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28-TCS code C1225H

Joined
Aug 1, 2003
Messages
53
Location
FLOWERY BRANCH
Corvette
PURPLE PEARLE MET. 6SP
I recently started getting an Active Handling/ABS Warning Light. I pulled the codes and found a C1225H code. This indicates RF Excessive Wheel Speed Variation. Can anyone tell me exactly what this means and is it something I can check or do I need to take it in to the dealership. I just recently replaced the rotors,calipers and pads. Could this have anything to do with it?

Regards,

Mike
 

Chrisr

Well-known member
Joined
Aug 30, 2004
Messages
579
Location
Cinnaminson & Ocean City NJ
Corvette
'07 Monterey Red/Cashmere Vert
Hi BTDOG,
I'm not sure the code has anything to do with the work you performed. Reason being is that the "H" at the end of the code means "history'. Which means this happened before and is stored in the computer.

Go here: http://www.corvetteactioncenter.com/forums/showthread.php?t=72535

and read Patricks post on pulling the codes. At the bottom of his post is a link to a site that translates the codes. I found this extrmely helpful when I had my tires changes and the car threw about 10 codes!!!

Chris
 
Joined
Aug 1, 2003
Messages
53
Location
FLOWERY BRANCH
Corvette
PURPLE PEARLE MET. 6SP
Thanks for the response Chris. The code tranlates to (RF Excessive Wheel Speed Variation) whatever that means.

Mike
 
Joined
May 10, 2002
Messages
2,255
Location
Boise, Idaho
Corvette
2002 electron blue Z06
Thanks for the response Chris. The code tranlates to (RF Excessive Wheel Speed Variation) whatever that means.

Mike

Hang in there for a while. c4c5 specialist will likely see this. Or you could try sending him a PM.
 

c4c5specialist

Technical Advisor
Joined
May 29, 2001
Messages
3,682
Location
New Haven, Ct. USA
Corvette
Nope, but someday.
HI there,
I would recommend that you replace your wheel speed sensor harnesses in the front, even though only ONE wheel has set.
These flex over time and create erratic signals from the sensors to the EBTCM.
Readily available and if you can jack up your car, you can replace them yourself.
Allthebest, c4c5
 

silver98

Well-known member
Joined
Oct 21, 2004
Messages
202
Location
southeast PA
Corvette
1998 Sebring Silver Coupe
Before you replace the harness, check to ensure the connection is good. You may have bumped it while working with the calipers. Also, check the ground connectors, then, if you still have the issue, follow C4C5Specialists' advice.
 
Joined
Aug 1, 2003
Messages
53
Location
FLOWERY BRANCH
Corvette
PURPLE PEARLE MET. 6SP
Well after two months I finally got around to replacing the wheel speed sensor harnesses. Took it for a test drive and within a few miles the Active Handling/ABS Warning Lights returned. What is so weird is that when I reset both of these and turn the car off they may not come back on for another hundred miles or so.Very intermitant. c4c5specialist any Ideas? Or anyone else.

Regards,

Mike
 

c4c5specialist

Technical Advisor
Joined
May 29, 2001
Messages
3,682
Location
New Haven, Ct. USA
Corvette
Nope, but someday.
Hm, well, unfortunately, you can do one of 2 things from here.
Replace the right front wheel speed hub/sensor.
Or you can have your local dealership monitor the signals with a Tech 2 and see what exactly is going on.
Alltehbest,
 
F

fdxpilot

Guest
Take a close look at the connectors on your ABS speed sensors. Another forum had a thread showing pictures of connectors where the pins in the plug were loose and causing this condition. The pins were noticably out of place, compared to another connector and caused an intermittent condition.
 

TODD L GRIFFITH

Well-known member
Joined
Jul 12, 2001
Messages
1,120
Location
Middleboro, MA
Corvette
99' MR Coupe, 04' Silverado 03' ZO6 Sold
Here is a common problem with all C5's. I would check the two ground plugs behind the headlights located on the frame rail. These tend to corrode inside and throw out ABS and or, traction control codes out of the blue. The corrosion is the green/blue color.
These are the grounds for the PCM and BCM. G101 & G102. Moisture penetrates the plugs. All they need is a good cleaning with a wire brush. Check them on a regular basis.
Symptom: Cruising along at a steady speed then dash lights up like a christmas tree, and ABS or traction control message in the DIC. You may get a service vehicle soon message also.
 
Joined
Aug 1, 2003
Messages
53
Location
FLOWERY BRANCH
Corvette
PURPLE PEARLE MET. 6SP
Thanks Todd I will check it out this weekend. I really hope that's my problem.

Regards,

Mike
 

TODD L GRIFFITH

Well-known member
Joined
Jul 12, 2001
Messages
1,120
Location
Middleboro, MA
Corvette
99' MR Coupe, 04' Silverado 03' ZO6 Sold
Thanks Todd I will check it out this weekend. I really hope that's my problem.

Regards,

Mike
Bill Curlee who is the electrical guru at corvette forum brought this whole grounding issue to light. He said GM is aware of this problem with the grounds. Sometimes the chances of some remote sensor failing all of a sudden is "remote" hehe. Let me see if I can find a link for you to view pics. of the grounding plugs. http://forums.corvetteforum.com/showthread.php?t=896875&highlight=G102
Scroll down and view the pics. of the plugs.
 
Joined
Aug 1, 2003
Messages
53
Location
FLOWERY BRANCH
Corvette
PURPLE PEARLE MET. 6SP
Thanks that is a great link. I can't wait to check mine out this weekend. I will post what I find.

Regards,

Mike
 

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