Follow the Canada Customs signs up the escalator and along the corridor.
Clear Canada Customs with checked baggage. Follow the "Domestic Connections" signage.
Follow the corridor and take the escalator down into Canada Customs and Immigration.
Have all documentation in hand and ensure all applicable forms have been completed.
Claim checked baggage immediately following passport inspection.
Clear Canada Customs with checked baggage.
Continue to the Air Canada Connection counters and drop off checked baggage after the first set of doors exiting Canada Customs.
Follow the 
signage to continue up one level for domestic departures.
Proceed through Passenger Pre-Board Screening and continue to your departure gate.
Download the printable "Getting AroundOpen PDF file " brochure which contains directions for all types of connections within this airport.