Why the Steering Assist is all the time reduced?

PAWEL_N

MEMBER
2016 CADILLAC ESCALADE ESV
6.2L
V8
4WD
AUTOMATIC
50,000 MILES

Hello,

We have the last problem with the Steering Assist. The car is repaired after a front car accident. There are all faulty items are fixed, but the Steering Assist works as reduced option. We replaced the old steering gear (Rack and Pinion Gear) with a used steering gear but from 2018 year.
Is it possible that the second steering gear is not the same as the original 2016? Is possible to replace some electronics from old/original 2016 to used housing 2018?
Or is this message about reduced steering assist is normal, as a usually, well working system?
I am waiting for your help.
Have a nice day,
Pawel

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3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,648 POSTS

Hello Pawel,

We need to run the codes for the system which is done by using a CAN scanner. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here are the steering wiring diagrams so you can see how the system works. If the part numbers are the same for each rack you should be okay, but the steering rack must be programmed, and the steering angle sensor needs to be centered. Here is the correct way to replace the electronic steering rack and how to program the unit and center the angle sensor. I would also check the fuse #4 - 175 amp in the under-hood fuse panel Check out the images (below). Please let us know what happens.

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Monday, November 20th, 2023 AT 8:21 AM

PAWEL_N

MEMBER
173 POSTS

Thank you Ken for your reply.
I fix it. There was failture contact in connector AT wiring. After correction this contact by contact spray Steering Assist is working now.
Thank you.

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Tuesday, July 30th, 2024 AT 1:31 AM

KEN L