Cummins ISX Ambient Air Temperature Sensor Location

If you’ve noticed that the temperature inside of your vehicle isn’t staying consistent, or you’ve noticed a failure of your AC system - this could be an issue with the ambient air temperature sensor.
The ambient air temp sensor is a type of Thermistor, and it is used to provide input to automatic HVAC systems to help control the interior temperature of the equipment.
The sensor also provides the vehicle operators with the air temperature outside the vehicle. This information is beneficial when driving near freezing or freezing conditions.
What Is Cummins ISX Ambient Air Temp Sensor
Cummins ISX ambient temperature sensor, one of the most popular ones, is a top-of-the-line ambient air temperature sensor .
The sensor has high accuracy and low power consumption and is widely recognized as the most dependable and accurate sensor. It is the operator's connection to the outside air, allowing the machine to regulate the temperature inside the cab and inform the operator of the outside temperature.
Cummins ISX Ambient Air Temp Sensor Location
Locating the ambient air temperature sensor has been known to be a bit of a challenge if it’s your first time. It’s not easy to find information on where to locate this sensor, as it can get easily confused with the air intake manifold sensor or the Cummins ISX map sensor, but luckily you have found this guide.
The sensor is located by the mirror on the driver's side, in the air intake manifold.
How to Install Cummins ISX Ambient Temperature Sensor
Ensure the sensor is installed correctly and regularly maintained to provide accurate readings. Follow these steps to remove the old sensor and install the new one.
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Remove the air filter cover by removing the six bolts holding it
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Remove the top bracket nuts and the screws on the top and bottom of the mirror
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Unplug the wire harness attached to the sensor
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Remove the old sensor
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Carefully install the new sensor into the wire harness
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Replace screws, top bracket nuts, and air filter cover
Common Reasons for Cummins ISX Ambient Air Temp Sensor Not Working
If your Cummins ISX ambient temperature is not working correctly, some common reasons could be causing this:
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The sensor is damaged or broken
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There is no battery installed in the sensor
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The sensor is blocked by dirt or dust
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The sensor is disconnected from the wiring harness;
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The sensor is not calibrated correctly

Maintenance
Regular maintenance of the Cummins ISX Ambient Air Temp Sensor is essential to ensure it works correctly. The sensor should be checked for any signs of corrosion or damage, as this can affect its accuracy.
You should also inspect the wiring to ensure it is not damaged or frayed. You must clean the sensor of any debris or dirt that may have accumulated over time.
It is crucial to ensure that the readings remain accurate over a wide range of temperatures. In addition, you should recalibrate the sensor periodically to ensure that it provides accurate readings. You can do recalibration by connecting a multimeter to the sensor and then adjusting the readings until they match the expected values.
Ambient Air Temperature Circuit Components
The ambient air temperature circuit includes the following components:
Thermistor
A thermistor is a resistor whose resistance changes according to its temperature. When the temperature rises, the resistance decreases. Therefore, when the temperature drops, the resistance increases.
Resistor
A resistor is a passive electronic component that resists current flow. Its function is to limit the amount of current flowing through it.
Diode
A diode is a semiconductor device that allows electricity to pass in only one direction. In other words, it blocks reverse voltage.
Why Choose Cummins ISX Ambience Air Temp Sensor?
There are many reasons to choose the Cummins ISX sensor when searching for an ambient air temperature sensor. Using high-quality parts will ensure your equipment's safe and efficient operation over the long term.
High Accuracy
The Cummins ISX ambient sensor is highly accurate. It can detect the temperature accurately within 0.5°C.
Low Power Consumption
The sensor consumes less than 1 mA of power. This means that it does not affect the performance of the vehicle.
Easy Installation
You need to remove the old sensor and replace it with the new one. No soldering is required.
Durable
The sensor is made of durable material. It can withstand extremely high temperatures, up to 180°C.
Long Service Life
The sensor has a long service life. It can last 10 years or longer without requiring any maintenance.
Frequently Asked Questions:
How do I know if my air temperature sensor needs replacement?
If your sensor shows abnormal readings or isn’t functioning correctly, it may be time to change the sensor. If your AC system is malfunctioning or the temperature inside of your equipment is fluctuating more than usual, this can also be a sign of a faulty sensor.
If your sensor is still functioning normally, but the reading is inaccurate, it may also be time to change the old sensor.
What is the best way to check the accuracy of the air temperature sensor?
To check the temperature sensor's accuracy, you can use the calibration tool provided by Cummins.
Final Thoughts
A properly functioning ambient air temperature sensor is crucial to a safe and comfortable experience in your equipment. With a malfunctioning sensor, it’s possible to be exposed to dangerous temperature conditions inside your equipment.
Now that you know the Cummins ISX ambient air temp sensor location and how to install it, check out Heavy Duty Pros for your sensor needs.