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2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque
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What is PCM, TCM, and ECM??

This is a discussion on What is PCM, TCM, and ECM?? within the 2.4L LE5 Performance Tech forums, part of the Engine Technical Discussion category; What do all of these do??...

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Old 09-14-2009, 10:57 PM   #1
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What is PCM, TCM, and ECM??

What do all of these do??
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Old 09-17-2009, 01:27 AM   #2
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TCM is Transmission computer, PCM is powertrain computer, ECM is engine computer,

most cars have 3 computers,

TCM, ECM, BCM

where bcm is the body computer, all of them comunicate with each other
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Old 09-19-2009, 09:41 PM   #3
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Quote:
Originally Posted by senior_brown View Post
TCM is Transmission computer, PCM is powertrain computer, ECM is engine computer,

most cars have 3 computers,

TCM, ECM, BCM

where bcm is the body computer, all of them comunicate with each other
ok so which one is the best to upgrade??
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Old 09-19-2009, 11:10 PM   #4
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if you are auto getting a shift kit/tune for the TCM is a nice help. manual it is useless. the PCM/ECU is interchangable depending on what that manufactor wants to call things.
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Old 09-20-2009, 12:10 AM   #5
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TCM-Transmission Control Module
PCM-Powertrain Control Module
ECM-Engine Control Module

The best to upgrade is by far the ECM.
"Getting a tune"-->"upgrading" the engine's "brain" --> ECM.
Significant power gains depending on your application and power adders.
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Old 09-20-2009, 10:20 PM   #6
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Quote:
Originally Posted by cobalt9123 View Post
TCM-Transmission Control Module
PCM-Powertrain Control Module
ECM-Engine Control Module

The best to upgrade is by far the ECM.
"Getting a tune"-->"upgrading" the engine's "brain" --> ECM.
Significant power gains depending on your application and power adders.
ok so you know any site that carries them??
thanks!!
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Old 09-21-2009, 07:47 PM   #7
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Not off of the top of my head..are you looking to get a tune for the 2.4?
If you are, I wouldn't suggest getting a tune while you're stock.
LMK
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Old 09-23-2009, 09:16 PM   #8
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Quote:
Originally Posted by cobalt9123 View Post
Not off of the top of my head..are you looking to get a tune for the 2.4?
If you are, I wouldn't suggest getting a tune while you're stock.
LMK
my 2.4 is stock and i dont plan on doing any thing major to it for a WHILE
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Old 09-23-2009, 11:15 PM   #9
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Then you DON'T need a tune..
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Old 09-23-2009, 11:15 PM
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