Help! I just acquired a 1995 Corvette and it has “Service ASR System” and “ASR OFF” lights on the dash. The only kicker is as soon as I start the car, the light is off, but as soon as I blip the throttle, they both come on.

I’ve done some searching on this topic and found no solutions yet. I filled the brake fluid reservoir up and I’ve checked the wiring on the car. No dice yet. No codes have popped up checking with two different scanners, so I’m lost at the moment on this.

The previous owner claims it’s from the SLP cold air intake that’s on the car. Is there any chance of this causing this light? I figure maybe if the air flow sensor is seeing less restricted air flow compared to the throttle position, then maybe the computer is seeing a discrepancy with the system. This seems like a long shot to me though, but I don’t have the original intake so I can’t test this.

Long story short though, I’m not that worried about the system not working properly because I’ve heard it’s really not that great. However, I would like to get the light off my dash. Has anyone had the same issue before and know what could be causing it? If it’s due to the intake, likely just going to pull the bulbs out. Any guidance is greatly appreciated!

Thank you!

 

The ASR problem is not from the SLP cold air intake. You should scan for codes it may be the TPS sensor or sensor circuit but check the factory shop manual and go through the steps to properly diagnose it.

 

I need to get me one of those manuals. I may retrace the red wire from under the battery to the rear of the car. I found one more forum that mentioned it could be broken but hidden fairly well.

I scanned for codes twice and didn’t have any pop up unfortunately.

 

Off the shelf scanners typically will not read chassis codes. Get a correct tool or learn the procedure using the CCM.

 

Do you have a suggestion for a good scan tool for this? I went with the Walmart special for $20 and then a nice scanner, but I can’t remember the brand.

 

Tech1, Tech2. Several others from snapon.


https://tech.corvettecentral.com/201...trouble-codes/

ABS/ASR is the last one mentioned.

 

I'd ck the TPS sensor voltage. At idle it should be around .052v. Maybe the previous owner messed with the throttle body.

 

This is something I was also considering given the symptoms of it all. And this is easy enough to check to rule this issue out if need be. Thanks for the tip.

 

There is no adjustment for the LT1 TPS. However, if you have a scan tool hooked up and see that the TPS is not where you want it hen you can oblong the holes and adjust it to where you want it.

 

Got the opportunity to check the TPS, 0.60 at idle, about 4.11 at WOT. I don’t think it’s an issue with the TPS.

I did also get the opportunity to check for codes. Got code H64 and H65 on module 9. I disconnected the battery the other day and I’m assuming these codes are not old, as I’ve had this issue since I bought it.

I looked up H64 and H65 and it appears to be:

H64: right bank 2 lean
H65: right bank 2 rich

I’m assuming this means my right O2 sensor is no good since I’m getting both codes. Could this be the issue with my ASR by chance? I know module 9 is ABS/ASR, but why would it throw a lean/rich O2 sensor code in that module? My understanding of the codes is elementary as the last Vette I had and actually did codes on was a 1987, just checking SES flashes.

Any guidance helps! Thank you!

 

I would also like to add that this car does have a Corsa sport exhaust installed. I am also doubtful of this causing the issue, however I am unsure if there are more O2 sensors past the cats on this model year. I don’t have a way to get under the car and really check.

 

Why are you looking at the results for ECM codes when you need to be looking at ABS?

 

This is what I was missing while searching last night. I thought something seemed amiss while trying to find these codes. Thank you for sending those pages to me, still waiting on a FSM. I will go through these circuits and try to find the issue.