Engine-Codes - Toyota - B1412 2015 Toyota RAV4

B1412 2015 Toyota RAV4 Code - Ambient Temperature Sensor Circuit

- Code Popularity: 185 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1412 2015 Toyota RAV4?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Cooler Thermistor (Ambient Temperature Sensor)
  • Ambient Temperature Sensor harness is open or shorted
  • Ambient Temperature Sensor circuit poor electrical connection
  • Faulty Air Conditioning Amplifier Assembly

Code Tech Notes





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How to Fix the DTC B1412 2015 Toyota RAV4?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the B1412 2015 Toyota RAV4 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the B1412 2015 Toyota RAV4 Code Mean?

The Cooler Thermistor (Ambient Temperature Sensor) is installed in front of the condenser to detect the ambient temperature which is used to control the air conditioning system AUTO mode. 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 Cooler Thermistor (Ambient Temperature Sensor) 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 a voltage (5 V) to the Cooler Thermistor (Ambient Temperature Sensor) and reads voltage changes due to changes in the resistance of the Cooler Thermistor (Ambient Temperature Sensor). The combination meter assembly sends the read signal to the air conditioning amplifier via CAN communication.
The Diagnostic Trouble Code (DTC) will be set when the Air Conditioning Amplifier Assembly detects an open or short in the Cooler Thermistor (Ambient Temperature Sensor) circuit.

B1412 2015 Toyota RAV4 Code - Ambient Temperature Sensor Circuit

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