Remove the EVAP canister.
Disconnect the FTP sensor connector (A).

Disconnect the hose (B), remove the retainer (C), and remove the FTP sensor (D).
Install the parts in the reverse order of removal with a new O-ring (E).
Heater Unit - Core Replacement Part-2
Remove the drain hose (A), then remove the mounting nuts and the blower-heater
unit (B).
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Dashboard Passenger's Tray Lid Removal/Installation
NOTE: Take care not to scratch the dashboard or its related parts.
Open the lid.
Remove the screws, then remove the passenger's upper tray lid (A).
...
Main Valve Body Disassembly, Inspection, and Reassembly (A/T)
Clean all parts thoroughly in solvent, and dry them with compressed air.
Blow out all passages.
Do not use a magnet to remove the check balls, it may magnetize the check
balls. ...