PCM/ECM no communication - Dodge Cummins Diesel Forum
- HOME - FORUMS - GARAGE - TECH - ARTICLES - CHAT - CLASSIFIEDS - REVIEWS - VIDEOS - MEMBER MAP - STORE - INSURANCE -
- REGISTER - CALENDAR - INFO - SITE HELP - RULES - STAFF - MEMBERSHIP - ADVERTISE - CONTACT US -


Welcome to the Dodge Cummins Diesel Forum, the fastest growing Dodge Diesel Community on the internet.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us
Go Back   Dodge Cummins Diesel Forum > 2nd Gen. Dodge Cummins 94-98 12V Forums > 94-98 Powertrain
94-98 Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

CumminsForum.com is the premier Dodge Diesel Truck Forum on the internet. Registered Users do not see the above ads.

Auto Insurance

» Featured Product
Wheel & Tire Center

Closed Thread
 
LinkBack Thread Tools Display Modes
Old 05-06-2011, 08:55 AM   #1 (permalink)
Newbie
 
Join Date: May 2011
Posts: 7
Thanks: 2
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
PCM/ECM no communication

Hey guys, I've never been registered here but I have used this site on numerous occasions with my truck.

The Problem:
I have a 96 2500 auto. When I'm driving my tranny will switch into 3rd gear and stay in 3rd until i restart my engine. Once I restart my engine I'll have all gears for about 2mins or until I slow back down to 3rd from overdrive.
I took it in to my buddies shop and he hooked up his snapon diagnostic tool and it cant communicate with the computer. My Tranny guys says its something electrical and I'm curious whether to replace the PCM or ECM or whether they are the same. Thanks for your help.

The Truck is for sale also.
96 cummins auto with only 90,000 with rebuilt tranny 15000 on it

Last edited by Twitchy; 05-06-2011 at 08:57 AM.
Twitchy is offline   Quick reply to this message
Sponsored Links
Advertisement
 
Old 05-06-2011, 09:14 AM   #2 (permalink)
Diesel Head
 
GAmes's Avatar
 
Join Date: Sep 2009
Location: Killeen, TX
Posts: 6,856
Thanks: 38
Thanked 781 Times in 689 Posts
iTrader Score: 6 reviews
You only have a PCM, ECMs didn't arrive until the '98 24valves. The most likely culprit, from my limited knowledge of slush boxes, is the throttle position sensor.
__________________
97 3500, 2 WD, G56, slightly bombed, A million+miles. Started the second million on 8/24/13
If you are lucky enough to be in Texas, you are lucky enough.
GAmes is offline   Quick reply to this message
Old 05-06-2011, 10:01 AM   #3 (permalink)
Newbie
 
Join Date: May 2011
Posts: 7
Thanks: 2
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
What's weird is I've hooked it up to two different scanners and they don't even communicate with the computer. Anyone know what causes that?
Twitchy is offline   Quick reply to this message
Old 05-06-2011, 07:26 PM   #4 (permalink)
Super Moderator
 
Join Date: Nov 2005
Location: Montana
Posts: 16,206
Thanks: 27
Thanked 2,101 Times in 1,567 Posts
iTrader Score: 0 reviews
It's because '96 and older have Chrysler's DRB programing.
'97 and newer have OBD programing which most scanners come with.
DRB software is very pricey.

You can also check your codes like this> Diesel Ram DTC's
__________________
Bill
'95 2500 4wd auto
'95 3500 5 speed heavy hauler
Stock for one day
illflem is offline   Quick reply to this message
Old 05-09-2011, 06:58 AM   #5 (permalink)
Cummins Nut
 
Join Date: May 2006
Location: Castroville, Texas
Posts: 459
Thanks: 1
Thanked 1 Time in 1 Post
iTrader Score: 0 reviews
I have a 98 that's doing the same thing with the scanner. Did y'all ever figure this out?
__________________
1998 2500 Ext Cab 12 valve Auto 4x4, 15.75*, Pensacola Stage 1s, 4" Turbo Back Exhaust, K&N Replacement Filter, Di Pricol Gauges, #10 Plate 1/2 back, Goerends Tranny w/ Triple Disk TC & new VB, w/ VBA
tachessher is offline   Quick reply to this message
Old 05-09-2011, 12:43 PM   #6 (permalink)
Diesel Head
 
MotorCityMadman's Avatar
 
Join Date: Nov 2006
Location: Manitoba, Canada
Posts: 1,613
Thanks: 76
Thanked 79 Times in 73 Posts
iTrader Score: 1 reviews
96 is OBDII
__________________
98 2500,4x4auto,48re vb,billet single,shift kit+, Killer B, 4" ss,#10 ff,4gsk,.024s, 5x.014, BHAF,16* gauges,WVO, B164 bypass 2004.5 3500, SRW, FASS WVO, B164 bypass, Edge@1 Sold 96 2500 eclb 3gsk
MotorCityMadman is offline   Quick reply to this message
Old 05-18-2011, 04:18 PM   #7 (permalink)
Newbie
 
Join Date: May 2011
Posts: 7
Thanks: 2
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
Its OBDII, for some reason the Scanner(Snap-on) wasn't picking up my truck. I took it back and now it does self recognize my Dodge. My mechanic said he had no idea why it worked now and not earlier.
Twitchy is offline   Quick reply to this message
Sponsored Links
Advertisement
 
Closed Thread

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Dodge Cummins Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 03:52 AM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.

SEO by vBSEO 3.3.2