Big Rigs Talk about other Cummins powered vehicles here. As a matter of fact, it doesn't even have to be Cummins, but it will be diesel! :)

Detroit Diesel 50 PWM

Old 09-02-2014, 06:36 PM
Registered User
Thread Starter
Join Date: Aug 2014
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Unhappy Detroit Diesel 50 PWM

Howdy All,

First post for me (YAY)

Does anyone know where the PWM valve is on a D50 motor! I've looked everywhere! I'm Stumped!

Its throwing Flash Code 63 which means short on the + Side however I cannot find it, I've spent hours researching, even trying to buy one so i can compare but no luck..

Thanks, Moose
moosemanusa is offline  
Old 09-03-2014, 11:17 PM
Registered User
2006BLKMegacab's Avatar
Join Date: Dec 2008
Location: Bashaw Alberta
Posts: 477
Likes: 0
Received 1 Like on 1 Post
Welcome to the DTR, from what I can decipher (I'm not a Detroit guy so I may not be much help) the PWM valve I tied into the turbo setup to control the VGT nozzles (but that may be the 60 series setup too)

I found the 8 page troubleshooting guide seen here:

hope it helps or someone smrter than me can actually help haha

Last edited by 2006BLKMegacab; 09-03-2014 at 11:18 PM. Reason: typo
2006BLKMegacab is offline  
Old 09-05-2014, 09:20 PM
Registered User
bjytech's Avatar
Join Date: Mar 2008
Location: Ohio
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Flash code 63 means that one of the PWM(Pulse Width Modulation) output wires from the ECM is either shorted to positive or a open circuit. I'm not familiar with the 50 series but here is a excerpt from a troubleshooting manual on flash code 63
bjytech is offline  
Old 12-30-2014, 05:04 PM
Registered User
Thread Starter
Join Date: Aug 2014
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
I Forgot I even posted up here, Thanks to Everyone..

The problem is these engines have many applications.

So far I've found the following

1 - PWM can be used to control a fan (Not in my case) - Fan is on the crank.
2 - PWM can be part of the Glow Plug System (Not in my case) - No Glow plug system, Uses Ether to start and pure compression.
3 - PWM is part of the EGR system (I dont have that either).

This motor has the Detroit Ether start unit, I've ordered a new can just incase its a flag triggered by an empty ether can (Standard install on this application).

I've read the DDR and D50 manuals, I cannot obtain the specific manual for the application as its on a bus and cities either throw the manuals away or staff take them and leave in their attic for ever
moosemanusa is offline  
Related Topics
Thread Starter
Last Post
Performance and Accessories 2nd gen only
05-23-2008 06:38 AM
General Diesel Discussion
01-12-2005 07:52 PM
General Diesel Discussion
11-29-2004 08:17 PM
General Diesel Discussion
07-28-2004 09:58 PM
General Diesel Discussion
04-28-2004 01:35 PM

Thread Tools
Search this Thread
Quick Reply: Detroit Diesel 50 PWM

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.