Turn the ignition switch OFF.

Disconnect the ATS connector.

Measure resistance between the ATS terminals 1 and 2.

Check that the resistance is within the specification.

Turn the ignition switch OFF and disconnect the battery negative (-) cable.

Remove the under cover front pannel.

(Refer to Engine Mechanical System - "Engine And Transaxle Assembly")

Disconnect the connector, and then remove the ambient temperature sensor (A).

Install in the reverse order of removal.