[realmccoy312]

need help. did the research on this one and all pointed to pcm.
replaced pcm, still no bus. guages won't move check eng. light on.
engine spins over, no crank. any one have a fix that i can attempt?
i'll need a bus if i don't fix no bus.

 

[mthandt]

Find Txlen he is the computer guru from what I have seen. Me I would think it is either the crank position censor or the cam posistion sensor from what I've read.

 

[HemiDak]

The bus communication system is what sends information to and from various control modules. For instance, it is used by the gauges to read and interpret signals from the PCM, which happens to be the problem you're having. Since you already replaced the PCM, I suspect the gauges or wiring to be faulty.

 

[realmccoy312]

tks. YK2, is this also probable cause for the ignition wires not to fire at the plugs? I can remove instrument cluster and check guages for continuity.
as note, when instrument "recalibration" is attempted, i get errod codes 900,920,921, & 999. these all reference "cluster" not recg. data from pcm.
your thoughts greatly appreciated.

 

[txlen]

ok..my first thought is to unplug the crank sensor, turn off the key turn it back on and see what ya get...if ya want to P/M me yer vin and we can go from there...lol...but it's usually a sensor on the motor drawing your 5 volt reference down at the pcm when it shorted out.. i've done lots of crank sensors because of this...

 

[99dakota99]

my 99 dakota did and still does it every once in awhile , hasn't done it in awhile. but let me know what is really causing it. all i did is clean all of the contectors and it hasn't acted up yet.
tim

 

[realmccoy312]

i'm going to ask (cause it's quicker) but where is the crank sensor located. don't say on the crank,please. is it behind harm. balancer, etc...and what should i get when i switch accordingly? i'll try to locate and move forward.

 

[realmccoy312]

did as txlen suggested. guages worked. replaced sensor, problem solved. THANKS !!!!
as note: cleaning the sensor in this case would not be appropriate as txlen stated, it is a "short" situation. you could look at the end of the sensor and see discoloration at the wire.
great fix and cheaper than dealer costs.thanks all.

 

[txlen]

my 99 dakota did and still does it every once in awhile , hasn't done it in awhile. but let me know what is really causing it. all i did is clean all of the contectors and it hasn't acted up yet.
tim

if yer gonna try and clean the connectors then what i use in Easy Off oven cleaner...works great !!! ..lol.. glad to hear it was an easy fix... :drive:

 

[blk03rt]

i'm going to ask (cause it's quicker) but where is the crank sensor located. don't say on the crank,please. is it behind harm. balancer, etc...and what should i get when i switch accordingly? i'll try to locate and move forward.

It's located on the top of the bellhousing. Look down between the firewall and back of the motor on the passenger side. You should see the wires running to it.(at least that's where it is on my truck) As for what to get...just a new crank position sensor.

 

[Cazmo120]

This is a really old thread so dunno if I'll get an answer. But my dakota has been acting up like this. Saying NO BUS, and shutting off at random times. Now I know the issue is my fuse box, its cracked in half and held in place with tape. Its a Shitbox. But to continue "Safely" driving it, would it be easier to disconnect the fuse box, anything that I can pull thats grounded, harness and all that jazz. Get a used in shape fuse box with all those connections from a junk yard and swapping that in? Or would it be easier to cut a fuse box out of another Dakota and just repin everything? I know I need a "specialty" tool to do it.

 

[mrmarria]

So, what did you do about the fuse box?