Power steering electrical issues!
Thread Starter
i drive a zx2
Joined: Apr 2013
Posts: 23
Likes: 0
From: texas
Power steering electrical issues!
Howdy folks. I've been having issues with my power steering on a 2016 F-150 XLT crew cab that I just purchased. It has 142k miles. Power steering was intermittent when purchased, no codes or warnings on dash. it was 102 degrees F here in Texas.
BELT AND STEERING JOINT WERE GOOD
I did some testing and datalogging with Forscan and found the PSCM_INT_TEMP was the "issue" The temp would all of the sudden shoot up to 150 degrees and this triggers EPAS shutdown. I checked the wiring harness and connects, they looked good. I tried a reset and reprogram with no change. All of the angle and torque sensors appear to be working, and the issue happens when its hot outside, and the truck is also hot from running.
I decided at this point it had to be a transistor inside the PSCM so I replaced the rack with a reman unit. I am having the SAME ISSUE, so I am reaching out to see if anyone knows where the Internal temp of the PSCM is calculated from? I think I need to start there and find the issues. Maybe wiring, maybe body control? No idea at this point.
I will probably also make a youtube video.
The codes I have from Forscan are below. I reset the codes, and these are the same codes i got before.
U3000 - control module (:96) status (-08)
B1D23 - Overheat sensor
The new rack was properly programmed to match the factory part through forscan. The truck was down for about 1 month, and the weather cooled down alot. It wasn't until today when it was hot outside that the truck started acting up in the exact same way as before i replaced the rack.
I would really appreciate any insight as to how to temp values are calculated by the thermistor and how these values are communicated. It is scary and dangerous when the power steering locks up while driving in certain conditions.
BELT AND STEERING JOINT WERE GOOD
I did some testing and datalogging with Forscan and found the PSCM_INT_TEMP was the "issue" The temp would all of the sudden shoot up to 150 degrees and this triggers EPAS shutdown. I checked the wiring harness and connects, they looked good. I tried a reset and reprogram with no change. All of the angle and torque sensors appear to be working, and the issue happens when its hot outside, and the truck is also hot from running.
I decided at this point it had to be a transistor inside the PSCM so I replaced the rack with a reman unit. I am having the SAME ISSUE, so I am reaching out to see if anyone knows where the Internal temp of the PSCM is calculated from? I think I need to start there and find the issues. Maybe wiring, maybe body control? No idea at this point.
I will probably also make a youtube video.
The codes I have from Forscan are below. I reset the codes, and these are the same codes i got before.
U3000 - control module (:96) status (-08)
B1D23 - Overheat sensor
The new rack was properly programmed to match the factory part through forscan. The truck was down for about 1 month, and the weather cooled down alot. It wasn't until today when it was hot outside that the truck started acting up in the exact same way as before i replaced the rack.
I would really appreciate any insight as to how to temp values are calculated by the thermistor and how these values are communicated. It is scary and dangerous when the power steering locks up while driving in certain conditions.
Last edited by TheGageinator; Sep 30, 2024 at 06:14 PM.
5 Year Member
Joined: Nov 2018
Posts: 6,714
Likes: 3,933
From: Calgary, Alberta
The PSCM communicates via the HS2-CANbus.
U3000 can be issued by many different modules so I will assume the PSCM issued it.
U3000 - Control Module Failure - This DTC sets due to incomplete or improper PMI procedures.
Subtype :96 - Component internal falure - This subtype is used for failures where the control module has received an indication about the component that indicates a failure (e.g.: an intelligent actuator or sensor) is indicating an internal fault.
Diagnostic Aids: If there have been recent service actions with this module, repeat the PMI procedure as directed by the diagnostic scan tool.
I would try performing the PMI again. Make sure you have a charger connected to the battery to ensure proper voltage to the PSCM during the PMI procedure.
U3000 can be issued by many different modules so I will assume the PSCM issued it.
U3000 - Control Module Failure - This DTC sets due to incomplete or improper PMI procedures.
Subtype :96 - Component internal falure - This subtype is used for failures where the control module has received an indication about the component that indicates a failure (e.g.: an intelligent actuator or sensor) is indicating an internal fault.
Diagnostic Aids: If there have been recent service actions with this module, repeat the PMI procedure as directed by the diagnostic scan tool.
I would try performing the PMI again. Make sure you have a charger connected to the battery to ensure proper voltage to the PSCM during the PMI procedure.
5 Year Member
Joined: Nov 2018
Posts: 6,714
Likes: 3,933
From: Calgary, Alberta
I also found this. From the WSM:
B1D23 - Power Steering Overheat Sensor
Description: The Power Steering Control Module (PSCM) uses a thermistor to monitor the internal temperature of the Electronic Power Assist Steering (EPAS) gear. This Diagnostic Trouble Code (DTC) appearing by itself does not indicate a fault condition in the steering system.
Possible Causes:
B1D23 - Power Steering Overheat Sensor
Description: The Power Steering Control Module (PSCM) uses a thermistor to monitor the internal temperature of the Electronic Power Assist Steering (EPAS) gear. This Diagnostic Trouble Code (DTC) appearing by itself does not indicate a fault condition in the steering system.
Possible Causes:
- Heat shield missing
- Heavy loads on the Electronic Power Assist Steering (EPAS) gear
- Excessive ambient temperature
Thread Starter
i drive a zx2
Joined: Apr 2013
Posts: 23
Likes: 0
From: texas
I reset all modules and went for another drive today. Got the same issue intermittently throughout my 100 miles drive (not fun) I will post a YouTube video soon with some info on what I can see with Forscan. So far, the only indicator of any issue is a spike in PSCM internal temp. None of the other 19 PCSM related pids are showing my any indications of failures r reading spikes. I can provably post a log of that if anyone is interested in seeing the data logged failure
Thread Starter
i drive a zx2
Joined: Apr 2013
Posts: 23
Likes: 0
From: texas
I called and talked to BBB Industries about in depth operation and diagnostics of the EPAS system. Troubleshooting determined the reman steering rack is BAD! Super frustrating. It is under warranty, and I have another on the way. I will keep updating in case someone else has this issue.
5 Year Member
Joined: Nov 2018
Posts: 6,714
Likes: 3,933
From: Calgary, Alberta
I called and talked to BBB Industries about in depth operation and diagnostics of the EPAS system. Troubleshooting determined the reman steering rack is BAD! Super frustrating. It is under warranty, and I have another on the way. I will keep updating in case someone else has this issue.