Code B0 RFA U1064h
Thread Starter
Racer
Joined: Oct 2006
Posts: 298
Likes: 0
From: Churchville 18966 Pennsylvania
Code B0 RFA U1064h
Where is this problem?
I know it means Loss of communication, but, What does B0 RFA mean?
Right Front Axle ???
I'm dealing with an Service Active Handeling Alert and a 1288 code. If the code above is related, then it could be one of those wires near the right front wheel?
Help!
Alan
I know it means Loss of communication, but, What does B0 RFA mean?
Right Front Axle ???
I'm dealing with an Service Active Handeling Alert and a 1288 code. If the code above is related, then it could be one of those wires near the right front wheel?
Help!
Alan
Thread Starter
Racer
Joined: Oct 2006
Posts: 298
Likes: 0
From: Churchville 18966 Pennsylvania
Thanks guys. I've tried clearing that code, but, it always returns. Tire pressure still registers on all4 wheels, Hatch lid pops from the key fob and doors lock and unlock from the fob ?????
after turning the steering wheel right to left and left to right all the way to lock, the 1288 code seems to stay away longer....that code with the Service Active Handling message come on with a good bump so maybe its a ground problem. I'll start cleaning today....wish me luck.
after turning the steering wheel right to left and left to right all the way to lock, the 1288 code seems to stay away longer....that code with the Service Active Handling message come on with a good bump so maybe its a ground problem. I'll start cleaning today....wish me luck.
Race Director
Joined: May 2012
Posts: 15,731
Likes: 3,254
From: Phoenix area, AZ
Or it's a problem with the wires leading to the ABS sensor on the wheel hub. Check to make sure all are secure and not cut.
Tech Contributor
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
Race Director
Joined: May 2012
Posts: 15,731
Likes: 3,254
From: Phoenix area, AZ
Just a guess because of the Service Active Handling indicator coming on when he hit bumps. I had a similar incident in the past and it turned out to be the wiring leading to the ABS sensor. I'm not necessarily saying it's a cause of the 1288 code, but the indicator coming on could be the result of a wiring issue. It doesn't hurt to check; I've seen stranger things happen.
Tech Contributor
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
Just a guess because of the Service Active Handling indicator coming on when he hit bumps. I had a similar incident in the past and it turned out to be the wiring leading to the ABS sensor. I'm not necessarily saying it's a cause of the 1288 code, but the indicator coming on could be the result of a wiring issue. It doesn't hurt to check; I've seen stranger things happen.
1) ABS and TCS stay working, A/H is disabled
2) Indicators in IPC turn on
3) DIC message displays : "Service Active HNDLG Service Vehicle Soon"
If you don't have a full understanding of the system, it does not help those troubleshooting.....rather...it can send them on a wild goose chase. Not trying to give you a hard time here, but try hanging out and reading a while....instead of posting "guesses".
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Pro
Joined: Oct 2009
Posts: 560
Likes: 3
From: Centennial Colorado
RFA: Remote Function Actuation system allows transmitter remote contol of various vehicle systems without physical actuation of the switches. The RFA does not directly control system functions, but uses the BCM, or DCMs to intiate system functions.
DTC U1064: Loss of communication with the BCM
Each system on the serial data line is assigned its own recognition code which is used to identify which system is communicating. Systems periodically send SOH (state of health) messages to other systems via the BCM. If no response is received by those systems a corresponding DTC will be set, and any system that connot communicate properly will set the corresponding DTC. DTC U1064 will set when IPC has sent a SOH message to the BCM and no SOH response is sent back for 5 seconds...No driver warning message will be displayed. DTC U1064 requires an ignition cycle to change form current to history, and if the problem no longer exists, the history DTC will clear after 50 consecutive ignition cycles or a scan tool is used to clear the code.
DTC C 1288: Steering Sensor Circuit Malfunction
The steering wheel position sensor provides the EBTCM wih a voltage of 0.2-4.8 volts depending on steering wheel angle. The DTC will set when the voltage is out of range, and the ABS/TCS will be disabled. The ABS and TCS indicator lights will illuminate.
The malfunction can be caused by a short or open steering wheel position sensor circuit. Inspect the wiring and connectors.
The loss of comms with RFA may impact TCS IF ABS/TCS is disabled from the C1288 code.
DTC U1064: Loss of communication with the BCM
Each system on the serial data line is assigned its own recognition code which is used to identify which system is communicating. Systems periodically send SOH (state of health) messages to other systems via the BCM. If no response is received by those systems a corresponding DTC will be set, and any system that connot communicate properly will set the corresponding DTC. DTC U1064 will set when IPC has sent a SOH message to the BCM and no SOH response is sent back for 5 seconds...No driver warning message will be displayed. DTC U1064 requires an ignition cycle to change form current to history, and if the problem no longer exists, the history DTC will clear after 50 consecutive ignition cycles or a scan tool is used to clear the code.
DTC C 1288: Steering Sensor Circuit Malfunction
The steering wheel position sensor provides the EBTCM wih a voltage of 0.2-4.8 volts depending on steering wheel angle. The DTC will set when the voltage is out of range, and the ABS/TCS will be disabled. The ABS and TCS indicator lights will illuminate.
The malfunction can be caused by a short or open steering wheel position sensor circuit. Inspect the wiring and connectors.
The loss of comms with RFA may impact TCS IF ABS/TCS is disabled from the C1288 code.
Drifting
Joined: Feb 2008
Posts: 1,596
Likes: 67
From: Bahama North Carolina
Thanks guys. I've tried clearing that code, but, it always returns. Tire pressure still registers on all4 wheels, Hatch lid pops from the key fob and doors lock and unlock from the fob ?????
after turning the steering wheel right to left and left to right all the way to lock, the 1288 code seems to stay away longer....that code with the Service Active Handling message come on with a good bump so maybe its a ground problem. I'll start cleaning today....wish me luck.
after turning the steering wheel right to left and left to right all the way to lock, the 1288 code seems to stay away longer....that code with the Service Active Handling message come on with a good bump so maybe its a ground problem. I'll start cleaning today....wish me luck.
Tech Contributor
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
Pro
Joined: Oct 2009
Posts: 560
Likes: 3
From: Centennial Colorado
my bad..
Race Director
Joined: May 2012
Posts: 15,731
Likes: 3,254
From: Phoenix area, AZ
Three things happen in concert with a C1288 code:
1) ABS and TCS stay working, A/H is disabled
2) Indicators in IPC turn on
3) DIC message displays : "Service Active HNDLG Service Vehicle Soon"
If you don't have a full understanding of the system, it does not help those troubleshooting.....rather...it can send them on a wild goose chase. Not trying to give you a hard time here, but try hanging out and reading a while....instead of posting "guesses".
1) ABS and TCS stay working, A/H is disabled
2) Indicators in IPC turn on
3) DIC message displays : "Service Active HNDLG Service Vehicle Soon"
If you don't have a full understanding of the system, it does not help those troubleshooting.....rather...it can send them on a wild goose chase. Not trying to give you a hard time here, but try hanging out and reading a while....instead of posting "guesses".
Occam's Razor. If you're not familiar with the term you should look it up instead of saying someone who was trying to be helpful should just shut up and pay attention.
Tech Contributor
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
I never stated that you should "shut up, and pay attention".....rather, have an understanding of what you are talking about, coupled with specific experience, to help someone solve a specific problem. Guessing does not help anyone.......period.
So you not only read my post wrong, and then regurgitated it in what you think it meant, so I can only surmise that you are a woman. That being said, I will be more careful in my phrasing when addressing you.
Race Director
Joined: May 2012
Posts: 15,731
Likes: 3,254
From: Phoenix area, AZ
"The simplest of two or more competing theories is preferable and that an explanation for unknown phenomena should first be attempted in terms of what is already known."
Once the probable has been ruled out, the simplest of the improbable is most likely the answer. I provided the simplest of the improbable, since it has already proven to be the correct answer in my case, and not a guess. Improbable does not mean impossible.
And yeah, there's all kinds of women going by the name Ed.
Tech Contributor
Joined: Jan 2007
Posts: 19,246
Likes: 1,092
From: Dyer, IN
That's only part of its application, and not it's full meaning.
"The simplest of two or more competing theories is preferable and that an explanation for unknown phenomena should first be attempted in terms of what is already known."
Once the probable has been ruled out, the simplest of the improbable is most likely the answer. I provided the simplest of the improbable, since it has already proven to be the correct answer in my case, and not a guess. Improbable does not mean impossible.
And yeah, there's all kinds of women going by the name Ed.
"The simplest of two or more competing theories is preferable and that an explanation for unknown phenomena should first be attempted in terms of what is already known."
Once the probable has been ruled out, the simplest of the improbable is most likely the answer. I provided the simplest of the improbable, since it has already proven to be the correct answer in my case, and not a guess. Improbable does not mean impossible.
And yeah, there's all kinds of women going by the name Ed.
Ok then..........shut up, and pay attention.