Chrysler collision data bus

[tugalo]

Does anyone know what the normal voltage level is supposed to on the CCD bus? i have a 98 Grand Cherokee and everything works except the radio dislay, and the way I read the manual, that display is controlled by the CCD bus.

 

[Talyn]

The radio display isn't controlled by the CCD bus. The radio is pretty much a separate entity until you go with something like the Igig in a WJ. The only thing I can think of that the radio would pull from the CCD bus is the time.

 

[tugalo]

thanks for the reply Tylan,
the manual says that the CCD controls all the flourescant displays on the instrument panel, the overhead console and the radio. I am measuring 2.3v on the CCD connector to the radio.

 

[kastein]

The CCD signal is a differential signaling serial data bus... 2 wires. It passes binary data in a specific format, measuring the voltage on the wires with a meter will unfortunately tell you almost nothing about what is happening. You should however read about 2.5 volts on each, iirc.