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Home >> Fiat >> 2016 >> 500 Turbo, Standard Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> (Heating & Air Conditioning - Electrical Diagnostics - 500 - Except Electric) >> DTC Troubleshooting >> B1905-15-Main/Left Temperature Door 1 Sensor Control - Circuit Short To Battery Or Open >> Possible Causes

Possible Causes

Possible Causes
BLEND DOOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
BLEND DOOR SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
BLEND DOOR SIGNAL CIRCUIT SHORTED TO 5 VOLT SUPPLY CIRCUIT
BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE   . 

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