AIR CONDITIONING SYSTEM DIAGNOSTIC TROUBLE CODE CHART

AIR CONDITIONING SYSTEM
DTC No.	Detection Item	DTC Detection Condition	Link
B1245	Lost Communication with Wiper ECU LIN	Lost communication with windshield wiper relay assembly	Click here
B1279	Lost Communication with Humidity/Rain Sensor LIN	Lost communication with air conditioning thermistor assembly	Click here
B1373	Lost Communication with Wiper System LIN BUS	Lost communication with wiper system LIN communication line	Click here
B1411/11	Room Temperature Sensor Circuit	Open or short in room temperature sensor circuit	Click here
B1412/12	Ambient Temperature Sensor Circuit	Open or short in ambient temperature sensor circuit	Click here
B1413/13	Evaporator Temperature Sensor Circuit	Open or short in evaporator temperature sensor circuit	Click here
B1423	Pressure Sensor Circuit	Open or short in air conditioner pressure sensor circuit Refrigerant pressure on high pressure side is extremely low (176 kPa (1.8 kgf/cm², 26 psi) or less) or extremely high (3025 kPa (30.8 kgf/cm², 439 psi) or more)	Click here
B1441	Air Mix Damper Control Servo Motor Circuit (Passenger Side)	Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates No. 2 air conditioning radiator damper servo sub-assembly	Click here
B1442	Air Inlet Damper Control Servo Motor Circuit	Air inlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 blower damper servo sub-assembly	Click here
B1443	Air Outlet Damper Control Servo Motor Circuit	for LHD: Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly for RHD: Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 2 air conditioning radiator damper servo sub-assembly	Click here
B1446/46	Air Mix Damper Control Servo Motor Circuit (Driver Side)	Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates No. 2 air conditioning radiator damper servo sub-assembly	Click here
B1448	Passenger Side FACE Servo Motor Circuit	for LHD: Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 2 air conditioning radiator damper servo sub-assembly for RHD: Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly	Click here
B1449	Rear Air Outlet Damper Control Servo Motor Circuit	Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates No. 3 air conditioning radiator damper servo sub-assembly	Click here
B1471	A/C Inverter High Voltage Power Resource System Malfunction	Open or short in A/C inverter high voltage power resource system Boost inverter malfunctioning	Click here
B1472/72	A/C Inverter High Voltage Output System Malfunction	Open or short in A/C inverter high voltage output circuit	Click here
B1473	A/C Inverter Start-up Signal System Malfunction	Open or short in A/C inverter start-up signal circuit	Click here
B1474/74	A/C Inverter Malfunction	A/C inverter malfunction	Click here
B1475	A/C Inverter Cooling / Heating System Malfunction	A/C inverter temperature outside specified range (temperature too high) or open or short to ground in temperature sensor circuit	Click here
B1476/76	A/C Inverter Load System Malfunction	Motor rotation load while compressor is operating is too large or too small	Click here
B1477/77	A/C Inverter Low Voltage Power Resource System Malfunction	Open or short to ground in inverter control power voltage circuit	Click here
B1497	BUS IC Communication Malfunction	Error or open in communication line	Click here
B1498	Communication Malfunction (A/C Inverter Local)	Error or open in communication line between the hybrid vehicle control ECU and compressor with motor assembly High-voltage power source shut off	Click here
B14A8	Glass Temperature Sensor Circuit	Open or short in glass temperature sensor circuit	Click here
B14A9	Glass Surroundings Temperature Sensor Circuit	Open or short in glass surroundings temperature sensor circuit	Click here
B14AA	Glass Humidity Sensor Circuit	Open or short in glass humidity sensor circuit	Click here
B14B2	Lost Communication with Front Panel LIN	Lost communication with air conditioning control assembly	Click here
B14B8	Refrigerant Shortage	When following condition is detected in refrigerant shortage check in normal operation: Amount of refrigerant is insufficient	Click here
P1C7C49	Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure	High voltage system insulation malfunction	Click here
U0131	Lost Communication with Electric Power Steering ECU	No communication with power steering ECU assembly	Click here
U0142	Lost Communication with Main Body ECU	No communication with main body ECU (multiplex network body ECU)	Click here
U0151	Lost Communication with Restraints Control Module	No communication with airbag sensor assembly	Click here
U0155	Lost Communication with Combination Meter	No communication with combination meter assembly	Click here
U0293	Lost Communication with HV ECU	No communication with hybrid vehicle control ECU	Click here