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-   -   obd2 connector help (https://67-72chevytrucks.com/vboard/showthread.php?t=704705)

lilrobo 04-19-2016 07:40 PM

obd2 connector help
 
guys i have a 55 with a 5.3 from a 06 truck and computer from 02 camero ,, all has been great , i have loaded tunes and played with it tons ,, i did a push button start and now i cant load a tune, it says cant connect and to check connection ,, i can scan and do log runs , so i think i am linking up to ecm ??
i have 4 wires
purple = data
black = ground = chassis
blk/wht = ground = signal
orange = battery
the ground check out i check with ohms all good , the orange is 12 volts hot all the time ,, how do i check the data port ? i dont understand nothing changes when i go in to acc mode . or what is suppose to happen that mode

thanks

Hart_Rod 04-20-2016 02:20 PM

Re: obd2 connector help
 
Quote:

Originally Posted by lilrobo (Post 7566465)
guys i have a 55 with a 5.3 from a 06 truck and computer from 02 camero ,, all has been great , i have loaded tunes and played with it tons ,, i did a push button start and now i cant load a tune, it says cant connect and to check connection ,, i can scan and do log runs , so i think i am linking up to ecm ??
i have 4 wires
purple = data
black = ground = chassis
blk/wht = ground = signal
orange = battery
the ground check out i check with ohms all good , the orange is 12 volts hot all the time ,, how do i check the data port ? i dont understand nothing changes when i go in to acc mode . or what is suppose to happen that mode

thanks

It sounds like a wiring problem. Are you sure you didn't mess up the "data" wire when you installed your push button start?

lilrobo 04-20-2016 04:44 PM

Re: obd2 connector help
 
no i am not ,, right now the 4 fuses under the hood that came with the harness are dead in the acc mode ,, now after i start they are hot ,, i am able to read and scan the ecm after its running
i have a acc wire messed up somewhere
thanks

lilrobo 04-25-2016 08:23 AM

Re: obd2 connector help
 
all good wiring issue with my push button ,,,, now i need to figure out shifting in the tune

thanks


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