Well the day kinda ended in disappointment my red river cable will only work with 94/95 scan program as of now. Winflash or eehack just won’t communicate with the 94 pcm. I tried everything tried different windows compatibility whe whole deal. Reinstalled drivers and all kinds of stuff. Short of making a bench set up idk what else to try.
Success! Started pulling fuses and the airbag/ccm ones did it. Specifically the ccm 3 is the one that does it. Well anyways she worked! Eehack kicks ass. I noticed I have a code 43 so I guess my solder mod for the knock sensor didn’t work, I’m goin to take it out of the ecu and try it in line. I’m getting a code 96 as well from the trans so I know I’m going to need to do the valve body but I’m very happy right now! Everything will come together soon.
You need to load a calibration from 1995 on the PCM for the transmission.
You sure you get code 96. Cant you just grab a knock sensor from 94-95 application and scrap that resistor mod.
Make sure on the settings window in eehack to select y-body connection.
Sorry that’s my bad it’s a code 97 for vss I jumped the gun. Yes I’m going to have to agree with you on the swapping the right knock sensor and ditching the resistor it’s just a more solid solution. I’ll pick one up tomorrow and see when I can use my buddy’s lift to swap it. All and all it seems to be working fine though. The bin I modified is a 95 bin so all the trans stuff is from there. Yes y body was set and it was silencing Aar and such but there was still to much chatter. Fuses pulled and it works fine I’ll live with it.
Well it could be that the ccm use different address or gm somehow switched something on the aldl line communication.
On the eehack`s main window there is a tab called raw. You can do an idle traffic scan log from there. I hope it will clear what is happening on the bus.
The 95 calibration you have should be vette specific, since there is some differences on the communication side and on the vss side, different tooth counts if I remember right.
I doubt they switched the vss sensor or the signal.
I used an original 95 y body bin as a base for the tune installed. From some reading I found the fault is from the pcm to the speedo. Not trans to pcm so I’m not to worried about it at the moment. I believe that the 95 cars just talk to the ccm differently and that’s what may be causing my issue. Maybe lol. Idk
Last edited by Lockdun1; 09-18-2018 at 07:21 PM.
Yes, that code has nothing to do with the valve body or the VSS sensor. Did the speedometer work?
The code is referring to a 4000 pulse per mile VSS output on the PCM used to drive the speedometer. It's a pull-down circuit, basically an open collector transistor. It needs the speedometer to have a pull-up resistor for it to work. You've probably lost that connection - maybe the pin pushed out of the connector or was damaged?
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