C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Service ASR light

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Old Aug 13, 2006 | 08:17 PM
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Default Service ASR light

I have a 92 and the service ASR light comes on during normal driving. I have new brakes, have checked the brake fluid level and bleed the brakes. Any suggestions? Thanks!
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Old Aug 13, 2006 | 09:04 PM
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paperclip and get the codes, then go from there. check the tps too. there is alot involved in the asr system!
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Old Aug 13, 2006 | 09:46 PM
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Originally Posted by Steve&Barbara
I have a 92 and the service ASR light comes on during normal driving. I have new brakes, have checked the brake fluid level and bleed the brakes. Any suggestions? Thanks!
I just had the service ASR light light up on my '95 last week, and did some research searching the forum archives about the issue. I made myself a checklist of things to check that might cause it, after reading some of the archived posts from others it happened to. Also, it seems more frequent of an issue on 92's and 93's, and '96's don't seem to have it much at all. Here's the rather lame checklist I wrote up:

1. Check brake fluid level.
2. Check wire connections @ ASR unit behind driver seat
3. Could be TPS (high idle?)
4. Check for vac leaks, including @ brake booster (high idle)
5. Check ground wires for ECM, tach filter (star washer on passenger side front of block or head)
6. Check: cruise ctrl switch in on position?

My '95, however, doesn't have a tach filter that I can find. However your '92 does, and after the long search for mine, I can tell you exactly where yorus is: It is a small box shaped attachment on the wiring harness near the area of the power steering fluid reservoir. It should be piggybacking on the wiring harness with a white wire coming out of each end. It may not be your tach filter causing the problem but in case it is, now you know where to find it

Here's an archived post about it happening on someone else's '92:

http://forums.corvetteforum.com/show....php?t=1186592
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Old Aug 14, 2006 | 12:41 AM
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My '95, however, doesn't have a tach filter that I can find. However your '92 does, and after the long search for mine, I can tell you exactly where yorus is: It is a small box shaped attachment on the wiring harness near the area of the power steering fluid reservoir. It should be piggybacking on the wiring harness with a white wire coming out of each end. It may not be your tach filter causing the problem but in case it is, now you know where to find it

ur 95 should have one! look around the coil connections and the leads to the coolant temp sensor, should be there
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Old Aug 14, 2006 | 06:45 PM
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Originally Posted by merlot566jka
ur 95 should have one! look around the coil connections and the leads to the coolant temp sensor, should be there
Its not. Another forum member even emailed me a schematic from the Factory Service Manual for 1995 that shows it on the wiring harness where the harness runs near the power steering fluid reservoir, but there is definitely not one piggybacking on my harness anywhere along the entire visible length.
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