2001firehawk3

iTrader: (2)

About to get plates yanked if i dont get this fixed.

00 Trans am no communication with dlc using my launch scanner , emissions station count not communicate as well.
tried my scanner on 2 other cars to verify it works perfect.

I tested the port I have steady 12v power on orange wire,
I tested ground continuity on the 2 ground ports both check ok,
I removed pcm plug and tested data line from port to pcm and have continuity. tried with key on, tried with car running,

yes cig lighter works , yes I checked all fuses.

any ideas would be fantastic.. my brain is saying ecm not putting out data but car runs fine. searched old post without luck

Exeodus

iTrader: (1)

Do you have anything else plugged into the lighter ports drawing power while you attempt to use the OBD port, like a cellphone charger?

2001firehawk3

iTrader: (2)

no i even took the lighter out to be sure nothing was pulling power, scanner powers up so i know I am connecting to the ports power feed

ROCNDAV

iTrader: (100)

I use to experience this all the time, trying to connect HPTuners.

I started connecting a battery charger to my car battery, and never see the issue anymore. Coincidence? Maybe.

It's only superstition if it doesn't work.

D

2xLS1

iTrader: (25)

Any chance you have an after market alarm or remote start that splices into the purple data wire?

2001firehawk3

iTrader: (2)

well... wtf.. I put a charger on 10amp, hooked scanner up everything communicated perfect. rode over to emissions station with charger and a cord. the guy looked at me like I was crazy and kept saying no we cant do it with a charger on it.. no com without, convinced guy in office to let me hook up charger .. car passed.. Wow..silly 2 yr old redtop optima and original delco alt putting out 13.8 volts.. Thanks ROCNDAV

ROCNDAV

iTrader: (100)

Glad it worked out for you.