If you are pip'ed, you are better of doing nothing and use office hours to look for a new job. Once pip'ed you are unlikely to get ranked higher than Q4 (more likely Q5) in the foreseable future even if you make it past the PIP
This is the best advice you can get regarding being put on a PIP. I don't know one person who either wasn't let go or got stuck in their position after a PIP.