1. Disconnect the negative battery terminal.
2. Remove the glove box.
3. Remove the center console.
4. Remove the dashboard.
5. Locate the heater core, which is usually located in the center console, behind the dashboard.
6. Disconnect the heater core hoses and electrical connector.
7. Remove the heater core.
8. Installation is the reversal of removal.
Note: This is a general guide and the exact steps may vary depending on the specific model and year of your Nissan Morano. It is recommended that you refer to the service manual for your specific vehicle for detailed instructions.