Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001NLY0
Model Year Start: 2021 Model: Corolla Prod Date Range: [04/2020 - 09/2022]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): DIAGNOSTIC TROUBLE CODE CHART; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]

DIAGNOSTIC TROUBLE CODE CHART

Air Conditioning System

DTC No.

Detection Item

DTC Detection Condition

Link

B1411

Room Temperature Sensor Circuit

Open or short in room temperature sensor circuit

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1411; Room Temperature Sensor Circuit

B1412

Ambient Temperature Sensor Circuit

Open or short in ambient temperature sensor circuit

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1412; Ambient Temperature Sensor Circuit

B1413

Evaporator Temperature Circuit or Evaporator Fin Thermistor

Open or short in evaporator temperature sensor circuit

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1413; Evaporator Temperature Circuit or Evaporator Fin Thermistor

B1423

Open in Pressure Sensor Circuit / Abnormal Refrigerant Pressure
  • Open or short in air conditioner pressure sensor circuit

for HFC-134a (R134a):

  • 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)

for HFO-1234yf (R1234yf):

  • 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)

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV 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

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1441; 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

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV 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. 3 air conditioning radiator damper servo sub-assembly

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1443; Air Outlet Damper Control Servo Motor Circuit

B1448

FACE Servo Motor Circuit(Passenger Side)

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

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1448; FACE 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

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1449; Air Outlet Damper Control Servo Motor Circuit (Rear)

B1471

A/C Inverter High Voltage Power Resource System
  • Open or short in A/C inverter high voltage power resource system
  • Boost inverter malfunctioning

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1471; A/C Inverter High Voltage Power Resource System

B1472

A/C Inverter High Voltage Output System

Open or short in A/C inverter high voltage output circuit

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1472; A/C Inverter High Voltage Output System

B1473

A/C Inverter Start-up Signal System

Open or short in A/C inverter start-up signal circuit

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1473; A/C Inverter Start-up Signal System

B1474

A/C Inverter

A/C inverter malfunction

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1474; A/C Inverter

B1475

A/C Inverter Cooling / Heating System

A/C inverter temperature outside specified range (temperature too high) or open or short to ground in temperature sensor circuit

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1475; A/C Inverter Cooling / Heating System

B1476

A/C Inverter Load System

Motor rotation load while compressor is operating is too large or too small

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1476; A/C Inverter Load System

B1477

A/C Inverter Low Voltage Power Resource System

Open or short to ground in inverter control power voltage circuit

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1477; A/C Inverter Low Voltage Power Resource System

B1497

Communication Malfunction (Bus Ic)

Error or open in communication line

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1497; Communication Malfunction (Bus Ic)

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

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B1498; Communication Malfunction (A/C Inverter Local)

B14B2

Lost Communication with Front Panel LIN

Lost communication with air conditioning control assembly

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV 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

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B14B8; Refrigerant Shortage

P1C7C49

Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure

High voltage system insulation malfunction

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): P1C7C49; Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure

U0100

Lost Communication With ECM/PCM "A"

No communication with ECM

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): U0100-U0142,U0151,U0155,U0293; Lost Communication With ECM/PCM "A"

U0131

Lost Communication With Power Steering Control Module

No communication with power steering ECU with motor assembly

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): U0100-U0142,U0151,U0155,U0293; Lost Communication With ECM/PCM "A"

U0142

Lost Communication With Body Control Module "B"

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

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): U0100-U0142,U0151,U0155,U0293; Lost Communication With ECM/PCM "A"

U0151

Lost Communication With Restraints Control Module

No communication with airbag sensor assembly

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): U0100-U0142,U0151,U0155,U0293; Lost Communication With ECM/PCM "A"

U0155

Lost Communication With Instrument Panel Cluster (IPC) Control Module

No communication with combination meter assembly

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): U0100-U0142,U0151,U0155,U0293; Lost Communication With ECM/PCM "A"

U0293

Lost Communication with HV ECU

No communication with hybrid vehicle control ECU

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): U0100-U0142,U0151,U0155,U0293; Lost Communication With ECM/PCM "A"