Multiple Codes Possible ECM?

[George Owens]

It could be. I figured since it happened with a bump, it might be cables... You know what, why don't you try reseating the connectors to the ECM and BCM? The grounds and cables could have cause a loss of communication, but so could the connectors being jarred. For that matter, even the under hood fuse box could be the source.

Also when you say re Seat you mean unplugged and replug? Will that cause me to have to do some type of re-learn if I unplug the PCM or the BCM?

 

[swathdiver]

Also when you say re Seat you mean unplugged and replug? Will that cause me to have to do some type of re-learn if I unplug the PCM or the BCM?

Yes and no. Just do it with the key off.

 

[iamdub]

pretty much all of these codes popped up. the dashboard it was acting weird, doors was locking and unlocking by themselves. Was shifting hard between first and second and wouldn’t go over 35 mph. My question is would the negative battery cable cause all of this ? Pretty much the same thing happened about four years ago when I replace the negative battery cable only difference is I didn’t get a chance to see if there was codes on it back then. This started happening last week, then it was fine all week and it started one time today. Now it seems to be acting fine again I’m really lost any and all suggestions would be appreciated …… also I believe something could be loose but I don’t know where to start. Was driving fine and I hit a pothole and everything immediately start acting up

With it idling in your driveway and not acting up, use a rubber mallet to bump on the PCM and the harness connectors. Knock on that large main harness. Remove the cover and knock sideways on the fuse & relay panel from all the sides you can access. Give a few sharp tugs to the battery ground cable, knock on the battery (failed internal connection). Maybe start all this knocking at the battery. Knock on the BCM and shake the surrounding harnesses.

Consider it a blessing that you were able to pinpoint the event following a rough jolt when you hit that pothole.

 

[rockola1971]

View attachment 373923Ok so this is the omhs at pin 6 and 14 which is supposed to tell me there is good connection to the ecm I got to do further testing I only had a few mins cause I’m still at work.

This looks atleast 2x higher than it should be. I would expect roughly 2-3 ohms to ground including the resistance of the meter leads.