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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> On-Board Diagnostic [HVAC System - Full-Auto Air Conditioner System] >> DTC B1B71:11, B1B71:13 [Full-Auto Air Conditioner] >> Notes

DTC B1B71:11, B1B71:13 [Full-Auto Air Conditioner]: Notes

DESCRIPTION
  • B1B71:11
    • Evaporator temperature sensor circuit short to ground
  • B1B71:13
    • Evaporator temperature sensor circuit open
DETECTION CONDITION 
  • Malfunction in wiring harness between evaporator temperature sensor and climate control unit
FAIL-SAFE FUNCTION 
  • A/C output OFF is controlled when the evaporator temperature sensor input value is at 0 °C {32 °F}  .
POSSIBLE CAUSE 
  • Evaporator temperature sensor connector malfunction
  • Evaporator temperature sensor malfunction
  • Open circuit in wiring harness between climate control unit and evaporator temperature sensor
  • Short to ground in wiring harness between climate control unit and evaporator temperature sensor
  • Climate control unit connector malfunction
  • Climate control unit malfunction
SYSTEM WIRING DIAGRAM 
G08150852