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Car Forum / Chrysler Cars / September 2004Limp mode
Hello, Is there an "electronical wizzard" out there who can tell me which wire a have to cut to prevent the tranny of mine 95 Stratus goes in limp mode? I have replace the ATF3 + filter, the in- and out sensors and the TCM relais. I don't get any faultcodes (only 55 which means "end faultcodes"). I don't believe the seals are bad because when the tranny goes in limp mode and I reset it (turn off the engine and start again) it stays fine for another 1000 miles. Thanks for your suggestions. IT's going into limp mode to protect itself from further damage. Get the TRANS codes scanned and than see what they entail. DO NOT go cutting wires. Larry > Hello, > [quoted text clipped - 7 lines] > > Thanks for your suggestions. Hi Henny, Yuor (and my son's problems) with the limp mode on the '95 Stratus seem to persist. It kepes coming back. Anyone out there with the final solution (aprt from changing the relay's and sensors)?  SignatureMagiel Venema - Edutour P.O. Box 414 Phone: +31 76 503 2387 4870 AK Etten-Leur Fax: +31 76 501 7601 The Netherlands You should scan for transmission fault codes, which don't show up using the "check engine" lamp method. You really ought to take it in; I wouldn't just cut a wire to keep the tranny from complaining. > Hello, > [quoted text clipped - 7 lines] > > Thanks for your suggestions. > Hello, > [quoted text clipped - 7 lines] > > Thanks for your suggestions. The tranny is going into "limp mode" for a reason! Have a reputable shop check out the codes and see what's going on! > > Hello, > > [quoted text clipped - 11 lines] > The tranny is going into "limp mode" for a reason! Have a reputable shop > check out the codes and see what's going on! Two official Chrysler dealers checked out the codes by computer. No faults were be found!! I think the tranny is going into limp mode for no reason because the tranny stays fine a long time after a reset. I own the car 2 years and it happens 4 times (in 20.000 km) If the tranny is bad it should happens more often or it had break down after 20.000 km. If there is a wire I can cut to prevent the tranny into limp mode, I cut it and I will see what happen. I will take the risk. When my car is going into limp mode by 120 km/u, it's like you make an emercencystop on the highway for nothing. That's very dangeroes. > > > Hello, > > > [quoted text clipped - 24 lines] > km/u, it's like you make an emercencystop on the highway for nothing. That's > very dangeroes. Just had a thought (yes, I know, what a "novel" idea!) and I'm wondering if it could be the tranny's computer? Had a similar situation on a Buick once. Shop couldn't find any problem with the tranny, etc. Finally they tried putting in a new computer. Problem was resolved. It sounds like the trans controller is losing power or ground intermittently. Back in 95, everything put the trans in limpin and set a code. 96 and newer software has a completely different limpin strategy (basically 3 strikes and you are out). Carefully check the powers (there are 3) and grounds. Pin 56 is the B+ and should be hot all the time. Pin 11 is an ignition feed and is the wake up signal to the TCM. It is hot in the unlock, run and start positions. Pin 8 is also an ignition feed but is only hot in the start position. When the key is in the start position voltage at pin 8 causes the TCM to go to sleep (no codes and no shift). The NS minivan had a problem with the ignition switch intermittently bleeding voltage into the circuit going to pin 8 causing the TCM to go to sleep while the car was going down the road. This is perceived as limpin, but is not. If voltage is lost at pin 11, the TCM will go to sleep and the result will be a perceived limpin (with no fault codes). Loss of power at pin 56 will cause the same thing. There was enough loss of power issues that DCX instituted a new code (and I can't remember exactly, when 03 or 04 I think) "power up at speed" P0884. The grounds are located at pins 53 and 57. Bill > > > Hello, > > > [quoted text clipped - 24 lines] > km/u, it's like you make an emercencystop on the highway for nothing. That's > very dangeroes. > It sounds like the trans controller is losing power or ground > intermittently. Back in 95, everything put the trans in limpin and set a [quoted text clipped - 14 lines] > can't remember exactly, when 03 or 04 I think) "power up at speed" P0884. > The grounds are located at pins 53 and 57. Could a bad tranny range sensor (the thing that tells the computer what gear you've selected) also act like this? They do go bad occasionally. Bill Putney (to reply by e-mail, replace the last letter of the alphabet in my address with "x") 95 and older 41TE's had the PRNDL and Neutral safety switch setup, 93-95 LH's used MVLPS [Manual Valve Lever Position Sensor (a TRS without a temp sensor)]. All 96 and newer (except some early 96 NS's) use the TRS (trans range sensor). If the TCM stops receiving input from the TRS, then the PRNDL display puts a circle around all PRNDL indicators while in park or neutral (as seen by the pressure switches. Code 28 is an indication that the TRS or PRNDL/Neutral safety switch setup has one circuit that doesn't change state or there is no gear indication from the TRS. The first diagnostic step taught to all DCX technicians (trans) is to validate the shifter input. If the TRS doesn't indicate the proper shift lever position, then all fault codes are INVALID. So the long answer to your question is that a bad shifter input can cause all kinds of problems, but usually they set some kind of code even if it's an invalid one that leads you on a wild goose chase. This guy's problem is probably a loss of power. A way to verify this is to hook up a DRB3 just after it happens and read DTC's. If power was lost then the read DTC's screen will show no codes, BUT it will also show a very low "starts since cleared" on the DTC screen. This "starts since cleared" tops out at 255 on most vehicles. So if power wasn't lost, then the number will be high, although disconnecting the battery or the TCM resets this number also. When power is lost the "starts since cleared" is reset to 0. I can't say what any of the other scanners might show. Hope this isn't too disjointed, Bill > > It sounds like the trans controller is losing power or ground > > intermittently. Back in 95, everything put the trans in limpin and set a [quoted text clipped - 25 lines] > http://www.newsfeeds.com - The #1 Newsgroup Service in the World! > -----== Over 100,000 Newsgroups - 19 Different Servers! =----- > > > It sounds like the trans controller is losing power or ground > > > intermittently... [quoted text clipped - 26 lines] > > Hope this isn't too disjointed, Not at all. Thanks for the clarification. Bill Putney (to reply by e-mail, replace the last letter of the alphabet in my address with "x") >> > Hello, >> > [quoted text clipped - 27 lines] > That's > very dangeroes. Like everyone has been telling you, it is going into limp mode for a reason. I must say I am baffled as to why the dealer was unable to pull any fault codes, but trying to disable limp mode is certainly not the answer. A possibility is that you have a bad connection some place, or it could be more serious. If your car is going into limp at 120 kph (62 mph (I think) you've got something VERY weird going on. THe proper computer is rigged to NOT allow limp mode to occur above 45 mph (whatever that is for you KPH folks). I'd find another dealer. I bet you've got anold computer on this rig. Larry > > > Hello, > > > [quoted text clipped - 24 lines] > km/u, it's like you make an emercencystop on the highway for nothing. That's > very dangeroes. The four times it happend I was driving about 40 mph. It never happends at 120 km/u. I only was afraid it could be happen at 120 km/u. So thank you for your information. When I drive above 45 mph I feel safe now. > If your car is going into limp at 120 kph (62 mph (I think) you've got > something VERY weird going on. THe proper computer is rigged to NOT allow [quoted text clipped - 36 lines] > That's > > very dangeroes. To the contrary. There are 2 kinds of TCM shutdowns (limpin): Orderly shutdown and Immediate shutdown. In an orderly shutdown below 45 mph the TCM just shuts down and the trans immediately goes into 2nd gear. In an orderly shutdown above 45mph, the TCM releases all the clutches (neutral) until speed comes down below 45 mph then the TCM shuts down and the trans is put in 2nd gear. An immediate shutdown occurs when the TCM senses a severe failure that can cause catastrophic trans failure. An immediate shutdown can occur at any speed. Shifting to second gear assumes that the trans is capable of attaining 2nd gear. Bill > If your car is going into limp at 120 kph (62 mph (I think) you've got > something VERY weird going on. THe proper computer is rigged to NOT allow [quoted text clipped - 36 lines] > That's > > very dangeroes. I kind of know how dangerous limp mode can be on the highway. I used to own a '95 Chrsyler Cirrus, was the worst car I ever owned in my life... bought it when it had 40K miles. I bought an extended warranty, within the first 2 months of ownership, throttle position sensor failed... got replaced under warranty, then shortly the following month my transmission failed. That too got replaced by warranty.... then all went downhill. Warranty expired, had 3 more transmission failures, a/c went, ABS controller failed, and transmission computer failed and had to get replaced... was so tired of getting it fixed.. finally gave the car back to the bank...couldn't afford fixing it and paying the loan at the same time. All this and the car had only 87K miles when i gave it up. > > > Hello, > > > [quoted text clipped - 24 lines] > km/u, it's like you make an emercencystop on the highway for nothing. That's > very dangeroes. Look, Heinie, isn't it about time you wised up and start shifting gears for yourself again? The automatic has run its course and its time to get back to basics. The automatic was perfected with the 1939 Hydramatic and its been on a downhill roll ever since. Your transmission, when and if it ever works again has a torque converter. Haven't you ever noticed that it wants to go all by itself whenever you place the selector in "drive"? It will drive itself to oblivion even if you don't press on the gas pedal. You need to hit the brakes to control its suicidal tendencies to self destruct. Don't you see something wrong with this setup? It does that because it has a torque convertor instead of a Hydramatic coupling. That is simple Automechanics I. Insist your next car have a clutch and gearshift and you will no longer complain about limp home mode anymore. You will be a happy camper once again. What's the matter with Daimler-Chrysler, equal partners, anyways? Germans are real drivers and won't settle for automatics. They were born to shift gears. Automatics are likewise an insult to Americans who can match Germans, crash for crash any day of the week. Automatics were invented to enable uncoordinated spastics to pass the driving exam. That's why we have so many crashes here and overseas. If you can't shift, you don't drive as far as I am concerned. Dude, the computer is the only thing that can shift it. You can't make the computer any happier by cutting wires. > Hello, > [quoted text clipped - 7 lines] > > Thanks for your suggestions. I understand that, but the computer and the tranny are two parts connected by wires. If the computer says "go into limp mode" then this message is send to the tranny trough a wire. Tell me if I am wrong please. > Dude, the computer is the only thing that can shift it. You can't make the > computer any happier by cutting wires. [quoted text clipped - 11 lines] > > > > Thanks for your suggestions. >I understand that, but the computer and the tranny are two parts connected > by wires. If the computer says "go into limp mode" then this message is [quoted text clipped - 5 lines] >> the >> computer any happier by cutting wires. It's the other way around: the transmission controller detects an internal problem, goes into limp mode and tells the engine controller about it. Floyd > > > Is there an "electronical wizzard" out there who can tell me which > > > wire have to cut to prevent the tranny of mine 95 Stratus goes in > > > limp mode? > > Dude, the computer is the only thing that can shift it. You can't make > > the computer any happier by cutting wires. > I understand that, but No, obviously you *don't* understand that. If you *did* understand that, there would be no "but" at the end of your sentence. Your transmission will have one gear only (2nd) if the computer and transmission cannot see each other. Your transmission is going into limp mode because there is something wrong with it. Fix it! |
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