TAC module question
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TECH Regular
Joined: Oct 2009
Posts: 482
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From: Whitehall,PA
TAC module question I feel like this is a stupid question,but I will ask anyway. I had my swap up and running and went for a short ride and the the pedal went dead. Shut it off and restarted it and everything was fine. I had this happen once before. My question is are these TAC modules that sensitive to vibration? I have it just sitting in the dash where the factory stereo was. I guess I will try and find a spot to mount it.
If the throttle stopped working, see if it set a code. This code can tell you a lot.
Also, the TAC module and PCM need to power up and down together. Make sure they are on the same key hot circuit from ignition switch or relay. I usually put them on the same fuse to avoid any communication issues between the two.
On the gas pedal with metal mounting bracket, I have seen issues with warping the assembly causing slight changes to the voltage coming out of the accelerator pedal position sensor (APP) I have found you can shim under the arm for the gas pedal to keep it from fully returning, (keeps voltage higher) The PCM/TAC seems to 'learn' minimum position if you key on and off a few times. I've got a few pedals in my shop now that if I install them as is, will set codes every time. Put a penny under the stop and they work great.
Also, the TAC module and PCM need to power up and down together. Make sure they are on the same key hot circuit from ignition switch or relay. I usually put them on the same fuse to avoid any communication issues between the two.
On the gas pedal with metal mounting bracket, I have seen issues with warping the assembly causing slight changes to the voltage coming out of the accelerator pedal position sensor (APP) I have found you can shim under the arm for the gas pedal to keep it from fully returning, (keeps voltage higher) The PCM/TAC seems to 'learn' minimum position if you key on and off a few times. I've got a few pedals in my shop now that if I install them as is, will set codes every time. Put a penny under the stop and they work great.
I have had problems after storage over the winter. I suspect a little corrosion/dust in the pedal position sensor shuts it down. A few pumps on the pedal and reset, it's fine for the season.
