AIR CONDITIONING SYSTEM DIAGNOSTIC TROUBLE CODE CHART

Tech Tips

When the air conditioning system functions properly, DTC 00 is output.

Air Conditioning System
DTC Code	Detection Item	Trouble Area	Memory*5	See page
B1411/11*1	Room Temperature Sensor Circuit	1. Room temperature sensor 2. Harness or connector between room temperature sensor and A/C amplifier 3. A/C amplifier	Memorized (8.5 min. or more)	Click here
B1412/12*2	Ambient Temperature Sensor Circuit	1. Ambient temperature sensor 2. Harness or connector between ambient temperature sensor and A/C amplifier 3. A/C amplifier	Memorized (4 sec. or more)	Click here
B1413/13	Evaporator Temperature Sensor Circuit	1. Evaporator temperature sensor 2. Air conditioning harness 3. A/C amplifier	Memorized (4 sec. or more)	Click here
B1418/18*4	Exhaust Gas Sensor Circuit	1. Smog ventilation sensor (emission gas sensor) 2. Harness or connector between smog ventilation sensor (emission gas sensor) and A/C amplifier 3. A/C amplifier	-	Click here
B1423/23	Pressure Sensor Circuit	1. A/C pressure sensor 2. Harness or connector between A/C pressure sensor and A/C amplifier 3. A/C amplifier 4. Expansion valve (blocked, stuck) 5. Condenser (blocked, deterioration of cooling capacity due to dirt) 6. Cooler dryer (moisture in the refrigerant cycle cannot be absorbed) 7. Cooling fan system (condenser cannot be cooled down) 8. A/C system (leaks, blocked)	-	Click here
B1441/41	Air Mix Damper Control Servo Motor Circuit (Passenger Side)	1. Air mix control servo motor 2. Air conditioning harness 3. A/C amplifier	Memorized (30 sec. or more)	Click here
B1442/42	Air Inlet Damper Control Servo Motor Circuit	1. Air inlet control servo motor 2. Air conditioning harness 3. A/C amplifier	Memorized (30 sec. or more)	Click here
B1443/43	Air Outlet Damper Control Servo Motor Circuit	1. Air outlet control servo motor 2. Air conditioning harness 3. A/C amplifier	Memorized (30 sec. or more)	Click here
B1446/46	Air Mix Damper Control Servo Motor Circuit (Driver Side)	1. Air mix control servo motor 2. Air conditioning harness 3. A/C amplifier	Memorized (30 sec. or more)	Click here
B1461/61*4	Emission Gas NOx Sensor Circuit	1. Smog ventilation sensor (emission gas NOx sensor) 2. Harness or connector between smog ventilation sensor (emission gas NOx sensor) and A/C amplifier 3. A/C amplifier	-	Click here
B1462/62	Room Humidity Sensor Circuit	1. Room humidity sensor 2. Harness or connector between room humidity sensor and A/C amplifier 3. A/C amplifier	Memorized (8.5 min. or more)	Click here
B1471/71	A/C Inverter High Voltage Power Resource System Malfunction	1. Electric vehicle fuse 2. No. 4 Engine wire (harness or connector between compressor with motor assembly and inverter with converter assembly) 3. Compressor with motor assembly 4. Hybrid control system 5. CAN communication system	Memorized	Click here
B1472/72	A/C Inverter High Voltage Output System Malfunction	1. Compressor with motor assembly 2. CAN communication system	Memorized	Click here
B1473/73	A/C Inverter Start-up Signal System Malfunction	1. Harness or connector between power management control ECU and compressor with motor assembly 2. Compressor with motor assembly 3. Hybrid control system 4. CAN communication system	-	Click here
B1474/74	A/C Inverter Malfunction	1. Compressor with motor assembly 2. CAN communication system	Memorized	Click here
B1475/75	A/C Inverter Cooling / Heating System Malfunction	1. Cooling fan system 2. Refrigerant volume 3. Compressor with motor assembly 4. CAN communication system	Memorized	Click here
B1476/76	A/C Inverter Load System Malfunction	1. Cooling fan system 2. Refrigerant volume 3. Compressor with motor assembly 4. CAN communication system	Memorized	Click here
B1477/77	A/C Inverter Low Voltage Power Resource System Malfunction	1. Compressor with motor assembly 2. CAN communication system	Memorized	Click here
B1497/97	BUS IC Communication Malfunction	1. Air conditioning harness 2. A/C amplifier	Memorized (10 sec. or more)	Click here
B1498/98*3	Communication Malfunction (A/C Inverter Local)	1. Harness or connector between power management control ECU and compressor with motor assembly 2. Harness or connector between compressor with motor assembly and body ground 3. Electric vehicle fuse 4. Power management control ECU 5. Compressor with motor assembly 6. No. 4 Engine wire (harness or connector between compressor with motor assembly and inverter with converter assembly) 7. CAN communication system 8. Hybrid control system	Memorized	Click here
B14A2	Driver Side Solar Sensor Short Circuit	1. Solar sensor 2. Harness or connector between solar sensor and A/C amplifier 3. Harness or connector between solar sensor and main body ECU 4. Main body ECU 5. A/C amplifier	Memorized (4 sec. or more)	Click here
B14A3	Front Passenger Side Solar Sensor Short Circuit	1. Solar sensor 2. Harness or connector between solar sensor and A/C amplifier 3. Harness or connector between solar sensor and main body ECU 4. Main body ECU 5. A/C amplifier	Memorized (4 sec. or more)	Click here
U0100	Lost Communication with ECM	1. CAN communication system 2. ECM	-	Click here
U0101	Lost Communication with TCM	1. CAN communication system 2. TCM	-	Click here
U0131	Lost Communication with Electric Power Steering ECU	1. CAN communication system 2. Electric power steering ECU	-	Click here
U0142	Lost Communication with Main Body ECU	1. CAN communication system 2. Main body ECU	-	Click here
U0155	Lost Communication with Combination Meter	1. CAN communication system 2. Combination meter	-	Click here
U0293	Lost Communication with HV ECU	1. CAN communication system 2. Power management control ECU	-	Click here

*1: If the cabin temperature is approx. -18.6°C (-1.48°F) or lower, DTC B1411/11 may be output even though the system is normal.
*2: If the ambient temperature is approx. -52.9°C (-63.22°F) or lower, DTC B1412/12 may be output even though the system is normal.
*3: Depending on the timing of the power supply to the 12 V power supply circuit and high-voltage circuit when the power switch is turned on (READY), an abnormal information signal may be output, causing this DTC to be stored. If the output DTC is a code that was memorized in the past, check the fuses and wire harnesses. If there is no malfunction, clear the DTC.
*4: w/ Navigation System
*5: The A/C amplifier stores the DTC of the respective malfunction if it has occurred for the period of time indicated in the brackets.

Hybrid Control System
DTC Code	Detection Item	Trouble Area	Memory	See page
P0AA6-611	Hybrid Battery Voltage System Isolation Fault	1. Compressor oil 2. Refrigerant pipe line 3. Compressor with motor assembly 4. CAN communication system	-	Click here