Quote:
Originally Posted by kang
No, you don’t start counting once you reach 20-30 steady. As far as I know, you need to go from step 1 to step 2 immediately. You can’t idle for 2:10, drive at 10 MPH for 5 minutes, and THEN accelerate to 20-30 MPH for 3:15. Same thing for the rest of the steps. This is what makes it so difficult to get the readiness codes set. You need to do the correct sequence EXACTLY. There is no room for deviation. If you can’t do it starting cold from your garage, you need to find a place where you can park the car overnight, so that it gets cold, and then do the entire sequence starting from that location. This means no gaps. You need to do the 20-30 MPH for 3:15 and then immediately go to 40-60 for 15 minutes. If you drop below 40 during that 15 minutes, forget it, you’re done. Start over another day. Finding a location where you can do the entire sequence, from a cold start, without gaps, is nearly impossible. Maybe you could do it on a dyno, if you strapped your car on it the night before your run.
It’s crazy, I know. So do the referees. That’s why you skip trying to set the codes and go straight to the referee.
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This is NOT true from my experience (and others I've talked to about it). I've only had to do the procedure twice but it worked both times for me. Consider each one a step, you don't have to go directly from step 2 to step 3, you can wait until the road permits. The only trick is to NOT go over 3k RPM or 65 mph in between steps.
By the way the original "formula" came from BMW.
http://srlx.com/p-car/obdii_readiness.pdf