Except U.S.A. And CANADA
1. Remove the check valve..
2. Verify that there is no airflow when positive pressure is applied to port A.

If there is airflow, replace the check valve..
3. Verify that there is no airflow when negative pressure is applied to port A.
If there is no airflow, replace the check valve..
Charcoal Canister
Check Valve Removal/InstallationA/C Unit Disassembly/Assembly
1. Disassemble in the order indicated in the table.
CAUTION:
If a non-specified grease is used, it may result in abnormal noise or improper
operation of the links. Apply only the specified grease to each link.
2. Assemble in the reverse order of disassembly.
...
Coupler Component Removal/Installation [Fw6 A EL, Fw6 Ax EL]
WARNING:
A hot transaxle and ATF can cause severe burns. Turn off the engine and wait
until they are cool.
Always wear protective eye wear when using the air compressor. If the air
compressor is used, any particles of dirt or soiling could spatter and get into
the eyes.
...
Refrigerant System Service Cautions
Handling Insufficient Refrigerant Level
If an insufficient refrigerant level is detected at troubleshooting, do
not charge (add) the refrigerant. Because an accurate amount of refrigerant
cannot be determined from the pressure indicated on the manifold gauge, never
charge the refrige ...