ASC light still comes on after DTC codes disabled, any ideas?
Evolved Member
Joined: Oct 2008
Posts: 854
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From: St Louis
Correct, that is not this case.
When I was battling this, it would occur every time I dropped down to 4th at 4500-5500 rpm and nailed it. Boost would spike to 32 psi and about 310 load, and the ASC + Service Required light would come on and would not go off until I turned the ignition off. WGDC was not cut, throttle was not cut, and timing was not cut during this. No codes stored on the ECM.
Boost limit was above 310 and the threshold was set to 2000 ms, so it wasn't that. I tweaked both the airflow limit and torque limit tables as well to some success. I ended up truly fixing it by tweaking the wastegate tables quite a bit to prevent that boost spike. I did have all of the airflow and torque codes disabled, so I figured this is what happens when you trigger one of those conditions while having the codes disabled. I assumed that because when I got hard torque cuts, the same would happen but with the hard cut and the CEL + code.
When I was battling this, it would occur every time I dropped down to 4th at 4500-5500 rpm and nailed it. Boost would spike to 32 psi and about 310 load, and the ASC + Service Required light would come on and would not go off until I turned the ignition off. WGDC was not cut, throttle was not cut, and timing was not cut during this. No codes stored on the ECM.
Boost limit was above 310 and the threshold was set to 2000 ms, so it wasn't that. I tweaked both the airflow limit and torque limit tables as well to some success. I ended up truly fixing it by tweaking the wastegate tables quite a bit to prevent that boost spike. I did have all of the airflow and torque codes disabled, so I figured this is what happens when you trigger one of those conditions while having the codes disabled. I assumed that because when I got hard torque cuts, the same would happen but with the hard cut and the CEL + code.
Newbie
Joined: Mar 2009
Posts: 28
Likes: 0
From: Australia
Correct, that is not this case.
When I was battling this, it would occur every time I dropped down to 4th at 4500-5500 rpm and nailed it. Boost would spike to 32 psi and about 310 load, and the ASC + Service Required light would come on and would not go off until I turned the ignition off. WGDC was not cut, throttle was not cut, and timing was not cut during this. No codes stored on the ECM.
Boost limit was above 310 and the threshold was set to 2000 ms, so it wasn't that. I tweaked both the airflow limit and torque limit tables as well to some success. I ended up truly fixing it by tweaking the wastegate tables quite a bit to prevent that boost spike. I did have all of the airflow and torque codes disabled, so I figured this is what happens when you trigger one of those conditions while having the codes disabled. I assumed that because when I got hard torque cuts, the same would happen but with the hard cut and the CEL + code.
When I was battling this, it would occur every time I dropped down to 4th at 4500-5500 rpm and nailed it. Boost would spike to 32 psi and about 310 load, and the ASC + Service Required light would come on and would not go off until I turned the ignition off. WGDC was not cut, throttle was not cut, and timing was not cut during this. No codes stored on the ECM.
Boost limit was above 310 and the threshold was set to 2000 ms, so it wasn't that. I tweaked both the airflow limit and torque limit tables as well to some success. I ended up truly fixing it by tweaking the wastegate tables quite a bit to prevent that boost spike. I did have all of the airflow and torque codes disabled, so I figured this is what happens when you trigger one of those conditions while having the codes disabled. I assumed that because when I got hard torque cuts, the same would happen but with the hard cut and the CEL + code.
hmmmm
any updates??
I got the same problem, only difference is that I'm tuning my car at 32 psi, thus still getting the ASC light. Any one got their car running 32+ psi without this issue?
Try raising your boost limit and target tables, what are your support mods to run 32 psi?
Hopefully something really high. (race/E-85)
Read the recent activity in the DTC disable thread. Tephra and myself are looking into this. I just got the codes pulled from the dealership yesterday.
It does look like the tables need to be accurate even if you have the DTC disable. The disable simply allows the car not to go into limp mode, but since the ASC module can't communicate properly with the ECU and the tables are off it throws this code.
Hopefully Tephra can think of something sneaky for this. I am going to try and get my tables redone soon to see if it fixes this.
Read the recent activity in the DTC disable thread. Tephra and myself are looking into this. I just got the codes pulled from the dealership yesterday.
It does look like the tables need to be accurate even if you have the DTC disable. The disable simply allows the car not to go into limp mode, but since the ASC module can't communicate properly with the ECU and the tables are off it throws this code.
Hopefully Tephra can think of something sneaky for this. I am going to try and get my tables redone soon to see if it fixes this.
sorry to bring this back from the dead, but i went opensource about 2 weeks ago. I had the ASC light come on for the first time today. I am tuned to 24.5 psi, and this seems to happen around 3rd gear and above WOT.
So is this cause due to boost spikes, or to much tq or what? I don't loose power or anything, just get the ASC light till i turn off my car.
So is this cause due to boost spikes, or to much tq or what? I don't loose power or anything, just get the ASC light till i turn off my car.
Yeah I saw your fix thread, but I don't want to be spiking that high. I sent an email to Chad at cbrd to see if he could just fix it quick via email. I am going to go get some logs today, just got to find a safe place to do it. I will pm it to you when I get it. Thanks tephra!
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