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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating / Air Conditioning System (Except HV, W/ Manual A/C) - Diagnostics - Introduction >> AIR CONDITIONING SYSTEM (for Gasoline Model with Manual Air Conditioning System) >> Diagnostic Trouble Code Chart [12/2019 - 10/2022] >> Diagnostic Trouble Code Chart [12/2019 - 10/2022]

Diagnostic Trouble Code Chart [12/2019 - 10/2022]

AIR CONDITIONING SYSTEM

DTC No. Detection Item DTC Detection Condition Link
B1412 Ambient Temperature Sensor Circuit Open or short in ambient temperature sensor circuit Refer to DTC B1412: Ambient Temperature Sensor Circuit [12/2019 - 10/2022]
B1413 Evaporator Temperature Circuit or Evaporator Fin Thermistor Open or short in evaporator temperature sensor circuit Refer to DTC B1413: Evaporator Temperature Circuit or Evaporator Fin Thermistor [12/2019 - 10/2022]
B1417 Evaporator Temperature Circuit Open or short in rear evaporator temperature sensor circuit Refer to DTC B1417: Evaporator Temperature Circuit [12/2019 - 10/2022]
B1422 Compressor Lock Open or short in A/C lock sensor circuit Refer to DTC B1422: Compressor Lock [12/2019 - 10/2022]
B1423 Open in Pressure Sensor Circuit / Abnormal Refrigerant Pressure
  • Open or short in air conditioner pressure sensor circuit
  • Refrigerant pressure on high pressure side is extremely low (196 kPaG (2.0 kgf/cm2 , 28 psi) or less) or extremely high (2812 kPaG (28.7 kgf/cm2 , 408 psi) or more)
 Refer to DTC B1423: Open in Pressure Sensor Circuit / Abnormal Refrigerant Pressure [12/2019 - 10/2022]
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. 1 air conditioning radiator damper servo sub-assembly Refer to DTC B1441: Air Mix Damper Control Servo Motor Circuit (Passenger Side) [12/2019 - 10/2022]
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 Refer to DTC B1442: Air Inlet Damper Control Servo Motor Circuit [12/2019 - 10/2022]
B1443 Air Outlet Damper Control Servo Motor Circuit 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 Refer to DTC B1443: Air Outlet Damper Control Servo Motor Circuit [12/2019 - 10/2022]
B1447 Air Mix Damper Control Servo Motor Circuit (Rear) Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates rear air mix damper servo sub-assembly Refer to DTC B1447: Air Mix Damper Control Servo Motor Circuit (Rear) [12/2019 - 10/2022]
B1449 Air Outlet Damper Control Servo Motor Circuit (Rear) Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates rear mode damper servo sub-assembly Refer to DTC B1449: Air Outlet Damper Control Servo Motor Circuit (Rear) [12/2019 - 10/2022]
B1451 Compressor Solenoid Circuit Open or short in compressor solenoid circuit Refer to DTC B1451: Compressor Solenoid Circuit [12/2019 - 10/2022]
B1497 Communication Malfunction (Bus Ic) Error or open in communication line between air conditioning amplifier assembly and No. 1 air conditioning radiator damper servo sub-assembly Refer to DTC B1497: Communication Malfunction (Bus Ic) [12/2019 - 10/2022]
B149A Communication Malfunction (Rear Bus Ic) Error or open in communication line between air conditioning amplifier assembly and any of the following servo motors.
  • Rear mode damper servo sub-assembly
  • Rear air mix damper servo sub-assembly
 Refer to DTC B149A: Communication Malfunction (Rear Bus Ic) [12/2019 - 10/2022]
B14B2 Lost Communication with Front Panel LIN Lost communication with air conditioning control assembly Refer to DTC B14B2: Lost Communication with Front Panel LIN [12/2019 - 10/2022]
B14B3 Lost Communication with Rear Panel LIN Lost communication with No. 2 air conditioning control assembly Refer to DTC B14B3: Lost Communication with Rear Panel LIN [12/2019 - 10/2022]
B14B8 Refrigerant Shortage The following condition is detected in the normal operation refrigerant shortage check:
Amount of refrigerant is insufficient		 Refer to DTC B14B8: Refrigerant Shortage [12/2019 - 10/2022]
B14BD Refrigerant Overabundance Filling Malfunction All of the following conditions are met 2 times or more in the same trip:
  • The vehicle speed is 20 km/h or more
  • The amount of compressor oil is within the insufficient compressor oil range for 60 seconds or more
 Refer to DTC B14BD: Refrigerant Overabundance Filling Malfunction [12/2019 - 10/2022]
U0100 Lost Communication with ECM / PCM "A" No communication with ECM Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0131: Lost Communication with Power Steering Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module [12/2019 - 10/2022]
U0131 Lost Communication with Power Steering Control Module No communication with power steering ECU (rack and pinion power steering gear assembly) Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0131: Lost Communication with Power Steering Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module [12/2019 - 10/2022]
U0142 Lost Communication with Body Control Module "B" No communication with main body ECU (multiplex network body ECU) Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0131: Lost Communication with Power Steering Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module [12/2019 - 10/2022]
U0151 Lost Communication with Restraints Control Module No communication with airbag sensor assembly Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0131: Lost Communication with Power Steering Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module [12/2019 - 10/2022]
U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module No communication with combination meter assembly Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0131: Lost Communication with Power Steering Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module [12/2019 - 10/2022]
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