B1413

DTC B1413

Circuit Description

The evaporator temperature sensor (A/C thermistor) is installed on the evaporator in the air conditioning unit. The A/C thermistor detects the temperature of the cooled air passed through the evaporator. Its signal is sent to the A/C amplifier and is used to control the air conditioning. The resistance of the A/C thermistor changes in accordance with the temperature of the cool air passed through the evaporator. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.

The A/C amplifier applies 5 volts to the A/C thermistor and reads the voltage changes as the resistance of the A/C thermistor changes. This sensor is used to prevent the evaporator from freezing.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1413 Evaporator Temperature Sensor Circuit

Conditions for Running the DTC

This DTC shall run when the ignition is On.

Conditions for Setting the DTC

An open or short in the evaporator temperature sensor circuit.

Action Taken When the DTC Sets

The A/C compressor will be disabled.

Conditions for Clearing the DTC

The DTC will clear when conditions for setting the DTC have been repaired.