Needing help with PCM connectivity 01 ST | Page 6 | Ford Explorer Forums - Serious Explorations

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Needing help with PCM connectivity 01 ST

No power at the obd2 port would make the scanner think the key is not turned
But didnt we verify power at the OBD2 port? I'll relook at it, but I know we verified something or other... continuity or voltage or both. And the fact that it went ahead and did the test other codes came up so makes me think that the obd2 is working at least some part of it.
 



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Yes voltage and continuity to pcm

Let me lookup those codes
PCM maybe fried? Can you think of any reason the pcm May have been shorted or? They usually do not just fail unless a voltage spike or water intrusion?
 






B1352 is key in code… issue with the key in chime wire which you said is disconnected… no big deal


B1359 is ignition switch / run circuit fault

There Maybe issue with ignition switch or wiring to and from.. which may help explain your radio power issue

The odd thing is this code comes from the pcm so it does appear that the pcm talking to the scanner

Ignition switch is not expensive and is pretty simple to replace really
 






B1352 is key in code… issue with the key in chime wire which you said is disconnected… no big deal


B1359 is ignition switch / run circuit fault

There Maybe issue with ignition switch or wiring to and from.. which may help explain your radio power issue

The odd thing is this code comes from the pcm so it does appear that the pcm talking to the scanner

Ignition switch is not expensive and is pretty simple to replace really
This is sounding nicer.... so new ignition comes with keys I assume, or can you have current key programmed to new ignition? I'm on the way to Oreillys to pick one up and try it. Hopefully dont have to have a locksmith to get it going...
 






Well, I go get the ignition, and get back to the ST and just thought I'd try the thing, and it clicked like battery wasnt charged enough, and I was shocked! This doesn't ever happen, so I grabbed my jumpbox andf the damn thing started! I undid the jumpbox, walked around the corner, when I came back, the thing had died, and would not crank of course.... checked the battery and it was at 7v How in the hell? It had 12.1 just 2 minutes earlier... Anyway, I'm switching out the ignitions when I notice this connector is loose, and it basically fell out of its mounting. Do you know what this is and what it does? It makes a connection to the ignition tumbler, and it is on the vehicle side of the connection, it isn't part of the cylinder, it makes a connection to the metal part of the cylinder. Could this be my problem? If it is, how does one repair it? It appears to have lost its retaining portion of itself.

ignition.jpg
 






The ignition switch is not the key and tumbler

The ignition switch is what the key and tumbler / Lock cylinder activate

Here is the ignition switch


Ignition switch is located on the steering column under the knee guard … the key pushes a rod that activates this switch. Switch is adjustable on its mounts so it must be lined up properly so that aux / off / run / start are in the correct positions

Sounds like your alternator is not charging
When running you should have 14.2-14.6 volts at the battery

Bad battery or bad terminals could explain a lot with the issues you have
 






The ignition switch is not the key and tumbler

The ignition switch is what the key and tumbler / Lock cylinder activate

Here is the ignition switch


Ignition switch is located on the steering column under the knee guard … the key pushes a rod that activates this switch. Switch is adjustable on its mounts so it must be lined up properly so that aux / off / run / start are in the correct positions

Sounds like your alternator is not charging
When running you should have 14.2-14.6 volts at the battery

Bad battery or bad terminals could explain a lot with the issues you have
Ok, calling things by the correct term may be amiss, agreed. I have a no crank issue. Yesterday, the first time in 100 tries, it for some reason or other cranked. AND started. while it was running I metered the battery, it was 14. something or other. So it isn't the alternator. New battery, AGM from Bass Pro Shops, it aint that. New terminals. None of these explain anything about my issues. I have a no crank issue. Is the blue contact in the picture I sent that connects to the key and tumbler when actuated something that needs to be addressed? It is loose and basically falls out of its detent. I can hold it in, but seems to have no effect either way. What is it? I can think of no way imaginable that a battery can go from 12.1 to 7.4 in 60 seconds. When before the vehicle died, it was charging at 14.1? Could these issues be coming from the plugs behind the multi position switch? When the tilt is used, the wires almost pull out, and some of the wires were loose (out) of the harness I pushed them back in, but could they not be part of the problem?
 






The Blue dealio is your key in chime wire. With the key in the little metal tab is grounded and you get a chime
Not the issue

Something very off! I agree
Bad battery? No way should voltage drop like that! Unless battery internally shorted or just plain bad. Do you have a different battery you can try?
 






The Blue dealio is your key in chime wire. With the key in the little metal tab is grounded and you get a chime
Not the issue

Something very off! I agree
Bad battery? No way should voltage drop like that! Unless battery internally shorted or just plain bad. Do you have a different battery you can try?
good to know about the blue thing.
The Blue dealio is your key in chime wire. With the key in the little metal tab is grounded and you get a chime
Not the issue

Something very off! I agree
Bad battery? No way should voltage drop like that! Unless battery internally shorted or just plain bad. Do you have a different battery you can try?
I went and bought a new ignition. It has to be installed with a obd2 device. Locksmith came out and couldn't do it because he couldn't connect the pcm. I would gladly replace the pcm in lieu of pulling my hair out daily with this thing. So regardless of what the issue is, is there some specific way to replace the pcm? I mean the obd2 port has voltage and continuity so doesnt it make sense to just replace the damn thing?
 






Ignition switch has nothing to do with a locksmith

Replacing the pcm means you would then need a matching pats key and pats module
 






Ignition switch has nothing to do with a locksmith

Replacing the pcm means you would then need a matching pats key and pats module
In the ignition I bought it said you had to have it installed with a computer thingy so that the keys that came with it would work. I dont need a locksmith to replace the switch, but a locksmith can add the keys to the vehicle right? I'm just saying because I had one come out and he couldn't add the keys because he couldn't access the PCM either. Just makes me think its the pcm.
 






The ignition switch is not the key and tumbler, it is not the key switch it is mounted up under the dash half way up your steering column

I have said this a few times
I even provided a link to what ignitio. Switch looks like
The key and tumbler activates the ignition switch with a pushrod

Your trouble code is for the igntion switch not for the key and tumbler /
Lock cylinder



If the keys you have are the same keys that came with the truck and the pcm there is no need for a locksmith

That goes back to the theft light
If the theft light blinks and then goes off when you turn the key to start then the pcm is happy with the key
 






The ignition switch is not the key and tumbler, it is not the key switch it is mounted up under the dash half way up your steering column

I have said this a few times
I even provided a link to what ignitio. Switch looks like
The key and tumbler activates the ignition switch with a pushrod

Your trouble code is for the igntion switch not for the key and tumbler /
Lock cylinder



If the keys you have are the same keys that came with the truck and the pcm there is no need for a locksmith

That goes back to the theft light
If the theft light blinks and then goes off when you turn the key to start then the pcm is happy with the key
I guess it takes a bit for it to sink in.... ok so I have all that straight now, for some reason, I think of a key and tumbler as an ignition switch. Thats funny, and you have said it a few times, even a pic of it, Sorry man
 






Not a problem!! It’s the interweb it’s not
Like I can stand there and point!

But we do the best we can! Ignition switches do Wear out! The computers sometimes tell us where to look and yours is telling us ignition switch issue so good place to start

There is info on the web on how to test the ignition switch when it’s in your hand too with your multimeter hahahahahaha
 






Not a problem!! It’s the interweb it’s not
Like I can stand there and point!

But we do the best we can! Ignition switches do Wear out! The computers sometimes tell us where to look and yours is telling us ignition switch issue so good place to start

There is info on the web on how to test the ignition switch when it’s in your hand too with your multimeter hahahahahaha
Well, I switch the ignition out.... no change. Accidentally left the key in on position overnight, so when a friend of mine came by to take a look at it, battery was a brick. I had a charged marine battery out back, so switched it out... as he is hooking up his OBDII thingie and looking at it, he just randomly tries to start it, and it starts. And has every time since that moment. I am like WTH? Anyway, yesterday I take it to my uncles cabin, and on the way back, I see smoke coming from the truck... I'm like what now? No gauges show issues, I so continue home... as I'm getting off the freeway, I hit the brakes and dont really have any, I'm like uh oh, get stopped, get home and put a laser thermometer on the hub (which is smoking) and its 500 degrees. Hose it down, remove the wheel, and drum and there is play in and out about 1/4" as well as able to rotate it a little both directions, this is passenger side. Remove driver side and no play either direction. Thoughts on THIS one?
 






Rear end needs brake work? Just a guess

Smoke was coming from rear brake area? Could be leaky axle seal or could need drum brake work

With both tires off the ground and or drums removed the axleshafts should move some and rotate a bit
 






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