DTC B1475: A/C Inverter Cooling / Heating System Malfunction [06/2020 - 08/2020]: Procedure

1. Using the Techstream, check if the CAN communication system is functioning normally.

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2019 - ]

   Result

   Result	Proceed to
   CAN communication system DTCs are not output	A
   CAN communication system DTCs are output	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2019 - ] 

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test.
5. Check the operation by referring to the table below.

   Powertrain > Engine > Active Test 

   Tester Display	Measurement Item	Control Range	Restrict Condition
   Control the Engine Cooling Fan Duty Ratio	Electric cooling fan motor operation	0 to 100 (%)	Perform this test when vehicle is stopped.

   Powertrain > Engine > Active Test 

   Tester Display
   Control the Engine Cooling Fan Duty Ratio

   OK

   Electric cooling fan operates smoothly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO COOLING FAN SYSTEM. Refer to  ON-VEHICLE INSPECTION [02/2019 - ] 

Result: 

OK 

See step  3

1. Install a manifold gauge set.
   1. for HFC-134a (R134a): Refer to ON-VEHICLE INSPECTION [11/2018 - 08/2020]
   2. for HFO-1234yf (R1234yf): Refer to ON-VEHICLE INSPECTION [02/2019 - ]
2. Turn the ignition switch to ON (READY).
3. Read the manifold gauge pressure when the following conditions are met.
   1. Prepare the vehicle according to the table below.
      MEASUREMENT CONDITION:
      
      

      Item	Condition
      Vehicle Condition	Ignition switch ON (READY)
      Doors	Fully closed (windows also fully closed)
      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)

   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)

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CHARGE REFRIGERANT 

1. for HFC-134a (R134a): Refer to REPLACEMENT [11/2018 - 08/2020]
2. for HFO-1234yf (R1234yf): Refer to REPLACEMENT [02/2019 - ]

Result: 

OK 

See step  4

1. Set the vehicle condition when the DTCs are output.
   1. Set the "Inspection Mode".

      Refer to INSPECTION MODE PROCEDURE [11/2018 - ]

   2. Prepare the vehicle according to the table below for 30 minutes or more.

      Item	Condition
      Blower Speed	HI
      A/C Switch	On
      Set Temperature	MAX COLD

2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [02/2019 - ]

   Body Electrical > Air Conditioner > Clear DTCs 

3. Turn the ignition switch to ON (READY).
4. Check for DTCs.

   Refer to DTC CHECK / CLEAR [02/2019 - ]

   Body Electrical > Air Conditioner > Trouble Codes 

   OK

   DTC B1475 is not output

   Result

   Proceed to
   OK
   NG

   NOTE:

   If the engine keeps idling when the ambient temperature is high, the compressor with motor assembly may automatically stop to protect the inverter circuit, and DTC B1475 may be stored.

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

NG 

REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to  REMOVAL [06/2020 - 08/2020]