Big Blue XK
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Registered: 09-2017
Location: Southeast Alabama.
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Key Re-learn procedures & other important information when replacing the PCM.
With so many Commander owners having to replace their PCM's, (Powertrain Control Modules) due to age & wear, I thought this information was
important enough to post here for easy reference;
1) First & foremost, replacement ECU's / PCM's must be specifically programmed to your Commanders VIN, or, they will not function properly.
2) An existing/working master key FOB is required.
3) The Transmission Control Module is integrated into the PCM, on Commanders with the 4.7L & 5.7L V-8 engines.
4) The PCM is attached to the right front, inner fender located in the engine compartment. See the diagram below which is for a 3.7L V-6 engine;
I've verified it's in the same location on my 4.7L V-8 and I assume it's in the same location on the 5.7L V-8;
5) There are specific Key Re-learn procedures when you replace the PCM; You can find them here;
Other important PCM installation information;
Also, here are few places you can order remanufactured ECU's / PCM's from;
https://store.allcomputerresources.com/20jecopcmecm7.html
http://www.autocomputerperformance.com/
https://www.fs1inc.com/jeep-ecu-ecm-pcm.html?enginesize=466&make=100&model=266&year=139
Keep in mind, some of these places may ask for a core charge until you return your old ECU/PCM to them;
allcomputerresources.com (The first link I posted) did not ask for a core charge, when I ordered my spare PCM, back on 12/14/2021.
I hope our community finds this information useful.
Last edited by Big Blue XK, 10/11/2023, 6:02 pm
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http://bthefloridacommandersclub.runboard.com
2008 Commander Sport; 4.7L Flex-Fuel V-8; QT-II 4WD; 105,XXX Miles
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1/6/2022, 7:46 pm
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