Ecm role expanding? (DBW)

[Chipsbyal at aol.com]

The Vette does use drive by wire, started in 97 with the C5. I've drove and 
repaired a few of these. If I didn't tell you it was drive by wire, you 
probably couldn't tell. The system uses a "TAC" module (throttle actuator 
control) to operate the throttle body. This setup eliminates the need for a 
throttle cable, cruise control cable and necessary hardware, IAC valve, and 
all of the traction control pieces. So there is a pricey TPS your foot is on, 
a TAC module and an electric throttle body. The most trouble I've had with 
them is not perfect connections between the PCM and TAC modules. Incidentally 
both are mounted directly beneath the battery on the passenger side frame 
rail. Other vehicles are also coming with this gadgetry as well. The new 
F-body, Silverado with traction control are among them. The 6.5 turbo diesel 
has had a similar setup since ~94. 
AL

www.ChipsByAl.com
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