Chrysler Repair: Check engine soon light is on/code P1698, powertrain control module pcm, powertrain control module


Question
I have this 1999 Chrysler town & country. I scan at Autozone and they gave me the code Troubleshooting code: P1698. Can you tell me what it is?

The ticket they print also says:
Definition: ECM fault-No CCD message from ICM
Explanation: Failed ECM
Probable Causes: 1-Open CCD bus line; 2- Faled TCM

Some syntoms:
1)ABS light comes on sometimes
2)Odometer light turns off,
3)lights do not turn on
4)Passanger side window is not working

Thanks

Answer
Hi Sergio,
Here is my "take" on the P1698 code:
The P1698 code means that no digital data is being received by the powertrain controller from the transmission control module, located on the right inner fender. The manual says to check the ccd bus wires between the module and the rest of the system using the Chrysler diagnostic readout box. But if you don't have one then I think you can do the same thing by measuring for continuity (near 0 resistance) between pin 4 of its plug and pin 11 of the data link plug under the dash or pin 59 of the powertrain controller plug.
Then check the resistance between pin 43 if its plug and pin 3 of the data link connector or pin 60 of the powertrain controller plug. The powertrain controller is on the opposite side of the engine compartment on the left inner fender. These module plugs are held in place by a bolt. If the continuity between the transmission and the powertrain CCD wires checks to be ok, then according to the manual the trans controller should be replaced. You may be smart however to find an honest shop that has a code reader and let them determine for sure that it is the TCM and not the Powertrain control module (PCM) that is the fault. These modules are expensive enough that you would not want to replace the wrong one.
The other symptoms (1-3) are likely related to the problem because they are also dependent on the digital data communication bus for getting their instructions or sending their information.  The passenger side window is probably not related to this, but rather a failed connection, switch or motor.
Roland