Question

Can anyone tell me if a 02 jeep cherokee 4.0 ecm needs

Does the ecm need the bcm and tcm to function? Im not sure when they started using the data line system.

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Answer
Independent Module

These three modules are independent.

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Post was last edited on June 7, 2018 1:34 AM PDT

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Independent module

So in theory.. l should be able to take the ecm and all its sensors, and put them on a totaly different engine, and not have any serial buss codes?

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k

ppp

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Independent module

I dont know what ppp stands for

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Module

Yes, they are separate modules, but they communicate with each other. ie, if the TCM is getting garbage from the PCM, the trans is going to act up and set a code. And vice-versa.

Loren

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