Two women were walking by the vehicle at Lakeshore Avenue East and Queens Quay at around 4:25 p.m. when they heard the child crying inside.
They called police, and fire crews eventually broke the rear window to get the child out.
Police estimated the child was two years old.
The toddler was taken to the Hospital for Sick Children as a precaution and is doing well. The parents were reunited with the child and were to be questioned by police.