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Home >> Ford >> 2012 >> Focus Electric >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Climate Control System -- Except Electric) >> Diagnosis and Testing >> Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) >> Diagnostic Routine(s) >> B1B71:21, B1B71:22, B1B71:2F >> Normal Operation and Fault Conditions
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Normal Operation and Fault Conditions

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Refer to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) - System Operation and Component Description  .

DTC FAULT TRIGGER CONDITIONS

DTC Description Fault Trigger Conditions
B1B71:21 Evaporator Temperature Sensor General Signal Failures Signal Amplitude < Minimum This Continuous Memory Diagnostic Trouble Code (CMDTC) and on-demand DTC sets when the BCM senses lower than expected voltage from the evaporator temperature sensor.
B1B71:22 Evaporator Temperature Sensor General Signal Failures Signal Amplitude > Maximum This Continuous Memory Diagnostic Trouble Code (CMDTC) sets when the BCM senses greater than expected voltage from the evaporator temperature sensor.
B1B71:2F Evaporator Temperature Sensor General Signal Failures Signal Erratic This on-demand DTC sets when the BCM senses erratic voltages from the evaporator temperature sensor.
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