2004 Explorer - no communication to any computer/module

Does it crank? Did you check all the fuses? Is there some way to bypass the anti theft system? Examine all the wiring. If lightning is following the wiring then it might blow through the insulation to ground and cause an open at that point. The wiring could appear damaged in a spot like that. Maybe checking for voltage at different points would help isolate a problem. Of course the modules could be damaged also.

Wow, a totally fried system or 'you' have a dead computer in your scanner....

Forget the alarm, if the components won't individually test, they are cooked. Was the vehicle insured?

Mike

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Have you checked that the ALDL is getting a Bat + and a Neg feed??

would be my first step.......AFTER checking fuses on a no communication.

IF......you're not getting the positive or ground signal at the ALDL.........NOTHING will comunicate. I've seen it many times.

anywhooooooo........ need to ck that first.

~:~ MarshMonster ~:~

Sorry for my late follow up. It turned out that my scanner can not communicate with this vehicle, I don't know why. Two days looking for something that doesn't exist... damned! The Ford dealer programmed the new (used) PCM and the truck started. The ABS and traction light didn't turn off, so we changed the ABS module as well.

Thanks for all the suggestions, I had tried pretty much all before. However, I could finally convince my boss to take a couple thousand bucks in his hand and buy a new scanner. I was worth all the trouble ;)

-Kai-

Because the 2004 Explorer uses the CAN protocol, and you are trying to communicate with it using a Snap-On MT5100 (a tool which doesn't even exist)

Much like that scan tool.

A few thousand would be minimum asking price for a new, modern, and capable scanner.

Toyota MDT in MO

It seems that you are asking me a rhetorical question about your scanner; one which you already know the answer. Help me out then, and let me know what 'your scanner' is along with which vehicle the "it" refers to. Also, what exactly is a 'can key' in this instance?

In the mean time, note that the OP expressed communication concerns with the PCM and ABS modules (both 100% CAN), the IPC (uses CAN for scanner communication), and the RCM (not CAN, but perhaps his outdated and non-existent Snap On MT5100 wasn't capable of airbag comm anyway, or it could have been a typo, or it could have been operator error, etc...) Likely a PDS or IDS did the trick at the Ford dealer.

What the OP did wrong was to use substandard tooling to repair an issue where existent and accurate info would have led him in the correct direction (i.e. the capability to communicate with and correctly program the replacement PCM). I have no doubt that he could have performed the repair accurately and efficiently with correct tooling.

Toyota MDT in MO

Thank you. Here's a quote from my last post: "...and the RCM (not CAN, but perhaps his outdated and non-existent Snap On MT5100 wasn't capable of airbag comm anyway, or it could have been a typo, or it could have been operator error, etc..." RCM = Restraint Control Module = airbag system which uses ISO 9141 line, commonly accessible on most if not all scanners.

So... your BDM Pro really didn't communicate on the CAN bus of a 2004 Explorer without the CAN key, correct?

Toyota MDT in MO, (forced hybrid bottom poster)

uses

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buy a MODIS...............

and that's all i gotta say bout that.

~:~ marsh ~takes a toke~ ~:~

ch uses

Thanks Marshy, but I don't need a Modis, though I'd happily take one if'n they're bein' handed out :-)

Toyota MDT in MO (ahhh, back to standard bottom posting!)

Nicely done!

Comboverfish did a superb job of explaining why that is. How is it you still don't get it?

BDM Amateur.

Toyota MDT in MO