To prevent battery discharge
Vehicles without a smart key system:
HomeLink® will turn off if a door has not been opened and closed for 20 minutes or the engine switch is left turned off. (After which programming cannot be completed.) Open and close a door or turn the engine switch to the “ACC” position to turn HomeLink® on. We recommend programming while the engine switch is in the “ACC” position.
Vehicles with a smart key system:
HomeLink® will turn off if a door has not been opened and closed for 20 minutes or the “ENGINE START STOP” switch is left turned off. (After which programming cannot be completed.) Open and close a door or turn the “ENGINE START STOP” switch to ACCESSORY mode to turn HomeLink® on. We recommend programming while the “ENGINE START STOP” switch is in ACCESSORY mode.
Test yourself
A quick Toyota Camry quiz: every answer comes with an explanation and a link to the manual page.