From the MTO commercial vehicle FAQ site, If you have a CVOR you need a logbook. If you are person-use, you don't need a CVOR, thus no logbook:
Q14: Do I need to fill out a daily log?
Ontario's hours-of-service regulation governs the maximum driving times and minimum off-duty times of commercial vehicle drivers (bus and truck) who require a Commercial Vehicle Operator's Registration (CVOR). They are based on the National Safety Code Standard 9.
Driver's must:
keep records of their daily driving and other work activities in a set format
provide these records to enforcement officials upon request
Q15: Is my pickup truck a commercial motor vehicle and does it need a CVOR?
The Highway Traffic Act considers all pickup trucks to be commercial motor vehicles, but a pickup truck only needs a Commercial Vehicle Operator's Registration (CVOR) certificate if it has an actual or registered gross weight of more than 4,500 kg.
A personal-use pickup truck means a pickup truck that:
is being used for personal purposes without compensation
has a manufacturer's gross vehicle weight rating of 6,000 kg (13,227 lb) or less, and is fitted with either:
the original box that was installed by the manufacturer, which has not been modified, or
a replacement box that duplicates the one that was installed by the manufacturer and has not been modified
is not carrying or towing a trailer carrying commercial cargo or tools or equipment of a type normally used for commercial purposes