dustin02rsx

Mine seems to be acting up too. It's very intermittent but it makes you think you're crazy until it happens again. Cold starts when you cut the wheel hard in a parking lot it's the most obvious (works off and on quickly). But I also notice its a bit sporadic going over uneven roads too. The steering and suspension function perfectly otherwise.

Has anyone tried replacing the torque sensor?

I'm getting the feeling that the s2000 is meant to be parked during winter months. Mine has all sorts of annoying things going on when it's cold.

Danfotoman

well i got the car back today and it does seem like a new rack helped at all, it's doing the same stuff. so i guess the next step is ts connector and centering, double checking suspension, then eps motor? it may be a series of failures that happen upon failure of other parts. like, i believe the shop saying there was low voltage from the rack, (i didn't even know it is considered an electronic part), that the rack part number had changed, perhaps because of part improvement. and that the dealer said they were selling a lot of them. because now, it seems to have the ability, but it seems lost with power ability. like it wants to go where you want to, but it can't keep up with the steering wheel. and for me in florida, it is not a cold issue, but possibly a too hot issue, that engine bay gets mighty hot in the summer…i wonder if there is a regional honda tech rep who can maybe have a check list/elimination list/troubleshoot list/progression list. these repair folks know the hands-on basics of the car, but may not know the centering relearning balancing stuff. my friend calls the s as balanced as an f-15

MB

Did you check the connector?

I too changed the rack, the EPS ECU and some other things and it was (as above) just the femal connector plug which was to blame. You could just touch it and it would set off the EPS. Can't remember if it was the one on the rack or the torque sensor on the column, but i'd be looking there first before replacing expensive things.

You can also get the fualt codes from the EPS.

D_Spec

Dang :/
Yours sounds identical to mine. I'm here in Florida also, but mine gets worse as it gets colder.
Mine also is getting low voltage. I've replaced the module already and got no change, you've replaced the rack with no change.
It's got to be that plug then!! I've never got the eps light though.
I'm not sure what plug though.
Does anyone have or can take a pic?

Danfotoman

i am having trouble just finding competent people who are familiar with this car's potential problems, i'm surprised at that. i also thought that i could talk directly with a honda tech rep at honda usa, but all they have is dealer-to-tech rep advice. i guess people who have this issue are in a small minority, but it can be terribly annoying at best and life threatening at worst. you call the best honda dealer in town, and they say oh, our s2000 "specialist" is off today, he'll call you tomorrow. my questions include:
-can you access fault codes from the eps? even with no eps light?
-can you determine if a torque sensor plug may be defective?
-are you familiar with "eps relearn" or "eps reset procedure"?
i am not getting answers to these simple, basic questions. it sucks.

D_Spec

To answer a couple.
Yes you can get the codes even without an eps light. Showing. My eps does not show with this issue. So I googled it and used a jumper cable and counted the flashes it gave me.

Danfotoman

ok, sorry it has taken a while to update, but here goes:
assuming the basics- new s-02's.
after having a new steering rack installed, because service folks said that the voltage was low from it, same issue.
too much to the left, little or no power to the right, when turning.
fournier's performance has been doing a bang up job to help, but it has been an undertaking.
suggested a brand new steering rack, as it is an electrical part (i didn't know that) and the honda part number has been updated, suggesting an improved part.
that being said, the problem continued.
then the process of elimination began.
any bent tie rods? no
any bent a-arm? no.
checked computer alignment for caster at -6.0? yes, result -5.8.
performed torque steer learn via obd2 port? yes.
checked all connections and wiring? yes.
performed schematic breakdown of power in/out? yes.
found an open connection at the eps computer module.
traced directly to the module. left turn measured 6.something volts. right turn measured 1.something volts.
so now attention is being shifted to the eps module.
the steering rack is certainly working now, sometimes i turn the engine on and the wheel turns left by itself.
so there is power, at least to the left.
mechanic suggests that maybe the rack low voltage over time messed up the eps module?
now wondering if there is a difference in eps modules with ap1 vs. ap2.....

D_Spec

Good check list.
I need to check the wiring in detail and maybe try swapping the plug on torque sensor (or the sensor itself) . I've replaced the module and it had zero change to the behavior.

D_Spec

Just an update on mine. After replacing the eps module and no change. I cleaned and inspected all plugs and wires. I decided to check the codes again. Now I have a code 14 (TS ground) My buddy brought home the big expensive diagnostic computer. We ran that and it gives a code saying "open circuit on signal wire between EPS and ECU"
I'm having a hard time seeing how cold weather can effect a wire and make the issue worse.

preludepatrick

are you resetting the neutral position correctly?

When you turn it 45 to the left, you need to keep torque on the steering wheel. You should feel resistance fighting you as you hold the wheel steady to the left.

I reset my neutral position incorrectly the first time and I had choppy right-side assist and had a completely loss is assist in cold weather. When I reset it correctly (meaning using the above 'tip'), I had complete assist from lock to lock with no issues since