How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask George H. Your Own Question
George H.
George H., ASE Certified Technician
Category: Saturn
Satisfied Customers: 806
Experience:  ASE Master Tech 15+ Years
Type Your Saturn Question Here...
George H. is online now
A new question is answered every 9 seconds

Ryan, John Wilde again, I bought the OTC 3111Pro, and

Customer Question

Hi Ryan, John Wilde again, I bought the OTC 3111Pro, and It's a nice tool, it has a fairly extensive library of manufacturers and models built in, and the screen is great. I now find,
(as I'm sure others have also) that the scanner is only as good as the diag program in the
manufacturers PCM, and in the case of the 02 Saturn they don't let me graph the EGR signal. Rats, that's exactly what I want to see, It's probable that the electronic EGR was only
on late models, and the programmers hadn't caught up before they discontinued the model.
Anyway, I've tested every signal that I can think of to enable the EGR operation, except the
speed indicator, the scanner can do that w/a drive test, & I'm figuring a way to test the EGR
feedback w/a DC meter, on the road. So the search continues. Tx, JW
Submitted: 6 months ago.
Category: Saturn
Expert:  Ryan Schott replied 6 months ago.
what model and engine? does it have a code?
Expert:  Ryan Schott replied 6 months ago.
anyways, black to a good ground red to the center pin of the EGR connector, KOEO you should see .15-1.0v. then driving so it activates voltage should sweep to 3.5-5.0v with no dropouts.
Customer: replied 6 months ago.
Engine is 1.9 L DOHC. I agree the EGR feedback is the place to check, hopefully I can get that done to morrow. Tx, JW.
Expert:  Ryan Schott replied 6 months ago.
Awesome keep me posted, if you have an old scope I can shoot you the connector views and you can manually waveform it also.

Related Saturn Questions