Apologies to utkinpol
Rennlist Member
Joined: Dec 2012
Posts: 667
Likes: 141
From: Columbus Ohio
I am still a little unclear what is the purpose of doing this. I have an 08 c2s that has a few little electrical gremlins. I periodically get the "depress clutch" warning when I clearly have my clutch depressed. I also cannot get my new aftermarket TPMS's to sinc. My car has the original battery so I plan to replace it as my first step in trouble shooting this issues. Should I follow these instructions to "reset the ECU"?
Three Wheelin'
Joined: Jun 2012
Posts: 1,587
Likes: 50
From: MN
Different issues. The ECU will adjust the fuel/air mixture and ignition timing based on driving style. It's continually learning and adjusting. If you drive like an grandma really slow, soft accelerations and soft braking the ECU optimizes everything to that driving style. Then if you switch driving styles say for a track experience, the car is a bit sluggish at first until it adjusts to the aggressive accelerations and braking. Pulling the battery or disconnecting the ECU cable will reset the ECU and speed up this relearning process. It's debatable as to how much you really notice a reset's impact for street driving though.
For your car's age swapping the original battery out is a good start but will not fix the other issues you have. The clutch message is pretty common and can be fixed as a DIY. Search the forums for more info.
The TPMS issue is a different story. Aftermarket or OEM should not matter. If you bought everything from a single source tire shop, take it back for them to fix. If you sourced the TPMS parts yourself first make sure the frequency you bought is correct - US is different than Europe, 315 MHz vs 433 MHz. Some are fixed frequency. Others are universal ones and just need to be programmed. Either way I still recommend taking it to a tire shop for resetting. They have handheld instruments to read the ID's, pressure and such and can do the reset for really cheap. There's not a lot a DIY can do to troubleshoot and fix TPMS issues without access to specialized TPMS scan tools starting at a few hundred dollars on eBay.
For your car's age swapping the original battery out is a good start but will not fix the other issues you have. The clutch message is pretty common and can be fixed as a DIY. Search the forums for more info.
The TPMS issue is a different story. Aftermarket or OEM should not matter. If you bought everything from a single source tire shop, take it back for them to fix. If you sourced the TPMS parts yourself first make sure the frequency you bought is correct - US is different than Europe, 315 MHz vs 433 MHz. Some are fixed frequency. Others are universal ones and just need to be programmed. Either way I still recommend taking it to a tire shop for resetting. They have handheld instruments to read the ID's, pressure and such and can do the reset for really cheap. There's not a lot a DIY can do to troubleshoot and fix TPMS issues without access to specialized TPMS scan tools starting at a few hundred dollars on eBay.
Rennlist Member
Joined: Dec 2012
Posts: 667
Likes: 141
From: Columbus Ohio
Thanks for the clarification. I have seen the DIY on the clutch switch and will do it if the battery does not resolve the situation. I bought the TPMS's from the same supplier everyone and their mother has recommended on this forum (I can't remember their name) and had them installed with my winter tires at the dealer. They are the correct 433 MHz.
Because this winter weather has been so bad I have not driven as much as I did last winter. I will have the dealer check them out when I get the summer tires put on soon if the battery replacement does not resolve the situation.
My car is a manual with the sport mode and I never drive like a grandma or in any kind of commuter traffic so I guess I have no reason to reset the ECU!
Thanks again for the clarification!
Because this winter weather has been so bad I have not driven as much as I did last winter. I will have the dealer check them out when I get the summer tires put on soon if the battery replacement does not resolve the situation.
My car is a manual with the sport mode and I never drive like a grandma or in any kind of commuter traffic so I guess I have no reason to reset the ECU!
Thanks again for the clarification!
