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1998 Chrysler Voyager: Transmission Problem?

GEAR BOX STUCK IN LIMP MODE & NO CCD BUS MESSAGE FROM TCA


Transmission getting stuck in limp mode.Most probably gears getting stuck up in 3rd gear.


Its a issue which has multiple possibilities.

Actually in sticks in 2nd gear when it goes into limp in mode

This could be caused by number of reasons.
It could be a faulty speed sensor( there are two sensors), wiring issue or a mechanical problem within the transmisison.
The first thing to do is to scan your Transmission Control Module for trouble codes.
The TCM should detect and store a trouble code that might be helpful to diagnose the reason.
You will need to find a workshop that has a DRB III scan tool.

All PCM, TCM and BCM needs to be inspected.

For more help read the details as follows:---------


  • PCM is Powertrain Control Module. It is a module that controls and manage your engine operation.
  • TCM- Transmission Control Module - A module that controls transmission 
  • BCM- Body Control Module. This module controls many things such lighting, door locks, wiper/washer etc.
  • No ccd bus message from TCA means that TCM does not respond to a scan tool and other control modules do not get a message from TCM, It simply does not work like if it was switched Off or disconnected from the car systems. 

When it does not work, the transmission is not controlled so it just stays in limp mode= second gear.
This could happen if your TCM is bad or there is a wiring issue.

In this types of problem first  check for all powers( battery voltage and Ignition Run voltage) and grounds.
If power and grounds are OK at the TCM connector, then communication circuits ( CCD BUS) must be checked then.
If everything is good and there is no problem with wiring, then your TCM is likely faulty.
And it has to be replaced.

FOR LOCATION OF TCM THE DETAILS ARE AS FOLLOWS:---

The TCM should be located on the right fender inner panel in the engine compartment but since your car is a RHD car, it could be in a different place. Anyway, it should be still under the hood.
The TCM has a one 60-way connector that has a 8mm or 10mm center bolt securing the connector to the module.

You should also know that there is a transmission control solenoids unit that could also be faulty but it would not cause a "no communication/response" issue.

See the help diagram shown below:----

Chrysler TCM wiring diagram


The other lower part of TCM diagram
TCM module

The last remainder part of Transmission control module

engine pcm and tcm module

WHAT PIN CONTROLS WHAT
THE HELP DIAGRAM IS SHOWN BELOW
PLEASE NOTE THERE IS NO PIN FROM 21 to 40.

The diagram is as follows:---
TCM pin out details
transmission module pin details

pin out details

FOR more parts location help,read the details as follows :----


The BCM is attached to the back of the junction block. You will need to remove the junction block in order to remove the BCM from it.
The junction block should be inside the car near the steering column and pedals ( at least it is on LHD cars so on RHD cars it probably should be on the Right side).


You will need to disconnect all connectors and take the fuse/junction box assembly out of the car. then you will see the BCM at the back of the fuse/junction box.
The two bottom connectors you can see are attached exactly to the BCM.


See the image of BCM on this car :---
bcm

This details will help.
Thanks.


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