Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026Z3V
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): B142200; A/C Inverter Load Malfunction; 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

DTC

B142200

A/C Inverter Load Malfunction

DESCRIPTION

The operation of the compressor with motor assembly is stopped and this DTC is stored if the rotation load is too large or too small while the compressor with motor assembly is operating.

HINT:

Possible causes are refrigerant leaks, overcharged refrigerant, insufficient cooling due to a condenser fan circuit malfunction, or compressor lock.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

B142200

A/C Inverter Load Malfunction

Diagnosis Condition:

  • There is a compressor operation request.

Malfunction:

  • The rotational load when the compressor is operating is too large or too small.

Detection Time:

  • -
  • Cooling fan system
  • Refrigerant volume
  • Compressor with motor assembly

Memorized

DTC Detection Condition Combination Table

 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

There is a compressor operation request.

Malfunction

The rotational load when the compressor is operating is too large.

-

The rotational load when the compressor is operating is too small.

-

Detection Time

-

-

Trip Count

1 trip

1 trip

HINT:

If the conditions of either of these patterns are detected, a DTC will be stored.

CAUTION / NOTICE / HINT

CAUTION:

  • Before inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

    Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

  • Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.

    Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): PRECAUTION

NOTICE:

  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
    • Before disconnecting battery:

      Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: BEFORE DISCONNECTING BATTERY

    • Automatic learning chart:

      Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART

  • The hybrid control system and air conditioning system output DTCs separately. Perform troubleshooting for the hybrid control system first if DTCs for both systems are output simultaneously.

    Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): HOW TO PROCEED WITH TROUBLESHOOTING

  • The air conditioning system uses the CAN communication system. Inspect the communication functions by following How to Proceed with Troubleshooting. Troubleshoot the air conditioning system after confirming that the communication systems are functioning properly.

    Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

PERFORM ACTIVE TEST USING GTS

(a) Perform the Active Test according to the display on the GTS.

Powertrain > Engine > Active Test

Tester Display

Measurement Item

Control Range

Restrict Condition

Control the Engine Cooling Fan

Control electric cooling fan motor

OFF/Low/High

Perform this test when vehicle is stopped.

Powertrain > Engine > Active Test

Tester Display

Control the Engine Cooling Fan

OK:

Electric cooling fan operates smoothly.

NG

GO TO COOLING FAN SYSTEM

OK

2.

CHECK REFRIGERANT PRESSURE

(a) Install a manifold gauge set.

for HFC-134a(R134a): Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFC-134a(R134a)): ON-VEHICLE INSPECTION

for HFO-1234yf(R1234yf): Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFO-1234yf(R1234yf)): ON-VEHICLE INSPECTION

(b) Prepare the vehicle according to the table below.

Measurement Condition:

Item

Condition

Doors

Fully open

A/C Switch

On

Recirculation/fresh Control Switch

Recirculation

Set Temperature

MAX COLD

Blower Speed

HI

Air Conditioning Air Inlet Temperature

25 to 35°C (77 to 95°F)

(c) Read the manifold gauge pressure.

Standard Pressure:

Low pressure side

150 to 250 kPa (1.5 to 2.5 kgf/cm2, 22 to 36 psi)

High pressure side

1370 to 1570 kPa (14 to 16 kgf/cm2, 199 to 228 psi)

OK

REPLACE COMPRESSOR WITH MOTOR ASSEMBLY 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: COMPRESSOR (for 2ZR-FXE): REMOVAL 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; HEATING / AIR CONDITIONING: COMPRESSOR (for 2ZR-FXE): REMOVAL

NG

CHARGE REFRIGERANT

for HFC-134a(R134a): Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFC-134a(R134a)): REPLACEMENT

for HFO-1234yf(R1234yf): Click here 2021 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2020 -        ]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFO-1234yf(R1234yf)): REPLACEMENT