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DTC P0C32-00: Hybrid/EV Battery Cooling System "A" Performance [12/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL, AIR CONDITIONER) 

    Pre-procedure1

    1. None.

      Procedure1

    2. Check for DTCs.

      Powertrain > HV Battery > Trouble Codes 

      Powertrain > Hybrid Control > Trouble Codes 

      Body Electrical > Air Conditioner > Trouble Codes 

      Result

      Result Proceed to
      "P0C32-00" only is output, or DTCs except the ones in the table below are also output. A
      DTCs of hybrid battery system in the table below are output. B
      DTCs of hybrid control system in the table below are output. C
      DTCs of air conditioning system in the table below are output. D
      Malfunction Content System Relevant DTC
      Air conditioner malfunction Air conditioning system B1385-71 A/C Cooling Electric Expansion Valve Actuator Stuck
      P0EC9-71 A/C Low Pressure Magnetic Valve Actuator Stuck
      Microcomputer malfunction Hybrid battery system P060A-47 Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
      P060B-49 Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
      P0606-87 Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
      Hybrid control system P0A1F-94 Hybrid/EV Battery Energy Control Module Unexpected Operation

      Post-procedure1

    3. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer To  HYBRID CONTROL SYSTEM - DIAGNOSTICS - INTRODUCTION 

    Result: 

    C 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

    Result: 

    D 

    GO TO DTC CHART (AIR CONDITIONING SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

    Result: 

    A 

    See step  2

  2. REFRIGERANT SHORTAGE CHECK USING GTS 

    Refer to PROCEDURE - Step 3

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    See step  6

    Result: 

    OK 

    See step  3

  3. PERFORM ACTIVE TEST USING GTS (HYBRID/EV BATTERY REFRIGERANT COOLING CONTROL) 

    Pre-procedure1

    1. Perform the "Hybrid/EV Battery Refrigerant Cooling Control" Active Test for 20 minutes.

      Powertrain > HV Battery > Active Test 

      Active Test Display
      Hybrid/EV Battery Refrigerant Cooling Control
      Data List Display
      Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 1)
      Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 1)
      Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 2)
      Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 2)

      HINT: 

      • In order to perform "Hybrid/EV Battery Refrigerant Cooling Control", the HV battery minimum temperature must be 20°C (68°F) and the refrigerant temperature must be 20°C (68°F) or higher.

        If the above conditions are not established, perform the "Hybrid/EV Battery Heater Relay" Active Test in an environment with an ambient temperature of 5°C (41°F) or higher and increase the HV battery temperature.

        The temperature will drop after the heater is stopped, so increase the values of "Hybrid/EV Battery Temperature 1 to 20, Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 1), Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 2)" in the Data List to 21°C (70°F) or higher.

        (At an ambient temperature of 5°C (41°F), "Hybrid/EV Battery Heater Relay" will need to be performed for approximately 10 hours.)

      • Perform this step with the A/C blower switch off.
    2. Read and record the values of "Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 1), Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 1), Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 2) and Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 2)" in the Data List after 5 minutes have elapsed after the "Hybrid/EV Battery Refrigerant Cooling Control" Active Test starts.
    3. Turn the ignition switch off and wait for 1 minute or more.
    4. Perform the "Hybrid/EV Battery Refrigerant Cooling Control" Active Test for 20 minutes.

      Powertrain > HV Battery > Active Test 

      Active Test Display
      Hybrid/EV Battery Refrigerant Cooling Control
      Data List Display
      Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 1)
      Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 1)
      Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 2)
      Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 2)

      HINT: 

      • In order to perform "Hybrid/EV Battery Refrigerant Cooling Control", the HV battery minimum temperature must be 20°C (68°F) and the refrigerant temperature must be 20°C (68°F) or higher.

        If the above conditions are not established, perform the "Hybrid/EV Battery Heater Relay" Active Test in an environment with an ambient temperature of 5°C (41°F) or higher and increase the HV battery temperature.

        The temperature will drop after the heater is stopped, so increase the values of "Hybrid/EV Battery Temperature 1 to 20, Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 1), Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 2)" in the Data List to 21°C (70°F) or higher.

        (At an ambient temperature of 5°C (41°F), "Hybrid/EV Battery Heater Relay" will need to be performed for approximately 10 hours.)

      • Perform this step with the A/C blower switch off.

      Procedure1

    5. Read and record the values of "Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 1), Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 1), Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 2) and Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 2)" in the Data List after 5 minutes have elapsed after the "Hybrid/EV Battery Refrigerant Cooling Control" Active Test starts.

      Result

      Proceed to
      NEXT

      Post-procedure1

    6. Turn the ignition switch off.

    Result: 

    NEXT 

    See step  4

  4. CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL, AIR CONDITIONER) 

    Pre-procedure1

    1. None.

      Procedure1

    2. Check for DTCs.

      Powertrain > HV Battery > Trouble Codes 

      Powertrain > Hybrid Control > Trouble Codes 

      Body Electrical > Air Conditioner > Trouble Codes 

      Result

      Result Proceed to
      "P0C32-00" only is output, or DTCs except the ones in the table below are also output. A
      DTCs of hybrid battery system in the table below are output. B
      DTCs of hybrid control system in the table below are output. C
      DTCs of air conditioning system in the table below are output. D
      Malfunction Content System Relevant DTC
      Air conditioner malfunction Air conditioning system B1385-71 A/C Cooling Electric Expansion Valve Actuator Stuck
      P0EC9-71 A/C Low Pressure Magnetic Valve Actuator Stuck
      Microcomputer malfunction Hybrid battery system P060A-47 Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
      P060B-49 Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
      P0606-87 Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
      Hybrid control system P0A1F-94 Hybrid/EV Battery Energy Control Module Unexpected Operation

      Post-procedure1

    3. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer To  HYBRID CONTROL SYSTEM - DIAGNOSTICS - INTRODUCTION 

    Result: 

    C 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

    Result: 

    D 

    GO TO DTC CHART (AIR CONDITIONING SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

    Result: 

    A 

    See step  5

  5. READ VALUE USING GTS (HYBRID/EV BATTERY REFRIGERANT TEMPERATURE) 
    1. Check each refrigerant temperature recorded while performing the "Hybrid/EV Battery Refrigerant Cooling Control" Active Test.

      OK

      -20 to 20°C (-4 to 68°F)

      Result

      Result Proceed to
      "Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 1)", "Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 1)", "Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 2)" and "Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 2)" are within the standard value A
      "Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 1)" is outside the standard value B
      "Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 1)" is outside the standard value C
      "Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 2)" is outside the standard value D
      "Hybrid/EV Battery Refrigerant Temperature (Duct Outlet 2)" is outside the standard value E

    Result: 

    A 

    REPLACE NO. 1 TRACTION BATTERY HEATER, NO. 2 TRACTION BATTERY HEATER, NO. 1 TRACTION BATTERY COOLER CONDUCTOR AND NO. 1 TRACTION BATTERY COOLER SHEET. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    B 

    See step  8

    Result: 

    C 

    See step  10

    Result: 

    D 

    See step  12

    Result: 

    E 

    See step  14

  6. INSPECT FOR REFRIGERANT LEAK (AIR CONDITIONING SYSTEM) 
    1. After recharging the air conditioning system with refrigerant, inspect for refrigerant leaks using a halogen leak detector.

      HINT: 

      Refer to REPLACEMENT [12/2023 - ]

      OK

      No refrigerant leak

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO PROBLEM SYMPTOMS TABLE (AIR CONDITIONING SYSTEM). Refer to  PROBLEM SYMPTOMS TABLE [12/2023 - ] 

    Result: 

    OK 

    See step  7

  7. INSPECT FOR REFRIGERANT LEAK (INLET SIDE OF HV SUPPLY BATTERY ASSEMBLY) 
    1. After recharging the air conditioning system with refrigerant, inspect for refrigerant leaks using a halogen leak detector.
      GTY1230746Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      No refrigerant leak

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK AND REPLACE REFRIGERANT LEAK (HV SUPPLY BATTERY ASSEMBLY). Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    GO TO PROBLEM SYMPTOMS TABLE (AIR CONDITIONING SYSTEM). Refer to  PROBLEM SYMPTOMS TABLE [12/2023 - ] 

  8. CHECK NO. 1 AIR CONDITIONING THERMISTOR ASSEMBLY (DUCT INLET 1) 

    See step  4

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE BATTERY ECU ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (NO. 1 AIR CONDITIONING THERMISTOR ASSEMBLY (DUCT INLET 1) - BATTERY ECU ASSEMBLY) 

    See step  5

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE NO. 1 AIR CONDITIONING THERMISTOR ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  10. CHECK NO. 2 AIR CONDITIONING THERMISTOR ASSEMBLY (DUCT OUTLET 1) 

    See step  6

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE BATTERY ECU ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING THERMISTOR ASSEMBLY (DUCT OUTLET 1) - BATTERY ECU ASSEMBLY) 

    See step  7

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE NO. 2 AIR CONDITIONING THERMISTOR ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  12. CHECK NO. 1 AIR CONDITIONING THERMISTOR ASSEMBLY (DUCT INLET 2) 

    See step  8

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE BATTERY ECU ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (NO. 1 AIR CONDITIONING THERMISTOR ASSEMBLY (DUCT INLET 2) - BATTERY ECU ASSEMBLY) 

    See step  9

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE NO. 1 AIR CONDITIONING THERMISTOR ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  14. CHECK NO. 2 AIR CONDITIONING THERMISTOR ASSEMBLY (DUCT OUTLET 2) 

    See step  10

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE BATTERY ECU ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    See step  15

  15. CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING THERMISTOR ASSEMBLY (DUCT OUTLET 2) - BATTERY ECU ASSEMBLY) 

    See step  11

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE NO. 2 AIR CONDITIONING THERMISTOR ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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