X-Type ( X400 ) 2001 - 2009
Sponsored by:
Sponsored by:

ECM Vs. PCM

 
  #1  
Old 05-15-2019, 08:25 PM
Junior Member
Thread Starter
Join Date: May 2019
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default ECM Vs. PCM

I have a 2004 Jaguar x-type 3.0 V6 I need a replacement PCM but when I look for the part all that pops up is ECM. Are these parts the same thing or no?
 
  #2  
Old 05-15-2019, 08:28 PM
Veteran Member
Join Date: Mar 2017
Location: Utah
Posts: 2,710
Received 324 Likes on 304 Posts
Default

A PCM or powertrain control module is different from an ECM or engine or electronic control module, even though most people believe the two are the same. Most modern or newer models only have a PCM, which controls all the engine functions, where the ECM only controlled certain parts of the engine.

Terminology is funny sometimes. Like people who use dementia and Alzheimers interchangeably. Dementia is a SYMPTOM of Alzheimers. Not all dementia is Alzheimer caused, although it's about 85%. Think of dementia is a cough, a SYMPTOM of the underlying cause that causes it.
 

Last edited by Dell Gailey; 05-15-2019 at 08:36 PM.
  #3  
Old 05-15-2019, 09:31 PM
Join Date: Dec 2009
Location: Decatur,TX
Posts: 7,796
Received 4,071 Likes on 2,670 Posts
Default

Jaguar/Ford refers to the PCM as a POWERTRAIN CONTROL MODULE.
The S-Type (when introduced) was a Ford thing and Ford did NOT want to pay licensing for a CAN bus.
They created a PTEC (PowerTrain Electronic Control) to contain the ECM/TCM in ONE unit and used a Ford gearbox (5R55N).

The acronym PCM refers to a combination ECM/TCM (covering the entire Engine/Transmission POWERTRAIN). No network is necessary because BOTH are controlled by a single unit!!

The introduction of the MY2002.5 S-Type did use a CAN bus because the ZF6HP26 needed one!!!!

X200 uses a PCM and the X202 uses a separate ECM/TCM.

As far as I know, the X200 was the ONLY Jaguar model to refer to the module as a PCM.

Hope this helps to clear things a little.

bob
 
  #4  
Old 05-15-2019, 10:20 PM
Junior Member
Thread Starter
Join Date: May 2019
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

What does x200 and x202 refer too?
 
  #5  
Old 05-15-2019, 10:31 PM
Junior Member
Thread Starter
Join Date: May 2019
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

Thank you!
 
  #6  
Old 05-15-2019, 11:15 PM
Veteran Member
Join Date: Mar 2017
Location: Utah
Posts: 2,710
Received 324 Likes on 304 Posts
Default

Model numbers, ours are x400
 
  #7  
Old 05-16-2019, 02:19 AM
Veteran Member
Join Date: May 2009
Location: Yorkshire, England
Posts: 23,206
Received 3,419 Likes on 3,030 Posts
Default

For this car I think you can use PCM & ECM as the same.

I believe PCM is a more standard term.

Cars are required to provide OBD via CAN nowadays (er, since 2006/2008 or so, depends a bit on jurisdiction) so it was just a matter of time on that.
 

Last edited by JagV8; 05-16-2019 at 02:22 AM.
  #8  
Old 05-16-2019, 02:44 AM
GGG's Avatar
GGG
GGG is offline
Join Date: Dec 2011
Location: Durham, UK
Posts: 108,643
Received 10,174 Likes on 8,376 Posts
Default

Originally Posted by Alexis Towns View Post
What does x200 and x202 refer too?
Factory model codes.

Originally these were prefix XJ (short for Experimental Jaguar) but the prefix was changed to X under Ford ownership from 1990.

X200 : S-Type Saloon, 1998
X202 : S-Type Saloon, V8

X400 : X-Type Saloon, 2001
X400R : facelift X-Type, 2004
X407 : facelift X-Type (abandoned)

Graham
 
  #9  
Old 05-16-2019, 09:01 AM
Senior Member
Join Date: Sep 2008
Location: Florida
Posts: 873
Received 63 Likes on 59 Posts
Default

Originally Posted by motorcarman View Post

PCM refers to a combination ECM/TCM (covering the entire Engine/Transmission POWERTRAIN).
That is it.
If you need one from junk yard, you can call it whatever, they will take your money anyway.
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
LAjag
S-Type / S type R Supercharged V8 ( X200 )
1
07-21-2018 02:20 AM
debi42k
S-Type / S type R Supercharged V8 ( X200 )
13
06-30-2018 04:26 PM
Jacsun
XK / XKR ( X150 )
1
07-11-2016 11:14 AM
mello12u
X-Type ( X400 )
2
03-29-2015 06:01 PM
mvenco
S-Type / S type R Supercharged V8 ( X200 )
2
10-12-2007 09:00 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Quick Reply: ECM Vs. PCM


Advertising
Featured Sponsors
Vendor Directory

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 Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: