Friends PCM back from Tuner and electronic throttle control not working?

[David Borden]

A friend just got his PCM back from a tuner and his Electronic Throttle Control is no longer working. This is on a 2002 C5 PCM. The only thing that the tuner said he changed was the Column lock was set to "not fitted" and the FailFuelCut VSS value was set to 255mph(from 2mph).

Would the change to the FFC VSS affect ETC? I told him I would ask here to see if you guys might have any clue what change on the PCM might disable the ETC?

The car ran fine before he sent the PCM off. Im trying to help him out and find the problem. He's a GM parts manager and has replaced a bunch of parts and he thinks a change to the PCM caused the problem.

I tried searching but was unable to find anything that seemed related.(he's close, so we thought we would try and solve it before sending the PCM back across country)

Any tips?
David

[jimmyblue]

It looks to me like a lot of use is being made of the
Camaro, van, truck OS for other platforms and it
might be possible that a mail order tuner started
with a "canned tune" from a cable throttle platform
by mistake?

I'd look at the OS info that comes back and see if
it is different than the PCM that was sent out.

[gmforlife]

yah it kinda sounds like an OS that doesn't have ETC

[David Borden]

OS is 12593358. Pretty certain its a 2002 C5 LS6 OS.

Is there any parameter I could check in the above OS that could affect the ETC functionality?

David

[5_Liter_Eater]

Can you post the tune?

[David Borden]

Here you go. I took his program and did a write entire to my PCM/Car and I also got zero throttle response... so its definately something in the programming and not wiring/hardware.

Appreciate any assistance you can provide.

David

[5_Liter_Eater]

No tune in that post eh...

[David Borden]

should be there now

[5_Liter_Eater]

Yea, thats a tune from an '02 vette. You got me. Could try re-flashing back to stock and see if it works again.

[EC_Tune]

Here's a stock 02 Z06 file: Verified fresh off the Tech2.

[mowton]

Did notice that P0121-123 and 1121, 1122 (TPS) DTC reporting is disabled in the posted tune?

[David Borden]

The next thing I tried was to do a compare log and copy over all the tables to a known working 2002 OS. After doing this, the car started and the throttle worked fine, so its probably not a table that is available in the compare log.

I checked the P0121-123 and 1121, 1122 and they are the same as a known working car, so thats probably not it.. but thanks for the tip...

David