Hey guys I recently got a c1377 code for capacitor so i swapped out the power supply in the trunk with 89680-33010 another one. Fired up the car and check parking brake light still there so I tried to do the relearn linear valve offset with techstream like I did when I had to replace the other brown brake module. Now the ABS VSC & BRAKE light is on!

Anyone ever run into this issue or have any insight? Im assuming linear valve offset cant be completed because theres still an issue with my parking brake so it threw those additional lights?

 

When I replaced my parking brake module there was a reset procedure within tech stream to clear the light. This was the module I replaced. It's fairly common for the one I replaced to be damaged by moisture. https://www.ebay.com/itm/154999223665
https://www.clublexus.com/forums/ls-...l#post10991217


I had that capacitor code a year ago but it cleared by itself. Is that a current fault or history? I think the parking brake system is independent of the regular brakes.

 

I replaced the same module 2 years ago with sucess just like you. I only had the additional abs vsc and brake after i tried repgrogramming the new power supply.

The parking brake and regular brakes maybe independent but the linear valve offset and i believe reset memory rely on the parking brake being engaged/disengaged

 

Would bad rear abs sensors cause linear valve procedure to fail?

 

I'm not familiar enough with the inner workings to answer your question. There is a certain sequence to follow to clear brake codes. I would start here.

https://www.clublexus.com/forums/ls-...-messages.html

 

I've tried this sequence but my rear speed sensors may be failing so Im assuming thats why linear valve offset may be failing.

 

Both rear speed sensors failing at the same time is very unlikely.

 

Thats my thought but my concern is even if its just 1 rear sensor would it affect linear valve calibration?

 

Yes it would