Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001EZN5
Model Year Start: 2019 Model: Camry HV Prod Date Range: [09/2018 - 10/2020]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1476; A/C Inverter Load System Malfunction; 2019 - 2020 MY Camry HV [09/2018 - 10/2020]

DTC

B1476

A/C Inverter Load System 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.

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

B1476

A/C Inverter Load System Malfunction

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

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

Memorized

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

NOTICE:

  • After turning the power 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.

    Click here 2018 - 2019 MY Camry HV [07/2017 - 09/2019]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION 2020 - 2024 MY Camry HV [09/2019 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

  • 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.
  • 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 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Powertrain > Engine > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Control the Engine Cooling Fan Duty Ratio

Control the cooling fan

0 to 100%

Perform this test when vehicle is stopped.

Powertrain > Engine > Active Test

Tester Display

Control the Engine Cooling Fan Duty Ratio

OK:

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 2019 - 2020 MY Camry HV [09/2018 - 10/2020]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFC-134a(R134a)): ON-VEHICLE INSPECTION

for HFO-1234yf (R1234yf): Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HEATING / AIR CONDITIONING: REFRIGERANT(for HFO-1234yf(R1234yf)): ON-VEHICLE INSPECTION

(b) Turn the power switch on (READY).

(c) Read the manifold gauge pressure when the following conditions are met.

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

Item

Condition

Vehicle doors

Fully open

Temperature setting

MAX COLD

Blower speed

HI

A/C switch

On

Recirculation/fresh switch

RECIRCULATION

Interior temperature

25 to 35°C (77 to 95°F)

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

NG

CHARGE REFRIGERANT

for HFC-134a (R134a): Click here 2019 - 2020 MY Camry HV [09/2018 - 10/2020]; HEATING / AIR CONDITIONING: REFRIGERANT (for HFC-134a(R134a)): REPLACEMENT

for HFO-1234yf (R1234yf): Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; HEATING / AIR CONDITIONING: REFRIGERANT(for HFO-1234yf(R1234yf)): REPLACEMENT