Nissan 23781-4W001 IACV-Aac Valve

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Disconnect the electrical connector from the solenoid, connect a voltmeter to the harness connector's two terminals, turn the ignition key On, and switch on the air conditioning. Battery voltage should be indicated. Investigate potential circuit issues or problems with the air conditioning relay and ground circuits if necessary. Remove the solenoid, inspect the plunger for freedom of movement, and replace the solenoid if the plunger is seized or if the detent spring is damaged. Finally, reconnect the electrical connector and perform the remainder of the installation in the reverse order of removal.