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Trouble code p 1698 no message from tcm - Grand Caravan Dodge Cars & Trucks

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The 1698 code means either that there is no digital data communication from the the transmission controller OR from the body controller that is being received at the powertrain control module. An analyzer that read "hex" codes would distinguish which, the former being a 60 the latter a 61 hex code. Without a sophisticated diagnostic box about the only thing an amateur can do is shake the harnesses at those three controllers to see if you can induce an interruption that causes the light to come on in the case where it was a simple electrical wire discontinuity as the cause. With a diagnotic box the actual electrical characteristics of what is going on as shown on the data bus wires can be performed that might reveal which component is failing and why if it is not a wire problem.
I can give you the pin numbers at all three of those modules so that you could do a continuity check/harness shake test if you have an ohmmeter or continuity checker and would like to get into it. Otherwise trying to get a good referral to a tune-up mechanic who is familiar with the Chrysler system and has the test tools is the only alternative that will get the answer with the minimum of costs. It is not something that you want to try solving by throwing parts at it.

Posted on Jan 02, 2011

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If the service engine light comes back on with the same code you have a problem in the wiring between the TCM and the PCM or the TCM itself is bad. CCD is the data bus the computers talk to each other on. For some reason the TCM isn't sending required data to the PCM. I can't find much info on how to troubleshoot. I would say if the wiring shows continuity and the connections are clean and tight, you may need a new TCM. Scanning through threads on the forum, it appears fixes range from loose connections to replacing entire wire harnesses to bad TCMs. Read a couple that implied bad solder joints on the instrument cluster or replacing the cluster itself fixes it. I'd have to research that a bit.

PCM = Powertrain Control Module It's a computer that controls engine functions Located on the drivers side fender wall outboard of the battery
TCM = Transmission Control Module A computer that controls transmission functions Located on the passenger side fender wall.

keep us updated.

Posted on Jan 02, 2011


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I have a 1998 audi a4. it will not start and gives me the p1749 and p1625 codes. how do i fix this?

code p 1625 refers to CAN databus, TCM--incorrect signal===causes --TCM trouble code/s stored---TCM incorrectly coded---wiring---matching resistor in ECM
I don't have a listing for code p 1749 but codes 1748 and 1750 are concerned with TCM defective and voltage supply low
so after you check the wiring and connections form the transmission you have 2 options
use a known good ECM to replace yours ( will eliminate any ECM faults)
and/or replace the TCM module on the transmission

Nov 14, 2015 | 1998 Audi A4

1 Answer

My 2003 chrysler town and country just put up code p1698 through my trip odometer what is 1698 mean?


Nov 09, 2013 | 2003 Chrysler Town & Country

1 Answer

What part do i need to repalce

Hi Cornejo:
The DTC (Diagnostic Trouble Code) P0700 code is not the actual code that is of concern. The P0700 code is stored in the engine computer.

This code means that there is a code stored in the Transmission computer. The trans computer sends a message to the engine computer that there is a trans code stored. This lets the engine computer turn on the "check engine" light.

You need to have the transmission computer scaned for codes to find out whats going on. Most code readers do not read trans codes, you need to have a scan tool that is able to do this.
This could mean almost any thing. Most trans codes are eletrical related with the allison transmission.
Here is the diagnosis chart for the P0700. Again, this code only means a trans code is set in the TCM, not a actual failure code.
DTC P0700
Circuit Description
This diagnostic trouble code (DTC) indicates that a related transmission DTC set in the transmission control module (TCM). The engine control module (ECM) receives the TCM DTC information over the serial data circuit. The ECM turns ON the malfunction indicator lamp (MIL) when the TCM sends a message over the serial data circuit requesting MIL illumination.


Conditions for Clearing the DTC graphic
The control modul turns OFF the MIL after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A scan tool can clear the code from TCM history. The TCM automatically clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without failure.

1. Verify power and ground supplies to the TCM when the vehicle is cold.

2. If OK, depending on ambient temperature. If ambient temperature is high and the problem will not show, remove the TCM and place it in a freezer for a couple of hours.
3. If the ambient temperature is low remove the TCM to a warm area for a couple of hours.
4. After sufficiently cold or warm, install the TCM and drive the vehicle immediately.
5. If the ambient temperature is low and the transmission now shifts or the ambient temperature is high and the transmission will not shift replace the TCM.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day

Feb 15, 2012 | Chrysler Town & Country Cars & Trucks

1 Answer

I have a 2004 Chrysler 300m with a 3.5l engine and getting a 0871 and 0700 code.

Please don't forget to rate!

Trouble Code: P0871 (3.5L V6 VIN G Auto)
A/T O/D Pressure Switch Circuit Malfunction

Trouble Code Conditions:
Engine started; vehicle driven in a forward gear, and the PCM detected that the O/D Pressure Switch circuit indicated open or closed at the wrong time.

Possible Causes:

  • Related DTCs may be present
  • O/D pressure is incorrect, or internal transmission faults exist
  • O/D pressure switch circuit is open, shorted to ground or power
  • O/D pressure switch is damaged or it has failed
  • TCM relay power circuit to O/D switch is open (loss of B+)
  • Intermittent wiring or connector problems exist
  • PCM or TCM has failed

Trouble Code: P0700 (3.5L V6 VIN G Auto)
Automatic Transmission Control System Malfunction

Trouble Code Conditions:
Ignition on or engine started. The PCM received a message over the CCD Bus from the Transmission Control Module (TCM) that it had detected a problem and set a trouble code in memory.

Possible Causes:

  • The presence of this code means the TCM detected a problem
  • TCM related Sensor has solenoid is damaged or has failed
  • This code is for information only - check for other TCM codes
  • TCM or PCM has failed

May 08, 2011 | 2004 Chrysler 300M

1 Answer

2001 dodge ram 2500. I am getting 3 service codes 1693 1694 and 1698 what are the and how do I fix them? I just had a new engine controller put on. Any ideas

P1693 - A companion DTC was set in both the ECM and PCM
P1694 - No CCd message from PCM - Aisin transmission
P1698 - No CCd message from TCM
I would check the connections from the new engine control. Are these codes that show up new or have they not been cleared from a previous problem. Be sure all codes are cleared, Hope this helps. Let me know. Thanks

Jan 08, 2011 | 2001 Dodge Ram 2500 Truck

1 Answer

What is the repair for computer code 1698?

The code 1698 is no communication from tcm (trany control module), this may be cause by a bad trany module computer or wiring to computer, more testing would need to be done before calling module bad,

Aug 24, 2010 | 1997 Dodge Grand Caravan

1 Answer

Wont shift from second gear,changed speed sensors, map sensor ,code 1698 comes up on computer

this code point to diagnosing the TCM. This is prabably a computer issue.

Apr 09, 2010 | 2002 Dodge Neon

2 Answers


Dodge: No CCD message from TCM or No Transmission Bus Messages

Nov 18, 2009 | 1999 Dodge Caravan

1 Answer

1999 Dodge Caravan

A P1698 code is described as PCM Fault, No CCD Messages from TCM Conditions. It's triggered when the key is on, and the PCM did not detect any CCD messages from the Transaxle Control Module (TCM) for 10 seconds. Time for a trip to the dealer unless you feel like inspecting the wires & connectors leading to/from the TCM. Usually I tell people to go to the dealer when there are TCM problems! They can read any codes stored in the TCM that a regular code reader can't get. Good luck.

Feb 12, 2009 | 1985 Honda Civic

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