6.5L No Start and scanner says it does not have a ecm

[jdominguez]

im having trouble connecting my scanner it wont connect with the truck can someone help me out i bought the obd1 to obd2 adaptor whem i turn on the key i dont het power i need to turn on the truck in order to get power to the scanner and it says that it canot connect to the truck

 

[ak diesel driver]

Check your fuses

 

[jdominguez]

all ready did they are all good

 

[ak diesel driver]

Then you need to figure out why you don't have power to your DLC. Wiring diagram would be helpful

 

[dbrannon79]

i bought the obd1 to obd2 adaptor

what year is your truck? I see you mentioned obd1 to obd2 adapter. these ususally don't work. on a pre 96 (95 and older) there is no power wire in the ecm connector. you will have to supply power externally to the scanner if it doesn't have a built in battery to operate it. if your scanner is made for obd2 only and does not support obd1 systems, it wont work period. obd1 scanners are getting very hard to find nowadays unless you want to spend big money on something that supports them like to snap-on scanners. though on a 6.5 diesel enging, the snap-on scanners are not recommended and are known to give inaccurate readings especially when looking at the timing.

 

[MrMarty51]

what year is your truck? I see you mentioned obd1 to obd2 adapter. these ususally don't work. on a pre 96 (95 and older) there is no power wire in the ecm connector. you will have to supply power externally to the scanner if it doesn't have a built in battery to operate it. if your scanner is made for obd2 only and does not support obd1 systems, it wont work period. obd1 scanners are getting very hard to find nowadays unless you want to spend big money on something that supports them like to snap-on scanners. though on a 6.5 diesel enging, the snap-on scanners are not recommended and are known to give inaccurate readings especially when looking at the timing.

Would the GMTDSCAN work on this unit ?
Would need a computer to run the software.

 

[JMJNet]

It is a revival of an old thread so it is a bit confusing because the new poster problem is not exactly like the original poster.