Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001SDN9
Model Year Start: 2021 Model: Avalon Prod Date Range: [08/2020 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): DIAGNOSTIC TROUBLE CODE CHART; 2021 - 2022 MY Avalon [08/2020 -        ]

DIAGNOSTIC TROUBLE CODE CHART

Air Conditioning System (for Gasoline Model)

DTC No.

Detection Item

DTC Detection Condition

Link

B1411

Room Temperature Sensor Circuit

Open or short in room temperature sensor circuit

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1411; Room Temperature Sensor Circuit

B1412

Ambient Temperature Sensor Circuit

Open or short in ambient temperature sensor circuit

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1412; Ambient Temperature Sensor Circuit

B1413

Evaporator Temperature Circuit or Evaporator Fin Thermistor

Open or short in evaporator temperature sensor circuit

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1413; Evaporator Temperature Circuit or Evaporator Fin Thermistor

B1422

Compressor Lock

Open or short in A/C lock sensor circuit

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1422; Compressor Lock

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 (176 kPaG (1.8 kgf/cm2, 26 psi) or less) or extremely high (3025 kPaG (30.8 kgf/cm2, 439 psi) or more)

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1423; Open in Pressure Sensor Circuit / Abnormal Refrigerant Pressure

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 (front passenger side air mix)

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1441,B1443,B1446; Air Mix Damper Control Servo Motor Circuit (Passenger Side)

B1442

Air Inlet Damper Control Servo Motor

Air inlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 blower damper servo sub-assembly

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1442; Air Inlet Damper Control Servo Motor

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 (mode)

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1441,B1443,B1446; Air Mix Damper Control Servo Motor Circuit (Passenger Side)

B1446

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. 1 air conditioning radiator damper servo sub-assembly (driver side air mix)

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1441,B1443,B1446; Air Mix Damper Control Servo Motor Circuit (Passenger Side)

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 No. 2 air conditioning radiator damper servo sub-assembly

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1449; Air Outlet Damper Control Servo Motor Circuit (Rear)

B1451

Compressor Solenoid Circuit

Open or short in compressor solenoid circuit

2021 - 2022 MY Avalon [08/2020 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1451; Compressor Solenoid Circuit

B1497

Communication Malfunction (Bus Ic)

Error or open in communication line

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B1497; Communication Malfunction (Bus Ic)

B14B2

Lost Communication with Front Panel LIN

Lost communication with air conditioning control assembly

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B14B2; Lost Communication with Front Panel LIN

B14B8

Refrigerant Shortage

The following condition is detected in the normal operation refrigerant shortage check:

Amount of refrigerant is insufficient

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B14B8; Refrigerant Shortage

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

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): B14BD; Refrigerant Overabundance Filling Malfunction

U0100

Lost Communication With ECM/PCM "A"

No communication with ECM

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): U0100-U0142,U0151,U0155,U0163; Lost Communication With ECM/PCM "A"

U0131

Lost Communication With Power Steering Control Module

No communication with power steering ECU (rack and pinion power steering gear assembly)

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): U0100-U0142,U0151,U0155,U0163; Lost Communication With ECM/PCM "A"

U0142

Lost Communication With Body Control Module "B"

No communication with main body ECU (multiplex network body ECU)

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): U0100-U0142,U0151,U0155,U0163; Lost Communication With ECM/PCM "A"

U0151

Lost Communication With Restraints Control Module

No communication with airbag ECU assembly

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): U0100-U0142,U0151,U0155,U0163; Lost Communication With ECM/PCM "A"

U0155

Lost Communication With Instrument Panel Cluster (IPC) Control Module

No communication with combination meter assembly

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): U0100-U0142,U0151,U0155,U0163; Lost Communication With ECM/PCM "A"

U0163

Lost Communication With Navigation Control Module

No communication with air conditioning control panel (radio and display receiver assembly)

2019 - 2022 MY Avalon [04/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): U0100-U0142,U0151,U0155,U0163; Lost Communication With ECM/PCM "A"