P1695 no communication for 1997 Dodge Caravan with 3.3L engine.

Question:

My check engine light is on and my dash gages are not working. The ABS light is also on and when I scanned the codes, this is what I got: P1695 no communication for CCD bus lines. How do I check this?

ATS Adviser:

If you read my previous posts about BCM, you can measure the bus line voltages of your BCM terminal pins. With key on, you should get 2.5 volts. Higher voltage could mean a short somewhere in the BCM or in other modules connected to it. You can test it by watching the voltage of the ccd bus lines and disconnecting the other module one at a time. Example: let's say you have a reading of 5 volts which is higher than our requirement. Assuming you have a few modules like AC heater control, instrument cluster, radio, ABS, Air bag, trany control and pcm. If you disconnect this one at the time and the ccd bus voltage returns to 2.5 volts, the last module that you touched is the culprit.

ATS Tip:

The most common module to go on this case is the instrument panel attributed to poor solder connections at the terminal. Take a closer look and inspect the solder and repair if necessary.

ATS will provide a wiring diagram for the above modules upon request.