Nissan LEAF 2023 Owners Manual
6.5.5.1. System temporarily unavailable
If the vehicle is parked in direct sunlight under high temperature conditions (over approximately 40 C (104 F) and then started, the TSR system may be deactivated automatically. The [Not available High cabin temperature] warning message will appear in the Vehicle Information Display.
Action to take:
When the interior temperature is reduced, the TSR system will resume operating automatically.
Owners Manual