Hey, funair02, what sensors do these codes originate from?

 

I have photographed part of my '01 FSM manual for the Dodge van. The sections include COMPONENT LOCATIONS, CONNECTOR PINOUTS and SCHEMATIC DIAGRAMS, about 37 pages.

If this is a violation of any rule on this forum, please tell me.

I zipped the individual files and maybe you can download the complete file...

If this helps anyone I would appreciate some feedback

Friar Tuck...

appreciate your feedback, but looking through my FSM I find nothing called joint connector 7... although I suspect in my case for my van using this FSM I refer to page 230 figure 10.4 pins 9 and 10 of C1, which is at the back of the instrument cluster. This pair of wires moves thru the dash and connects with several other things (PCM, CTM, DLC, CAB, & ACM) shown in figure 10.7 on page 231.

PCM= powertrain control module
CTM= central timer module
DLC= data link connector
CAB= controller anti-lock brake
ACM= airbag control module

Let me know your thoughts...

thx

I SHOULD HAVE AN improved version of the manual download available soon with better/clearer photos....
SEE NEXT MSG

 

this is the clearer/better imaged pdf file...
alloro helped me clean up my original file and thanks to him for that effort...
this is my second effort and after learning from alloro what could be done, I know this is an easier to read file.
It should print out on standard paper size.
I had to break it into two parts to keep the file size under the limits.
I hope this helps someone.

The sections include COMPONENT LOCATIONS, CONNECTOR PINOUTS and SCHEMATIC DIAGRAMS, about 37 pages.

 

appreciate your feedback, but looking through my FSM I find nothing called joint connector 7... although I suspect in my case for my van using this FSM I refer to page 230 figure 10.4 pins 9 and 10 of C1, which is at the back of the instrument cluster. This pair of wires moves thru the dash and connects with several other things (PCM, CTM, DLC, CAB, & ACM) shown in figure 10.7 on page 231.


this connecting point is JOINT CONNECTOR 7. ALL THESE CONNECTIONS SHOULD BE SHOWN IN A BOX ON THE DIAGRAM, AND OUT TO THE RIGHT OF THE BOX IT SAYS JOINT CONNECTOR 7.


I am looking at the FSM for my '01 Ram truck. The pages are different from yours. I am in the wiring diagram section 8-30 FUEL/IGNITION SYSTEM. Joint Connector 7 is listed in the index on the first page of that section. On page 15 of the section it shows all the CCD connections.

 

I downloaded your two files. I see what you're talking about. Do you have the Field Service Manual also, or just the Body Diagnostic Procedures? Here's a link to the FSM: https://docs.google.com/open?id=0BwD...Vhqcm93M0lEM1E

 

The originate from the cluster...

 

Well, actually something has to tell the PCM to set these codes, I guess. I was wondering if it was some sensor input to the PCM.

 

OK funair02...

let me ask the question again a little bit different...

when the instrument cluster check says error 920 and 921 what sensor(s) make the cluster display those errors?

your answer was the cluster, and that does not seem right... where are the sensors in the cluster?

In my case I think that an interruption in the data bus wire pair somewhere was not allowing information on the bus to communicate with the cluster causing those errors and my Scan Gauge was not functional when I had a NoBus fault. The NoBus indication tells me the bus is not functional, and if it is not functional the van will not run. The cluster errors went away when NoBus went away and my hooked up Scan Gauge was functional again.

 

Is there a way to ohm out the 2 buss wires between 2 modules at the time and see if there is a connection gone bad?
I hope the NO BUSS is gone for good, and I guess it is a waste of time now to be running continuity (let the sleeping dog lie).
But, inquiring minds..... Would just love to know how that buss is constructed. Almost makes me want to go to a junkyard.

 

Friar...
My NoBus condition has now come back... warmer weather... that is consistent with my attempt to drive back from FL in March... when I left it was cool and rainy, van died a couple of times in 125 miles but restarted easily. Finally it stopped raining and the sun came out, and then my NoBus problems started just north of Dothan, AL until it died and would not restart.

I have gone to each of the twisted pair connected modules on the bus... bus wires are VT/BR and WT/BK (they call it a twisted pair of 18 ga wire)... CONNECTED MODULES ARE: (see FSM pic below)
1. airbag control (under drivers seat)
2. Data Link Connector
3. Instrument Cluster
4. Central Timer Module (under radio)
5. Controller anti-lock brake (that one was tough as it is located deep under battery tray... have to remove battery, PDC and washer fluid jug)
6. PCM

My handwritten notes with pinout connector numbers are shown in second pic below.

I did continuity check from every location to the DLC on both wires... all checked good. All pins were shiny bright, but gave them a shot of DeOxit anyway. The bus wires are just part of the cable harness bundle... nothing special about them. FSM says there is supposed to be a twist every inch and 3/4, but that was not followed very strictly at the factory (a lack of twist mostly at each connector)... but it has worked for 15 years so I guess it was good enough. I found that pair went through the firewall at connector C205, a big connector with about 3/4 of the harness wiring, located just above drivers left foot.