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.
Specification: Refer to "Specification"
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
Remove the engine room front under cover (A).
Disconnect the Ambient Temperature Sensor connector (A).
Remove the Ambient Temperature Sensor (B).
Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.
Install in the reverse order of removal.