DTC B1B71-15: Evaporator Temperature Sensor Circuit Malfunction [Dash-Electrical Supply Unit (Us)]: Outline

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DTC B1B71:15 [DASH-ELECTRICAL SUPPLY UNIT (US)] DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Evaporator temperature sensor circuit malfunction
Detection condition	The dash-electrical supply unit detects an open circuit in evaporator temperature sensor circuit.
Fail-safe	Fixes the evaporator temperature sensor input value at °C {32°F} and performs control.
Possible cause	Evaporator temperature sensor connector or terminal malfunction Evaporator temperature sensor malfunction Dash-electrical supply unit connector or terminal malfunction Open circuit in any of the following evaporator temperature sensor circuits Signal circuit Ground circuit Dash-electrical supply unit malfunction
Courtesy of MAZDA MOTORS CORP.