Post by
dmtaurus »
https://forums.nicoclub.com/dmtaurus-u295302.html
Tue Jun 15, 2021 2:11 pm
Well, here we go
Went to the Nissan dealer today and the first problem was getting into the ECU. The diagnostic equipment had trouble getting into the ECU. But after back-dooring the ECU, as the service manager explained, they were able to get into the ECU and re-flash it. So, did it fix the problem? NOOOOOOO!
So, one thing the service manager noticed was that it appeared that the wheel speed sensors had been replaced. I could not remember off-hand if they had been done. The service manager said they did not look like Nissan parts and that may be the reason that the system is not working right, even though he said they performed a trouble code check of the system and found no codes. He said that an after-market sensor may not have a proprietary function that an OE sensor has, and something such as that may be causing the system to malfunction.
After I left, I started thinking about this and yes, the each front wheel bearing was replaced with Moog bearings that included the sensors. And also, one time several years ago the driver-side, rear sensor was replaced, with a brand name sensor because it was working on/off and causing the ABS light to turn on. After that particular rear sensor replacement the ABS light has never come back on.
So, could after-market sensors be missing something that the OEM sensors have and that the ECU looks at?