ATTS Light Came On..... - Honda Prelude Forum

liquidxnitez · 10-22-2007, 04:49 PM

Freak thing happened today. I was stopped at the entrance/exit of Staples about to make a right turn. When it was clear for me to do so, I got into first gear and then after maybe getting upto 3k RPMs or so, 1st gear suddenly wouldn't go any further. It felt like it was at the rev limiter.

ATTS light turned on when it did that. I went into 2nd gear and power was back to normal. I drove maybe 1 minute down the road to see if there was any issues with driving - none. I stopped, turn off the car, restarted, ATTS light is gone.

Now, this was a freak thing but it worries me. When I went to NY to visit a friend this past summer, I hit a pothole there and that caused my ATTS light to come on. Big bump, ATTS Light comes on. Turn off car, restart, everything is back to normal.

Just recently I had my TBelt and all the other crap changed. After that, I started to hear a tortional noise whenever I brake. Not all the time but most of the time. Its definitely a rotational noise and after the car stops fully, the noise lingers for a second or two before stopping.

I don't know if these things are related but any help would be appreciated.

Ludatic · 10-22-2007, 07:20 PM

similar happened to me recently too, car's just gettin old man

i'm gonna do another flush on my atts fluid some time soon for the hell of it, its been a while anyway

liquidxnitez · 10-22-2007, 07:23 PM

You think? I was thinking that the huge pot hole I ran into caused some damage to something on the car when the ATTS light first came on at that time.

I'm going to have my Honda mech take a look at it. Maybe I should change the fluid while I am at it.

Ludatic · 10-22-2007, 07:28 PM

if it happens again i'll run the diagnostic and check the code

ImagePree · 10-23-2007, 09:42 AM

I guess 10/22/07 is the day that ATTS lights come on for everyone.

But I know why mine came on => leaky power steering sysytem = empty reservoir.

Ludatic · 10-23-2007, 11:08 AM

Quote:

Originally Posted by ImagePree

I guess 10/22/07 is the day that ATTS lights come on for everyone.

But I know why mine came on => leaky power steering sysytem = empty reservoir.

dagh good point, i've been having some PS problems recently too, damn leaky hose

Daemione · 10-23-2007, 01:19 PM

Every 1-3 years mine will have a similar ATTS f-up moment . . . always when pulling out from a stop around a corner, usually in a variable traction situation (dirt road, snow/slush, whatever). I really wouldn't worry about it at all unless it happens again real soon.

fwiw, I changed my ATTS fluid for the first time last fall at about 150k.

Wsteun · 10-23-2007, 01:38 PM

I've had mine come on like 3 or 4 times in the past year or so. It's always when I'm turning & it goes off after I re-start the car.

liquidxnitez · 10-23-2007, 02:42 PM

Quote:

Originally Posted by Daemione

Every 1-3 years mine will have a similar ATTS f-up moment . . . always when pulling out from a stop around a corner, usually in a variable traction situation (dirt road, snow/slush, whatever). I really wouldn't worry about it at all unless it happens again real soon.

fwiw, I changed my ATTS fluid for the first time last fall at about 150k.

No variable traction situation the other night. Pavement to pavement.

Maybe its because I was on the entrance incline transitioning to the road pavement? I dunno. I still need to check out wtf that rotational noise when braking is.

liquidxnitez · 11-02-2007, 11:21 AM

I never got around to pulling the code BUT today it happened again. Same scenario - making a right turn out of a parking lot, 1st gear loses power/feels like it hit rev limiter, ATTS light comes on.

Now it stays on even after I restart the car. Great. I am going to see if I can pull the code later on today.

liquidxnitez · 11-02-2007, 02:18 PM

OK I pulled the following:

ABS Code

81 - CPU

ATTS Code

79 - ATTS Control Inhibition
78 - ATTS Control Unit
33 - Manifold Absolute Pressure (MAP) Sensor
42 - PGM-FI Communication Line
41 - PGM-FI Communication Line

Bleh....lotsa codes. :O I have not erased the codes via removing the battery terminal.

Chief_Rocka · 11-02-2007, 09:11 PM

This just happened to me but my car only has 52,5xx miles.

liquidxnitez · 11-03-2007, 07:06 AM

bumpity....can anyone tell me anything about the codes? Is this a sensor problem? Or more severe than that?

ThatPreludeGuy · 11-03-2007, 10:36 AM

I used to throw codes a dozen or so times a year, one of the many reasons I ditched it when I did my swap. Even when it was under warranty the dealer would either claim the issue was from the aftermarket wheels or the coilovers.

bb6flier · 11-04-2007, 06:35 PM

Was the ABS light on when the ATTS light was on?
Code 81 is for the ABS control unit, if the light doesn't come back on than ignore it (intermittent failure).
IF the ABS light is on it will disable the ATTS unit and throw diagnostic codes, hence the 78,79,41,42 codes, I'm not sure about the 33

For the code 33 there is either a short or loose connection between the ATTS control unit and the MAP sensor. If it comes back again I would start by disconnecting and reconnecting the ATTS unit harness and see if it throws 33 again.

Since you've recorded all the stored codes go ahead and reset everything and see if they come back.

LUDENNYC · 11-05-2007, 05:43 AM

No means to thread jack. But what is the correct procedure for attaining ATTS codes? Thanks.

liquidxnitez · 11-05-2007, 06:22 AM

^^

The OBD2 port is on the passenger side center console area in the foot well. Pop off the carpeted cover and you will see a black port and a blue port next to it. Attached to the blue port is a connector. Make sure the car is OFF. Pop that connector out and short the two pins together. Place your key into the ignition and turn it twice (I forget if that is ACC 1 or 2). If your car is throwing codes, you will now see the appropriate light(s) flashing longs and shorts.

paulyg · 11-05-2007, 07:19 AM

Vic. I would take care of or investigate the MAP sensor first. I'm sceptical that an error in the ATTS would make the car stop accelerating in first gear. Granted I don't know much about ATTS but something seems wrong there. However if your MAP failed I could totally see you loosing power. And maybe that MAP hickup caused the ATTS codes.

Also you said something about pulling under braking. I would check your suspension joints. Especially the radius rod ball joint. Jack up the car and shake the front end down.

bb6flier · 11-05-2007, 05:11 PM

ATTS codes under acceleration do cause a momentary loss in power, that is a normal "failsafe" function. The codes for the MAP and the ABS are abnormal, and both will cause an error independantly. Just double check the connections, both the ATTS control unit and the MAP sensor itself.
Did you throw the same codes again after resetting???

Eric98sh · 12-16-2008, 08:56 AM

my engine light came on at the same time my atts light came on ?