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Symptom: EVAP TEMP SENSOR OPEN (ACTIVE) - ATC When Monitored and Set Condition: EVAP TEMP SENSOR OPEN (ACTIVE) - ATC When Monitored: With the ignition on and the IOD fuse installed. Set Condition: This DTC will set if the ATC detects an abnormally high voltage on the evaporator temperature sensor signal ckt. Evap Temp Sensor Open is also displayed as a POSSIBLE CAUSES EVAP TEMP SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE EVAP TEMP SENSOR SIGNAL CIRCUIT SHORTED TO FRONT BLOWER MOTOR CONTROL CIR- EVAP TEMP SENSOR SIGNAL CIRCUIT SHORTED TO REAR BOOSTER FAN CONTROL CIRCUIT AUTOMATIC TEMPERATURE CONTROL (ATC) EVAP TEMP SENSOR SIGNAL CIRCUIT OPEN SENSOR GROUND CIRCUIT OPEN EVAPORATOR TEMPERATURE SENSOR TEST ACTION APPLICABILITY 1 Turn the ignition off. All Yes → Repair the Evaporator Temperature Sensor Signal circuit for a short to voltage. No → Go To 2 2 Turn the ignition off. All Yes → Repair the Evaporator Temperature Sensor Signal circuit for a short to the Front Blower Motor Control circuit. No → Go To 3 581 HEATING & A/C |