I purchased a RacePak G2X data logger last week and decided to tap into the DME wiring for RPM and TPS. So, today I started the wire tapping portion of the installation with the help of a friend and the articles from Consolidated and K-Mans.
Doing electrical work the first time, I had to be careful and kept planning two-three steps ahead, one step back type thing, took me a good 2 hours.
Taped in E6-RPM (green/blue, looks either 18 or 22AWG) and D13-TPS (violet, was thicker than E6). Verified that I did the connection properly using a multimeter and registered resistens (ohms). I could not figure out which wire would be the brake light, so I left that for another time.
Then started the car and I got bunch of errors and several things were not working:
PSM failure
Sport Mode failure
PASM failure, car stuck in hard settings of shocks
One-touch up/down windows weren't working
Throttle only works at ~50% of load, could not go over 3500 RPM, like limp mode, pushing the pedal all the way down did not do anything
Couple of restarts and PSM failure cleared, then drove around for about 20 mins, turn off the car for 15 mins, restart and windows started working, turn off for 15 mins and restart, Sport Mode and PASM failure cleared, but I noticed that I could not do heel/toe; if I press the brake pedal, throttle does not work.
So, I left it like that at this time, with heel/toe not working and I am not sure if I can go over 50% throttle, I'll test that tomorrow.
I had no problem tapping the RPM signal on my traqmate install. My guess is that the TPS signal is getting you in trouble. Sounds like the logger may be loading down that signal and causing problems.
Dave
yes, you are right, I am pretty sure that my tap to the TPS signal is the issue, but I have not connected the logger yet, just its Universal Sensor Module, which should be inactive. A little more investigation is in order I think.
Thanks Dave.
Just a theory, but the added wire could act as an antenna to pick up noise and bring it into the TPS input. Also, there may be some circuitry inside the sensor module that could upset things even without the logger attached.
Hope it's an easy fix,
Dave
that's an interesting thought, hmmm... I will let you either way, hopefully tomorrow.
Thanks again Dave.
Well, good news, problem solved
After thinking about the issue and how it manifests itself and looking at the schematics of the RacePak's USM, the issue was one of simple grounding. I connected the USM to the G2X logger and attached the power source (turned off), and voila! issue gone. Such a relief!!!
FT - how about some pics?
I'll take and post them tomorrow of the unit. I forgot to take pics during the installation, but Consolidated's article has good pics already,
here
.
After all worked on the car, it was time to configure the logger and the dash unit. Before doing so, I thought I should call RacePak to make sure I have everything connected the way that the logger is expecting. The engineer on the phone confirmed I had it all correct, then offered to connected to my laptop remotely, which was connected to the logger for configuration. He remotely showed me how to do it for future reference, and he did the entire configuration in 30 mins; done!!!
Everything is looking great right now, just as I wanted; the support was just awesome.
