tuning issues/connecting ecm

[lopezjp]

I have usb aldl drivers 2.10 and will test the volts for the m slot tomorrow, once I get my multi meter back and let you know what happened.
Thanks for the info

[lopezjp]

I tested the m port and Im only getting1.50 volts,I also did not see any breaks in the wires. Any ideas on why I am not getting 3-6 v?

[GaryDoug]

First, I should have mentioned this is DC volts. If you measured using the DC setting on the meter, continue reading, otherwise repeat the measurement.

That is probably why you can't connect. Most likely, one of the 3 devices (PCM, ABS, and SIR/airbags) on the data bus is dragging the voltage down due to a partial short. The only way to find which one is to unplug them one-at-a-time and see which disconnection restores the voltage to over 3 volts. The ABS module is under the left end of the instrument panel. There are two connectors, one larger than the other. Unplug both, then check the voltage again with the ignition on. If it is still low, leave the ABS module unplugged and unplug the PCM's four connectors. Measure again. If still low, the SRS "DERM" module may be at fault. I think that is behind the glove box. You would have to remove the AIRBAGS fuse and wait 30 minutes before doing anything. I suggest before proceeding, you wait for more opinions on unplugging the DERM, because I have no experience with that in a real car.

[lopezjp]

Thanks for the info, I will try these step when I get back from my tdy and give an update.