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Car Forum / Chrysler Cars / December 2007Code 1698
Our '96 T&C (184K miles) has been intermittently showing this code, mostly in the mornings when it is cold. Driving it for a short time causes the problem to "resolve" itself. The transmission selector shows boxes around all gear choices (so you cannot tell by looking at the instrument which is selected); the speedometer does not work; the check engine light is on; the transmission is in "limp in" mode and the scanner shows 1698 (no signal from transmission module). First guess: it's likely a connection issue. Is this the big connector right below the battery box? If so, I'll open it up, inspect the connections, clean what I can with alcohol and compressed air and put it back together. Unless, of course, someone has a better suggestion or another diagnosis. Thanks in advance, Ken p.s. Ignore my posting "Dashboard lights hesitation" from yesterday > Our '96 T&C (184K miles) has been intermittently showing this code, mostly > in the mornings when it is cold. Driving it for a short time causes the [quoted text clipped - 18 lines] > > p.s. Ignore my posting "Dashboard lights hesitation" from yesterday I worked on a '96 Caravan with the same symptoms that the fuse for the TCM in the underhood box had corroded through so I swapped in the hazard light fuse IIRC and all was well. >> Our '96 T&C (184K miles) has been intermittently showing this code, mostly >> in the mornings when it is cold. Driving it for a short time causes the [quoted text clipped - 22 lines] > in the underhood box had corroded through so I swapped in the hazard light > fuse IIRC and all was well. Thanks, Daniel. I could not determine which fuse was protecting the TCM, so I took a look at the worst looking one or two. There was some corrosion, but the engaged portions of the contacts looked OK. I cleaned them up and stuck them back in. I would appreciate knowing exactly which fuse you replaced. None say "TCM" on them. Regards, Ken >>> Our '96 T&C (184K miles) has been intermittently showing this code, >>> mostly in the mornings when it is cold. Driving it for a short time [quoted text clipped - 35 lines] > > Ken I think it was labled EATX (Electronic Automatic TransaXle) but I could be wrong. It was a friend's van so I can't easily check to be sure. >>>> Our '96 T&C (184K miles) has been intermittently showing this code, >>>> mostly in the mornings when it is cold. Driving it for a short time [quoted text clipped - 37 lines] > I think it was labled EATX (Electronic Automatic TransaXle) but I could be > wrong. It was a friend's van so I can't easily check to be sure. Yep...that's one of the two I inspected. But, unfortunately, no go. It is still exhibiting "morning sickness". The interesting thing is that it is very deliberate in how it behaves and it seems to be totally thermally induced. With an intermittent there is a lack of stability, which this issue does not exhibit. I only have a Chilton/Haynes type manual which shows some "typical" wiring diagrams. I wonder if there is some type of thermal sensor that has gone bad, either external or internal to the TCM. Also on this data bus from the TCM is the overhead panel. When the problem occurs, certain information there is also not updated. This suggests that the code is correct and there is, indeed, no communications from the TCM. Ken > ...I only have a > Chilton/Haynes type manual which shows some "typical" wiring diagrams... Let me ask you: Would a "typical" highway map, say, one showing how to get from LA to Seattle, be of any use if you were driving from, say, Miami to Washington, D.C.? If the map from Miami to D.C. were $7, and the one from LA to Seattle were only $0.75, would the LA-to-Seattle map be the better buy? How is that any different than paying $15 for a manual with "typical" schematics because it is a lot cheaper than the $100 manual with the schematics that actually apply to your vehicle? It might even be worth $25 for a 1-year AllData on-line subscription just to have access to the accurate schematics right out of the FSM over your "typical" (i.e., worthless) Haynes schematics for this one-time immediate need. Sorry to butt in without offering help for your problem - if it was an LH car I might have something to offer. :) Bill Putney (To reply by e-mail, replace the last letter of the alphabet in my address with the letter 'x') >> ...I only have a Chilton/Haynes type manual which shows some >> "typical" wiring diagrams... [quoted text clipped - 17 lines] > (To reply by e-mail, replace the last letter of the alphabet in my > address with the letter 'x') Yea...I'm a cheap bastard, Bill. But think of it this way: Ahhhhhhh....the challenge! Actually, I took the advice of another poster years ago and glued all the pages to one another. This, unfortunately, makes it real hard to look anything up. Ken > > ...I only have a > > Chilton/Haynes type manual which shows some "typical" wiring diagrams... [quoted text clipped - 17 lines] > (To reply by e-mail, replace the last letter of the alphabet in my > address with the letter 'x') Ok Bill why do you have to pick on Washington DC folks? >>> ...I only have a >>> Chilton/Haynes type manual which shows some "typical" wiring [quoted text clipped - 19 lines] > > Ok Bill why do you have to pick on Washington DC folks? Actually, max, I am in the San Francisco Bay area. We are used to being picked on (land of fruits and nuts; left coast; etc.) Any insights on my problem? Thanks! Ken > >>> ...I only have a > >>> Chilton/Haynes type manual which shows some "typical" wiring [quoted text clipped - 28 lines] > > Ken I was referring to myself. Anyway, you are having a bus failure.(communication between modules) A problem like that is very tricky to find unless it is happening at the time you are performing the test. It could be anywhere from a module shorting out to a harness problem. A scan tool is needed to see what modules are communicating over the bus to diagnose this problem.What you can do is directly under the battery tray are some connectors, access these to see what condition they are in. If battery acid drips and eats these up it will cause this kind of problem. That is where I would start. Glenn >>>>> ...I only have a >>>>> Chilton/Haynes type manual which shows some "typical" wiring [quoted text clipped - 41 lines] > > Glenn Much appreciated. I'll check it out. Ken |
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