I think that I may have been posting my question about the nobus or no bus fault that my 2001 CTD is having, so I will try it here and see if I can get some help diagnosing the problem.

The gauges all quit working just before the nobus message occurred. I have checked the two instrument cluster fuses and they are fine. Disconnected the instrument cluster and checked the connections and put dielectric grease on them, checked the main wiring plug in below the dash, above and left of the clutch pedal and put dielectic grease on all the pins, and still no gauges and a no bus message. I ran the self diagnostic feature on the odometer and it came up with codes of 900,920,921,940,950 and 999. I ran a scan tool on it and it came up with P1698. Basically all these codes refer back to the no bus or that there is a communications failure.

That being said, does anyone else have any knowledge of what might be the problem or what you have done to fix this problem in the past?

I think that I have narrowed it down to the Instrument cluster (most likely) or PCM. Can a dealer run a scan on it and tell me for sure which component the problem is in? Thanks in advance for you help! It is greatly appreciated! JGaff

 

I finally figured out that it was the Instrument cluster that has the problem. I took out the cluster and heated the printed circuit and soldier joint on the back with a hair dryer, and it started working, so apparently there is a break in the printed circuit or a soldier joint on the back of the instrument cluster. Not a fix, but at least it lets me know which part I need to replace. Hope this helps somone in the future!