hey my 99 dakota's odometer has said "no bus" since i bought it, nothing is wrong with it, truck runs fine, drives fine. everything electrical works, i checked the pcm, etc.. everythings working just wondering why it would say that? is there a way i can get rid of it? no codes stored also. strange.

 

The cluster is a computer itself. Dodge uses what is called a CCD bus, 2-wire, to send data between the various modules including the central timer, PCM, ABS, the cluster, etc.

Have you had a any mods to the wiring done? Maybe an aftermarket radio?

 

as a matter of fact i do have a aftermarket stereo deck, but i have done the same in my old 3.9 dakota and didnt experience this issue. other then that the wiring is stock.

 

As long as you know the wiring is good and it wasn't some installer.

This may/may not work on a '99:

Try a cluster self-test. Key off, press and hold the trip reset button. While holding the button in, turn the ignition on, but don't start the truck. Continue holding it for about 10 seconds, CHEC should show in the odometer window.

It should display some error codes.

 

oh i have tried this method, and tried an obd2 scanner and there are no codes present.

 

It's not going to check for OBD codes. It's a "cluster" test. If there are faults with the way the instrument cluster communicates it will display a code, not a P0XXX code.

 

oh ok i tried and it just went back to normal, still no bus. hm..

 

That's weird.

Did the gauges sweep and all the lights come on too?

 

Try wiggling the ecu connectors in the engine bay that goes into the ecu.

When I got the "no bus" my engine would die and wouldn't start till i wiggled the ecu wire. On the 5.9, the circuit board would crack overtime causing the truck to not start. In your situation, it could just be a bad connection. Try cleaning the terminals off the ecu if they look like they have corrosion.

 

yep, every light on the dash flashed as it should, the gauges did the test movements. and then back to no bus. its so weird.