Stand alone harness
Stand alone harness I am trying to test the 2000 5.3 harness that I made into a stand alone. I have the harness hooked up to my mocked up engine and have the harness powered and grounded. When I hook up my scanner to the new OBDII connector. The scanner connects but then won't read any data. After all that. My question is. Do I have to disable VATS before the ECU will recognize my harness and sensors?
No, but you will need to disable it to start it.
Try the scanner on another vehicle, if it works try another scanner. I've run in to certian scanners not working on certian vehicles. The other week I had a Snap On scanner keep ID'ing a 2004 Blazer as a 2004 Buick fwd car and couldn't talk to it.
Try the scanner on another vehicle, if it works try another scanner. I've run in to certian scanners not working on certian vehicles. The other week I had a Snap On scanner keep ID'ing a 2004 Blazer as a 2004 Buick fwd car and couldn't talk to it.
Make sure pin 5 on your data port is grounded common with the PCM ground. As in physically attach the black Pin 5 wire to one of the PCM grounds.
I've had the same problem in the past and that was the fix.
I've had the same problem in the past and that was the fix.
