1. Measure the temperature around the ambient temperature sensor and measure the resistance between the ambient temperature sensor terminal.

If the characteristics of the ambient temperature sensor are not as shown in the graph, replace the ambient temperature sensor.
Ambient Temperature Sensor Inspection [Full Auto Air Conditioner]
Ambient Temperature Sensor Removal/Installation [Full Auto Air Conditioner]Rocking the Vehicle
WARNING
Do not spin the wheels at more than 56 km/h (35 mph), and do not allow anyone
to stand behind a wheel when pushing the vehicle: When the vehicle is stuck, spinning
the wheels at high speed is dangerous. The spinning tire could overheat and explode.
This could cause serious injuries.
...
Climate Control Unit [Manual Air Conditioner]
Purpose
The climate control unit performs air conditioning according to the operation
by the users and the driving conditions of the vehicle.
Function
The climate control unit determines optimum air-conditioning based on the
input signals from each sensor and the control mo ...
PCM
Purpose/Function
High-level driveability and lower fuel consumption have been realized by
controlling the appropriate engine conditions (fuel injection/ignition timing)
according to operation conditions.
Controls each output part based on the signal from each input part.
...