DESCRIPTION The thermistor assembly is installed in front of the cooler condenser assembly to detect the ambient temperature, which is used to control the air conditioning system. This sensor is connected to the air conditioning amplifier assembly and detects fluctuations in the ambient temperature. This data is used for controlling the cabin temperature. The sensor sends a signal to the air conditioning amplifier assembly. The resistance of the thermistor assembly changes in accordance with the ambient temperature. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases. The air conditioning amplifier assembly applies voltage (5 V) to the thermistor assembly and reads voltage changes due to changes in the resistance of the thermistor assembly.
HINT: If the ambient temperature is approximately -52.9°C (-63.22°F) or lower, DTC B1412 may be stored even though the system is normal. WIRING DIAGRAM  PROCEDURE
(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) Read the Data List according to the display on the Techstream. Body Electrical > Air Conditioner > Data List
OK: The display is as specified in the normal condition column.
(a) Remove the thermistor assembly. Click here (b) Inspect the thermistor assembly. Click here
(a) Disconnect the G36 air conditioning amplifier assembly connector. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Can Communication System(for Hv Model): Open in Bus 4 Main Bus Line
DESCRIPTION There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 22 (CA2H) and 7 (CA2L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. Symptom Trouble Area Resistance between terminals 22 (CA2H) and 7 (CA2L) of the central gateway ...
