFXqy
Let me know if the video link works?
Drifting
Joined: Nov 2017
Posts: 1,391
Likes: 302
This thread has some info about SWPS signals, it might be interesting:
https://www.corvetteforum.com/forums...ts-needed.html
https://www.corvetteforum.com/forums...ts-needed.html
