Home signal on a 2004 G35

I was having an issue with a build we did on a 2004 g35 where it would intermittently lose home signal on B1 cam position sensor. While it had both power and ground signal at all times from the ECU we noticed on our lab scope that whenever it would not start we would not have a pull up signal and when it did start it did have a pull up signal on the ECU pin. This was on a haltech Platinum Pro. The car did run flawlessly on the factory reflashed computer however. I guess my question is, does the cam sensor use a pull up sensor?