fryed ecm

[the4wheeler]

99% shure I just fried my ecm. Jumpere cable sliped off the
post and made contact betwean ecm and positve post. Truck instantly died. And will not crank over. Even disconected every tbhing for baBout 20 min. Still nothing


So I thought a fiew years ago some one was selling spair ecms. Could some one point me to a vender? Searched off my phone did not show any. Results. Its for my 06 lbz manulal trans.

Luckley the truck is on my ranch. But looks like I'm on my street bike for a fiew weeks

 

[8100 Power]

So Cal Diesel has some I believe.

 

[Kat]

So Cal Diesel has some I believe.

X2 If you give him your vin# he can even flash your stock OS in :thumb:

 

[the4wheeler]

oh excellent thats good news

ill give Guy a call when i git my money scraped up


so any one know WHY GM would put such a sensitive piece of electronics so close to the recommend point of connection for jumpers and not have the hole ECM cover by plastic? ill guess the engineers who decided to put it there thought that jumpers slipping off could never happen sorry im a little irritated by GM and a bit at my self keep putting off buying the hard wire kit for jumpers

 

[Kat]

Pat wants to know if it cranks or the dash lights up at all? Do you have EFILive? if so Pat says you might want to try a full flash and see if it helps at all.

 

[the4wheeler]

no dash lights when i first turn the key but if i flick the key between "on" and 'crank" a fiew times the dash lights with come on kinda normal but still wont crank over

haven't tried to plug in Efilive yet if the rain lets up for a fiew ill see if i can git it to talk
ill keep you all posted if i git any communication

 

[x MadMAX DIESEL]

Please define the word "crank"

Crank, and turn over are the same thing.
Start is when the engine actually fires.

 

[the4wheeler]

when i turn the key to the "start or Crank " position nothing happens engine does not turn over,
after a few toggles between the On or Run Position and the Start or Crank Position the dash lights come on like there is life but the engine will still not turn over when key is turned to the "start or Crank " position.

hope this clears up any confusion.

 

[malibu795]

that sucks dave

 

[the4wheeler]

that sucks dave

a little but not as much as frying the ecm right at the beging of a week long heavy rain session hear and having nothing other than a motorcycle as a backup set of wheels

is a good thing i found my wetsuit LOL , well see how that goes tomorrow morning

 

[whitetrash21]

a little but not as much as frying the ecm right at the beging of a week long heavy rain session hear and having nothing other than a motorcycle as a backup set of wheels

is a good thing i found my wetsuit LOL , well see how that goes tomorrow morning

:nopic:

 

[LBZ]

Something about this problem bothers me and that is that it won't crank at all. When you turn the key, it is still a mechanical contact to complete the circuit which sends power down to the starter relay which sends power to energize the solenoid coil on the starter which causes it to move the pinion and start cranking.

What can keep this from happening in the circuit? The alarm system interupting ignition power? Blown ecm power supply or ignition power fuse? Does the ecm supply/control ignition power?

I'd dig a little into the fuse box and check the fuseable links and such to make sure everything is good there before jumping to the conclusion the ecm is bad.

IIRC bad ecm's in the past would still allow the engine to crank over, just not fire as they were not energizing the injectors-or signalling the FICM on the LB7/LLY's.

I could be off my rocker wrong though-it's happened before.......

 

[Cougar281]

The ECM commands the starter, so if it was totally dead, it could potentially not engage the starter.

Something about this problem bothers me and that is that it won't crank at all. When you turn the key, it is still a mechanical contact to complete the circuit which sends power down to the starter relay which sends power to energize the solenoid coil on the starter which causes it to move the pinion and start cranking.

What can keep this from happening in the circuit? The alarm system interupting ignition power? Blown ecm power supply or ignition power fuse? Does the ecm supply/control ignition power?

I'd dig a little into the fuse box and check the fuseable links and such to make sure everything is good there before jumping to the conclusion the ecm is bad.

IIRC bad ecm's in the past would still allow the engine to crank over, just not fire as they were not energizing the injectors-or signalling the FICM on the LB7/LLY's.

I could be off my rocker wrong though-it's happened before.......

 

[duratothemax]

Something about this problem bothers me and that is that it won't crank at all. When you turn the key, it is still a mechanical contact to complete the circuit which sends power down to the starter relay which sends power to energize the solenoid coil on the starter which causes it to move the pinion and start cranking.

What can keep this from happening in the circuit? The alarm system interupting ignition power? Blown ecm power supply or ignition power fuse? Does the ecm supply/control ignition power?

I'd dig a little into the fuse box and check the fuseable links and such to make sure everything is good there before jumping to the conclusion the ecm is bad.

IIRC bad ecm's in the past would still allow the engine to crank over, just not fire as they were not energizing the injectors-or signalling the FICM on the LB7/LLY's.

I could be off my rocker wrong though-it's happened before.......

nope.......not like the olden days, as dave said. A dead ECM will not even crank the engine.

 

[the4wheeler]

:nopic:

lol i dont think many people would think much of a biker wearing a wetsuit being that ventura is a big surfer community :spit:







yes it is defenetly not like the old days of direct key line to the starter motor
x 3 purity sure the key tells the ecm to roll over the crank over the motor might even be the key tells the BCM to tell the ECM to do it i cant say for shur on that,

wasent able to drag my gear out to the truck last night when i return home ill make a effort to do so to see EFI will talk to the ecm

 

[fast03]

That sucks Dave. Have you check battery voltage? Almost sounds like no power, cycling the key then the dash lights coming on slowly.

 

[the4wheeler]

That sucks Dave. Have you check battery voltage? Almost sounds like no power, cycling the key then the dash lights coming on slowly.

ill give that a check to be sure but was giting 12.XX on the suburban i was jump starting
( both vicheals not running when i looked at the gauge on the suburban. )

 

[motohed]

ecm is toast. if the check engine light or glow plug light don't come on, that means the ecm is dead. all my dash lights came on except for those. i did the same thing. spent hours trying to find a fuse or bad connection. efi wouln't link up with it either. got a new ecm and it fired right up

 

[paint94979]

mine was similiar.... turn the key over, NOTHING. Try a full flash if that doesn't work

 

[the4wheeler]

just tried to git EFIlive talking to it no dice

unable to connect , unable to git status , thats both trying to flash and read the ecm

wont connect under the scan tool eather none of the LED flash on the black box for communacation

and i try to do a black box read of the ecm err.2xx no data receved.

yea same thing going on like Motohed said lights come on but no glow or check engine

and of course my multi meeter is MIA so i can verify battery voltage. but high beems and 100w back up lights seem bright as normal when on


side note wetsuit worked grate this morning however boots did git a little soggy