Stuck in Sport Mode

[memphisnate]

I have a '90 Accord DX that keeps getting stuck in sports mode w/o hitting the button. The only way that I can get it out of this mode is by disconnecting the battery. At first, this would end the problem for a while, but now it immediately goes back. I have checked the ECU, but no code is given.

Any thoughts?

[Fr0z3N]

What is sport mode, and from the sounds of it, it's a good thing? I'd rather be in sport mode then stock or limp, lol

[Joshy]

is it making a buzzing noise around the console area while the break isn't depressed?

if this is the case, it might be the TCU... happened to mine earlier this year and had to get it replaced.

[memphisnate]

To be honest, I'm not totally sure of its purpose. From what I can tell, it allows you to hit higher RPM's before switching gears. The problem is, is that it takes effort to get started and as you try and hit 50mph, you hit 5500 RPM's. It's really bad when it goes in and out of while on the interstate giving you whiplash.

[Fr0z3N]

oh ok, I understand now, sorry about that

[memphisnate]

is it making a buzzing noise around the console area while the break isn't depressed?

if this is the case, it might be the TCU... happened to mine earlier this year and had to get it replaced.

Not really....it vibrates a lot when slowing down.

[MadSpleen85]

What is sport mode, and from the sounds of it, it's a good thing? I'd rather be in sport mode then stock or limp, lol

I sounds like a good idea and is awesome if you can afford to lose a few MPG's. I only use it when I need a little bit more power for passing or racing.

[roostaccord91]

before u check the ecu try checking the connection in the switch itself. see if its loose. if it is regular car vibration can cause it to touch and switch over again. something i would check first.

[CA1978]

I have a 91 lx and my sports mode problem was similiar. It would flash at first I would pull the battery cable and bam perfect again. Each time I did not get codes. Then it was solid and would not reset. It finally gave 8 codes but when I took it the shop the tcu tested bad. My problem was my tcu. Take it to a shop and have test the tcu. If it is the tcu then becareful when you get a replacement I believe that 90-91 dx and lx are the same and a 92-93 will not work atleast that is what my Napa Electronic books said. good luck.

[memphisnate]

Yeah, everything that I can find points me to the TCU. How can I test that? Is this something that Autozone can typically test?

I've found a site that gives me some codes to look for, but I'm not sure where to get those codes from.

[CA1978]

I don't believe they can. I had to take to a shop and pay 60 to get it tested. I hate going to the shop but that may be your only option unless you know someone who can swap you tcu' so you can check.

[pixelmonkey]

can someone tell me what the TCU is or where it's located?

thanks
chris<pixelmonkey>