The room temperature sensor is installed in the instrument panel. It detects the cabin temperature to control the air conditioning AUTO mode. The
resistance of the room temperature sensor changes in accordance with the cabin temperature. As the temperature decreases, the resistance increases.
As the temperature increases, the resistance decreases.
The A/C amplifier applies voltage (5 V) to the room temperature sensor and reads voltage changes as the resistance of the room temperature sensor
changes. This sensor also sends appropriate signals to the A/C amplifier. The room temperature sensor is integrated with the room humidity sensor.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.
(e) Check the value(s) by referring to the table below.
Air Conditioner
OK:
The display is as specified in the Normal Condition column.
Result:
C -- REPLACE A/C AMPLIFIER
B -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE See: Heating and Air
Conditioning/Testing and Inspection/Symptom Related Diagnostic Procedures
A -- Continue to next step.
2. INSPECT ROOM TEMPERATURE SENSOR
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