2003 F55 C0579 code?
Thread Starter
Instructor
Joined: Jul 2021
Posts: 209
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From: Erie PA
2003 F55 C0579 code?
Also get service ride control message, and 80mph limit. This would come on at startup last fall, I had the battery out all winter, put it back in and still have this code.
All new shocks and I am certain I connected the wires at that time, pretty sure wires are still connected, but I haven't had the time to actually jack it up and look it over really well.
Since it comes up as LF solenoid circuit open on some 'sites, but RF suspension actuator circuit on others, I'm confused as to which is correct.
If it matters, I replaced the LF TPMS and forgot to reset it, but I did that and it works now.
Could this be something as simple as a fuse?
Thanks for any and all advice.
All new shocks and I am certain I connected the wires at that time, pretty sure wires are still connected, but I haven't had the time to actually jack it up and look it over really well.
Since it comes up as LF solenoid circuit open on some 'sites, but RF suspension actuator circuit on others, I'm confused as to which is correct.
If it matters, I replaced the LF TPMS and forgot to reset it, but I did that and it works now.
Could this be something as simple as a fuse?
Thanks for any and all advice.
Thread Starter
Instructor
Joined: Jul 2021
Posts: 209
Likes: 86
From: Erie PA
I guess it could be, but I would think other systems would also be affected.
I did look over the wiring and verified that the connections were good at the shock. I even pulled the overflow tank off the fender so I could get a good look at that side. I could see no problems.
I also checked the suspension level indicators and wiring, they all looked good.
I did look over the wiring and verified that the connections were good at the shock. I even pulled the overflow tank off the fender so I could get a good look at that side. I could see no problems.
I also checked the suspension level indicators and wiring, they all looked good.
Drifting
Joined: Mar 2018
Posts: 1,364
Likes: 414
From: New Jersey
I guess it could be, but I would think other systems would also be affected.
I did look over the wiring and verified that the connections were good at the shock. I even pulled the overflow tank off the fender so I could get a good look at that side. I could see no problems.
I also checked the suspension level indicators and wiring, they all looked good.
I did look over the wiring and verified that the connections were good at the shock. I even pulled the overflow tank off the fender so I could get a good look at that side. I could see no problems.
I also checked the suspension level indicators and wiring, they all looked good.
Thread Starter
Instructor
Joined: Jul 2021
Posts: 209
Likes: 86
From: Erie PA
Thank you, I should have thought of swapping them.
I'll also try getting a volt/ohm reading at each side.
I have the front up on jacks now getting ready to replace clutch master, so swapping the shocks will be easy.
I'll also try getting a volt/ohm reading at each side.
I have the front up on jacks now getting ready to replace clutch master, so swapping the shocks will be easy.
3rd Gear
Joined: Apr 2022
Posts: 3
Likes: 0
Greetings. Did you get this sorted out? I replaced my front two magnetic shocks with the correct (and expensive) OEM replacements. Was getting no codes with the leaky and worn stockers, but now have C0579 and C0584 (open circuits on both fronts). The codes pop up pretty quickly after starting the car. The connections up top appear to be intact. I’m pulling my hair out!
Thread Starter
Instructor
Joined: Jul 2021
Posts: 209
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From: Erie PA
I have not had the chance to swap them out yet. Planning to do it later this week.
Working on clutch master replace right now.
12 hour work days aren't fun, but it is how I could afford the 'Vette in the first place.
Working on clutch master replace right now.
12 hour work days aren't fun, but it is how I could afford the 'Vette in the first place.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,319
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From: Cape Coral, Florida
Greetings. Did you get this sorted out? I replaced my front two magnetic shocks with the correct (and expensive) OEM replacements. Was getting no codes with the leaky and worn stockers, but now have C0579 and C0584 (open circuits on both fronts). The codes pop up pretty quickly after starting the car. The connections up top appear to be intact. I’m pulling my hair out!
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Thread Starter
Instructor
Joined: Jul 2021
Posts: 209
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From: Erie PA
First off WELCOME to the Forum and second PLEASE fill out your profile...model year, mods, tune etc...there are sometimes wiring differences model year to model year...on your "new" shocks you can check the resistance using an ohm meter between the two shock terminals...you should see 9.5-15.5 ohms...if the resistance is good there is power coming into each shock so you can check that key ON...RF is a light blue wire on pin C12 at the ESC module...the LF is a gray wire on pin D12...now the ground is a pulse width modulated (PWM) ground and is controlled by the ESC module...you would need a bi directional scan tool to command the ESC to ground the circuit and you can check that with a test light OR a test light between each 2 pins...this way you check the power and the ground at the same time...if you need the pin out for those pin locations I can pass them along.
1st Gear
Joined: Apr 2022
Posts: 2
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From: Germany, Hamburg Area
I would really like to know, how you proceed on this fault C0579. I do have the same fault on the C5 I just bought. The older previous owner had installed 4 new original shocks, about 2000 miles ago. Unfortunately he is not alive any more...
My next step would be to check/ measure the wiring from the shock to the ESC module. TheC0579 fault is explained quite good in the manual you might have downloaded here on the forum: https://www.corvetteforum.com/forums...e-manuals.html. >> Electronic Suspension.pdf
My next step would be to check/ measure the wiring from the shock to the ESC module. TheC0579 fault is explained quite good in the manual you might have downloaded here on the forum: https://www.corvetteforum.com/forums...e-manuals.html. >> Electronic Suspension.pdf
Thread Starter
Instructor
Joined: Jul 2021
Posts: 209
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From: Erie PA
I gave up on it and am going to Z06 shocks. This does require a "deletion" of the F45 system in the computer, which requires a Tech2 programmer.
A decent automotive electrician could probably trace the wires, test the components, and find the problem, but I think that would be costly.
A decent automotive electrician could probably trace the wires, test the components, and find the problem, but I think that would be costly.
3rd Gear
Joined: Apr 2022
Posts: 3
Likes: 0
Thanks for the info. My car is a mostly stock (Borla Atak x-pipe/axle-back) ‘04. The ‘04, supposedly being a weird bird on this, is the reason that I bought the expensive replacements. Was getting zero codes before removing the (completely worn out) factory shocks. I replaced shocks and both upper connectors with original GM stuff. The car now rides insanely better, but I’m getting these codes after installing the new stuff. I’ve basically narrowed it down to being bad new shocks. I now intend to just get a Tech 2 guru to delete the F55 system from the car, allowing me to put whatever shocks on it that I choose, and removing future headaches with this fussy system that I really don’t give a rip about anyway.
Drifting
Joined: Mar 2018
Posts: 1,364
Likes: 414
From: New Jersey
Thanks for the info. My car is a mostly stock (Borla Atak x-pipe/axle-back) ‘04. The ‘04, supposedly being a weird bird on this, is the reason that I bought the expensive replacements. Was getting zero codes before removing the (completely worn out) factory shocks. I replaced shocks and both upper connectors with original GM stuff. The car now rides insanely better, but I’m getting these codes after installing the new stuff. I’ve basically narrowed it down to being bad new shocks. I now intend to just get a Tech 2 guru to delete the F55 system from the car, allowing me to put whatever shocks on it that I choose, and removing future headaches with this fussy system that I really don’t give a rip about anyway.
3rd Gear
Joined: Apr 2022
Posts: 3
Likes: 0
Connectors were good before, but had oil on them from original shocks leaking (yet still no codes). There was really no wiring required, as they just snap onto the connector from the factory harness. I intend to get refunded for the shocks and go back with C6 shocks, or something similar.