Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSDODGE1993COLT L4-1468CC 1.5L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSAIR TEMPERATURE SENSOR ( AMBIENT / INTAKE )DESCRIPTION AND OPERATION
1993 Dodge Colt L4-1468cc 1.5L SOHC
Air Temperature Sensor ( Ambient / Intake ): Description and Operation
1993 Dodge Colt L4-1468cc 1.5L SOHCSECTION Description and Operation
PURPOSE
The intake air temperature sensor converts the engine intake air temperature into a voltage and inputs it to the engine control module, which then corrects the fuel injection rate, etc., based on the input signal.
OPERATION
The 5V power in the engine control module is supplied via a resistor in the module to the intake air temperature sensor. Via the sensor which is a kind of resistor, it is then grounded in the engine control module. The intake air temperature sensor resistor has such characteristic that its resistance decreases as the intake air temperature rises.
The intake air temperature sensor terminal voltage increases or decreases as the sensor resistance increases or decreases. Therefore, the intake air temperature sensor terminal voltage changes with the intake air temperature, decreasing as the temperature rises.
The intake air temperature sensor converts the engine intake air temperature into a voltage and inputs it to the engine control module, which then corrects the fuel injection rate, etc., based on the input signal.
OPERATION
Intake Air Temperature Sensor - Temperature To Resistance Curve:
The 5V power in the engine control module is supplied via a resistor in the module to the intake air temperature sensor. Via the sensor which is a kind of resistor, it is then grounded in the engine control module. The intake air temperature sensor resistor has such characteristic that its resistance decreases as the intake air temperature rises.
Intake Air Temperature Sensor - Temperature To Voltage Curve:
The intake air temperature sensor terminal voltage increases or decreases as the sensor resistance increases or decreases. Therefore, the intake air temperature sensor terminal voltage changes with the intake air temperature, decreasing as the temperature rises.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.