Diagnostic Trouble Code Chart

HINT:

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code.

Air conditioning amplifier

AIR CONDITIONING AMPLIFIER

DTC Code	Detection Item	Trouble Area	Memory	Diagnostic Note
B1411/11	Room Temperature Sensor Circuit	Room temperature sensor Harness and connector between room temperature sensor and air conditioning amplifier Air conditioning amplifier	Memorized (8.5 min. or more)	If the front side room temperature is approx. -18.6°C (1.48°F) or lower, DTC B1411/11 may be output even though the system is normal.
B1412/12	Ambient Temperature Sensor Circuit	Ambient temperature sensor Harness and connector between ambient temperature sensor and front light ECU (front controller) Front light ECU (front controller) CAN communication line Air conditioning amplifier	Memorized (8.5 min. or more)	If ambient temperature is approx. -52.9°C (-63.22°F) or lower, a malfunction code may be output even though the system is normal
B1413/13	Evaporator Temperature Sensor Circuit	No. 1 cooler thermistor (evaporator temperature sensor) Air conditioning harness (evaporator temperature sensor) Air conditioning amplifier	Memorized (8.5 min. or more)	-
B1418/18	Exhaust Gas Sensor Circuit	Exhaust gas sensor (smog ventilation sensor) Harness and connector between exhaust gas sensor (smog ventilation sensor) and front light ECU (front controller) Front light ECU (front controller) CAN communication line Air conditioning amplifier	-	-
B1419/19	Rear Room Temperature Sensor Circuit	Rear room temperature sensor LH Harness and connector between rear room temperature sensor LH and rear door ECU LH Rear door ECU LH Air conditioning amplifier CAN communication line	Memorized (8.5 min. or more)	If the rear driver side room temperature is approx. -18.6°C (1.48°F) or lower, DTC B1419/19 may be output even though the system is normal.
B1421/21	Solar Sensor Circuit (Passenger Side)	Automatic light control sensor (solar sensor) Harness and connector between solar sensor and air conditioning amplifier Harness and connector between solar sensor and main body ECU Main body ECU Air conditioning amplifier	Memorized (8.5 min. or more)	If the check is performed in a dark place, DTC B1424/24 (solar sensor circuit (driver side)) or B1428/28 (rear solar sensor circuit) may be output.
B1423/23	Pressure Sensor Circuit	Pressure sensor Harness and connector between pressure sensor and front light ECU (front controller) Front light ECU (front controller) Refrigerant pipe line CAN communication line Air conditioning amplifier	-	-
B1424/24	Solar Sensor Circuit (Driver Side)	Automatic light control sensor (solar sensor) Harness and connector between solar sensor and air conditioning amplifier Harness and connector between solar sensor and main body ECU Main body ECU Air conditioning amplifier	Memorized (8.5 min. or more)	If the check is performed in a dark place, DTC B1421/21 (solar sensor circuit (passenger side)) or B1428/28 (rear solar sensor circuit) may be output.
B1441/41	Air Mix Damper Control Servo Motor Circuit (Passenger Side)	Air mix servo motor (for passenger side HOT) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1442/42	Air Inlet Damper Control Servo Motor Circuit	Air inlet servo motor Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1443/43	Air Outlet Damper Control Servo Motor Circuit	Air outlet servo motor (for driver side FACE) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1446/46	Air Mix Damper Control Servo Motor Circuit (Driver Side)	Air mix servo motor (for driver side HOT) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1449/49	Rear Air Outlet Damper Control Servo Motor Circuit	Rear air outlet servo motor (for LH side) Rear air conditioning harness Harness and connector between rear air conditioning harness and air conditioning amplifier Air conditioning amplifier	Memorized (30 sec.)	-
B1451/51	Compressor Solenoid Circuit	Compressor and pulley Harness and connector air conditioning amplifier and compressor and pulley Air conditioning amplifier	-	-
B1461/61	Emission Gas NOx Sensor Circuit	Exhaust gas sensor (smog ventilation sensor) Harness and connector between exhaust gas sensor (smog ventilation sensor) and front light ECU (front controller) Front light ECU (front controller) CAN communication line Air conditioning amplifier	-	-
B1497/97	BUS IC Communication Malfunction	Air conditioning harness Air conditioning amplifier	-	-
B1499/99	Multiplex Communication Circuit	Air conditioning amplifier ECM Combination meter CAN communication line	-	-
B1415/15	Driver Side Duct Sensor	Air duct sensor (for driver side) Harness and connector between duct sensor and air conditioning amplifier Air conditioning amplifier	-	-
B1416/16	Passenger Side Duct Sensor	Air duct sensor (for passenger side) Harness and connector between duct sensor and air conditioning amplifier Air conditioning amplifier	-	-
B1428/28	Rear Solar Sensor Circuit	Rear solar sensor Harness and connector between rear solar sensor and luggage room junction block (rear junction block ECU) Luggage room junction block (rear junction block ECU) Air conditioning amplifier CAN communication line	Memorized (8.5 min. or more)	If the check is performed in a dark place, DTC B1421/21 (solar sensor circuit (passenger side)) or DTC B1424/24 (solar sensor circuit (driver side)) may be output.
B1444/44	Driver Side Cool Air Bypass Damper Control	Cool air bypass damper servo motor (for driver side) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1445/45	Passenger Side Cool Air Bypass Damper Control	Cool air bypass damper servo motor (for passenger side) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1448/48	Passenger Side FACE Servo Motor Circuit	Air outlet servo motor (for passenger side FACE) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1453/53	Driver Side Air Outlet Damper COOL Control Servo Motor Circuit	Air mix servo motor (for driver side COOL) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1454/54	Passenger Side Air Outlet Damper COOL Control Servo Motor Circuit	Air mix servo motor (for passenger side COOL) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1455/55	Driver Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit	Air outlet servo motor (for driver side FOOT/DEF) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1456/56	Passenger Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit	Air outlet servo motor (for passenger side FOOT/DEF) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1457/57	Driver Side Air Outlet Damper Control Servo Motor Circuit	Air mix servo motor (for driver side front A/C rear air flow) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1458/58	Passenger Side Air Outlet Damper Control Servo Motor Circuit	Air mix servo motor (for passenger side front A/C rear air flow) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1459/59	Max Hot Bypass Damper HOT Control Circuit	Max hot bypass damper servo motor (for HOT) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1468/68	Rear Passenger Side Room Temperature Sensor Circuit	Rear room temperature sensor RH Harness and connector between rear room temperature sensor RH and rear door ECU RH Rear door ECU RH Air conditioning amplifier CAN communication line	Memorized (8.5 min. or more)	If the rear passenger side room temperature is approx. -18.6°C (1.48°F) or lower, DTC B1468/68 may be output even though the system is normal.
B1469/69	Infrared Rays Sensor Circuit	Fuse Infrared ray sensor Harness and connector of infrared ray sensor	-	-
B1486/86	Driver Side Air Outlet Damper Control Servo Motor Circuit	Air outlet servo motor (for driver side front A/C rear air flow) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1487/87	Passenger Side Air Outlet Damper Control Servo Motor Circuit	Air outlet servo motor (for passenger side front A/C rear air flow) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1489/89	Rear Air Outlet Damper Control Servo Motor RH Circuit	Rear air outlet servo motor (for RH side) Rear air conditioning harness Harness and connector between rear air conditioning harness and air conditioning amplifier Air conditioning amplifier	Memorized (30 sec.)	-
B1492/92	Infrared Rays Sensor Communication Malfunction	Infrared ray sensor Harness and connector between infrared ray sensor and air conditioning amplifier LIN communication line	-	-
B1493/93	Max Hot Bypass Damper COOL Control Circuit	Max hot bypass damper servo motor (for COOL) Air conditioning harness Air conditioning amplifier	Memorized (30 sec.)	-
B1494/94	Rear Emission Servo Motor Circuit	Rear exhaust mode damper servo motor (for emission) Rear air conditioning harness Harness and connector between rear air conditioning harness and air conditioning amplifier Air conditioning amplifier	Memorized (30 sec.)	-
B1495/95	Rear Diffuse Servo Motor Circuit	Rear exhaust mode damper servo motor (for diffusion) Rear air conditioning harness Harness and connector between rear air conditioning harness and air conditioning amplifier Air conditioning amplifier	Memorized (30 sec.)	-
HINT: *: The air conditioning amplifier memorizes the DTC of the respective malfunction that has occurred for the period of the time indicated in the brackets.