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FAIL SAFE FUNCTION
00 Normal - 11 Open INCAR Sensor circuit • Incar sensor • Harness or connector between incar sensor and A/C control assembly • A/C control assembly 12 Shorted INCAR Sensor circuit 13 Open Ambient sensor circuit • Ambient sensor • Harness or connector between ambient sensor and A/C control assembly • A/C control assembly 14 Shorted Ambient sensor circuit 15 Open water temp. sensor • Water temp. sensor • Harness or connector between water temp. sensor and A/C control assembly • A/C control assembly 16 Shorted water temp. sensor 17 Open thermistor • Pin thermistor • Harness or connector between evap. sensor and A/C control assembly • A/C control assembly 18 Shorted thermistor 19 Open or shorted temp. door potentiometer • Harness or connector between temp. door potentiometer and A/C control assembly 20 Defective temp. door potentiometer • Temp. door potentiometer 21 Open or shorted mode door potentiometer • Harness or connector between mode door potentiometer and A/C control assembly 22 Defective mode door potentiometer • Mode door potentiometer No. Item Failure FAIL SAFE Function 1 IN-CAR temperature sensor Open/Short 25°C alternate value control 2 Ambient temperature sensor Open/Short 20°C alternate valu e control 3 Thermistor sensor Open/Short -2°C alternate value contr ol 4 Water temperature sensor Open/Short -20°C alternate valu e control 5 Temperature door potentiometer Open/Short setup For 17°C to 24.5°C, set to maximum cooling 6 Mode door potentimeter Open/Short setup Vent mode, at vent mode |