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C5 Open Discussion General and technical C5 Corvette discussion - ownership, maintenance, repairs, modifications, tuning |
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10-16-2010, 4:55pm | #1 | ||||||
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Service Traction System??
This message (service traction system) comes on the DIC when I cut on the Emergency flashers and Will stay on until I cut the car off, when I restart the car everything is normal and works fine as long as I don't use the flashers. Anyone seen this before or maybe is something getting ready to go out?
Edit: I have a history code of C1295 Brake Lamp Switch Circuit Open About 3 or 4 months back I changed the 3rd brake light to a LED one, could that have anything to do with it????
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10-20-2010, 5:56pm | #2 | ||||||
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Yes, they are all related.
I'm more inclined to think it may be a bad hazard switch, rather than the LED modification. There are effectively two stoplamp switches. The first one is the physical switch connected to the brake pedal, so it senses when brakes are normally applied and switches state. The signal out of this switch goes directly into the EBTCM. Looking at the schematic for the hazard wiring. It has an internal relay which is connected to the flasher module (also contained within the hazard switch), and the output from that relay is then connected to the output side of the pedal stoplamp switch (sent to EBTCM)...basically mimicking what the pedal switch does, but switching states electrically instead of physically. It is done this way because you are usually not depressing the brakes when your hazard lights are flashing, so the relay function is switching the stoplight switch on and off with the the brake lights. And it would be my guess as this is where the problem may be, since you didn't mention it occuring during normal brake application or when braking and using the turnsignals. And yes the C1295 code does toss the "service traction system" message, because it is prohibiting the EBTCM from changing states due to this problem detected. |
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10-20-2010, 6:17pm | #3 | ||||||
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i believe the factory 3rd brake light is already a l.e.d. unit
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10-20-2010, 6:31pm | #4 | ||||||
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Thanks for the good info, your are correct it doesn't happen during normal brake application or when braking and using the turnsignals.
I will check in to getting a new hazard switch
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10-20-2010, 6:39pm | #5 | ||||||
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I didn't know if it was or not, but if it is LED that would back up what Y2K thinks it is.
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10-20-2010, 7:38pm | #6 | ||||||
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it is a LED. Good luck with the repair.
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11-01-2010, 5:55pm | #7 | |||||||
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Quote:
I got my new hazard switch last week and finally had some time today to install it but it's still doing the same. I really thought this was going to fix it because if I keep my foot on the brake and then cut the hazards on it does not trigger the "service traction system" message until I take my foot off the brake which I thought fit in with what was being said in the above post. Could it have something to do with the switch connected to the brake pedal? I wish I still had my old 3rd brake light to put it back in to see if it does the same thing to at lest eliminate the new brake light. I'm open to any thoughts or ideas. thanks
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11-01-2010, 6:24pm | #8 | ||||||
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The new 3rd brake light is working right?
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11-01-2010, 6:35pm | #9 | ||||||
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Yes it works fine the old one did to it just had a couple of the lights out and it would not pass inspection.
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11-01-2010, 6:43pm | #10 | ||||||
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Do all the light swork when the flashers are on?
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11-02-2010, 8:07pm | #11 | ||||||
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