So are you committed to going to live in Canada now? Why now if you weren't for the last 3 years?
If you try to go to Canada, chances are they will question your PR status when you arrive. If they do this, they may let you in but give you 30 days to appeal the loss of your PR status, either prove that you have not been outside Canada for more than 3 years or apply to keep your PR due to Humane and compassionate reasons if you have any. If this happens, it's unlikely that you will keep your PR status but you can agree that you have lost it and apply again if you still qualify under the new rules.
If they don't question your PR status and you get in, you can apply for a SIN and health care and look for jobs. What you should do is stay for a full 2 years in Canada without leaving and do NOT apply for a new PR card until you have your 2 years because then you would meet the residency requirements again. Immigration rules prevent them from checking further back than the last 5 years before you apply to renew.
Thank you for your answer.
I did not go to Canada because my wife was expecting a baby around May this year, and I did not want to leave her alone all around that period.
So you mean, if they stopped me when I enter custom, and I can appeal to keep my PR due to Humane? How long does that take after I appeal? Can I leave Canada during this period for a short time?