Question about 2002 Dodge Caravan

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P1698 code TCM and PCM not comunicating

I have a 1998 dodge stratus 2.4 liter and have replaced the input and out put speed sensors. Engine light went off but now I have a p1698 code is on. Car is still in lymp mode and all of the transmission lights (P,R, D, 3,2) are on and the odomiter does not read. As I understand the probem is the TCM and PCM are not talking to each other. Do I have to reset the codes in the car? Is this a bad ground? Other? Thanks,

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  • BCautotech May 11, 2010

    This is a bus communication issue. Does the car have a remote starter?



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P1698 code no instrutment cluster

Posted on Aug 17, 2009


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I have a 1998 Plymouth grand voyager. Code came up on the reader -"P1698 no ccd/j1850 message from tcm/PCM" the speedometer isn't working and it seems to be stuck in 2nd gear. The check engine light is on....

You need a professional to work on it

Test the battery,it may have failed
Check the cables

You have an ECM no CCD message from
the TCM Module

Beyond anything you can do, but use the vehicle
& ruin the transaxle

Aug 19, 2014 | Cars & Trucks

1 Answer

P0700 and p1698

P0700 DODGE - Transaxle Control System Malfunction. Tech notesP0700 is just and informative fault code that indicates a malfunction has occurred in the automatic transmission and the TCM has requested the PCM to turn on the Check engine light you must now have the dealer scan the TCM for more codes to resolve the problem.P1698 DODGE - DTC Detected in Companion JTEC Module, These codes are related and you need the dealer to scan the system.

Sep 30, 2012 | 2003 Dodge Caravan

1 Answer

I've owned our 99 Grand Caravan for 3 years and for 3 years occasionally all instruments would quit and I would pound on the dash and it would come back. About 2 years ago the abs quit and the abs light...

the most common is a bad cluster
you have to remove it
that could be a pain but it can be done
after removing the cluster remove the cardboard cover in the back remove circuit panel board and check in the middle for a broken weld here your question for your insterment panel
The Transmission Control Module (TCM) is not communicaring with the PCM.
Check all fuses. It could be a power or ground problem or a ccd bus communication wiring problem.
If not it's likely an internal failure in the TCM.
You may be able to get a schamatic at your local library.
If it's not a power, ground or wiring issue you should take it to a dealer with a DRB III to confirm the diagnosis.
Best of Luck! Source(s): Master Technician
Shop Foreman at a Dodge Chrysler jeep Dealer

Dec 05, 2010 | Dodge Grand Caravan Cars & Trucks

1 Answer


Code P1698 means
* P1698 PCM Failure EEPROM Write Denied
* P1698 -No CCD messages from the Transmission or Body Control Module (TCM or BCM) Probably needs a new PCM (Aka computer or ECU)

Nov 13, 2010 | 1998 Dodge Caravan

3 Answers

Check engine light is on with code p1698 what is this code

The code P1698 is: No CCD messages from TCM. That means the communication between the Transmission Control Module and the Power Control Module is lost. Sometimes this happens when a PCM, or TCM is replaced without being flashed, a bad connection at the PCM, TCM, or a bad TCM. Hope this helps.

Mar 04, 2010 | 1999 Dodge Caravan

2 Answers

Engine check light

It means that it didn't receive a signal from the transmision module.
Have your transmission control module checked.

To reset your engine codes:
Remove the negative terminal of your battery (10mm wrench).
Turn your ignition key to START and hold it there for about 15 seconds.
Turn your ignition key to OFF and remove it.
Connect the negative terminal of your battery.

TCM (Trans control Module)
(electronic transmission control module)

Jan 09, 2009 | 2000 Dodge Dakota Quad Cab

3 Answers

Speed sensor location

Hi my name is Allen!

Both the Input and Output speed sensors or mounted on the side of the trans, they are not to far away from each other, you will see the electrical plug coming out of eack one of them. They are round, biege in color with a black end on it where the connector plugs into. If you don't know which one is bad you will need to replace them both.

For further assistance contact me at FixYa!

Jan 02, 2009 | 2001 Dodge Caravan

2 Answers


the tcm is located in the fender well behind the bumper drivers side black box check the wiring for bad cannection,

let us know what you find there are thousands of us with the same problem


Aug 13, 2008 | 2002 Jaguar X-Type

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