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B27C2, B27C3 PTC HEATER OUTLET AIR TEMPERATURE SENSOR HAC-327 < DTC/CIRCUIT DIAGNOSIS > [AUTO A/C (WITHOUT HEAT PUMP)] C D E F G H J K L M A B HAC N O P YES >> GO TO 7. NO >> GO TO 2. 2. CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR POWER SUPPLY 1. Turn power switch OFF. 2. Disconnect PTC heater outlet air and A/C unit case temperature sensor assembly connector. 3. Turn power switch ON. 4. Check voltage between PTC heater outlet air and A/C unit case temperature sensor assembly harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> GO TO 5. 3. CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN 1. Turn power switch OFF. 2. Disconnect A/C auto amp. connector. 3. Check continuity between PTC heater outlet air and A/C unit case temperature sensor assembly harness connector and A/C auto amp harness connector. Is the inspection result normal? YES >> GO TO 4. NO >> Repair harness or connector. 4. CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR Check PTC heater outlet air temperature sensor. Refer to HAC-328, "Component Inspection" Is the inspection result normal? YES >> Inspection End. NO >> Replace PTC heater outlet air and A/C unit case temperature sensor assembly. Refer to 354, "Removal and Installation" 5. CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR OPEN 1. Turn power switch OFF. 2. Disconnect A/C auto amp. connector. 3. Check continuity between PTC heater outlet air and A/C unit case temperature sensor assembly harness connector and A/C auto amp. harness connector. Is the inspection result normal? YES >> GO TO 6. NO >> Repair harness or connector. 6. CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT + − Voltage (Approx.) PTC heater outlet air and A/C unit case temperature sensor as- sembly Connector Terminal M138 2 Ground 5 V PTC heater outlet air and A/C unit case temperature sensor assembly A/C auto amp. Continuity Connector Terminal Connector Terminal M138 1 M55 30 Yes PTC heater outlet air and A/C unit case temperature sensor assembly A/C auto amp. Continuity Connector Terminal Connector Terminal M138 2 M55 17 Yes |