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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Hybrid Battery System - Diagnostic Codes (2 Of 5)) >> HYBRID BATTERY SYSTEM (for PHEV Model) >> DTC P0CDF-73: Hybrid/EV Battery Pack Coolant Control Valve "A" Stuck On Actuator Stuck Closed [12/2023 - ] >> Procedure

DTC P0CDF-73: Hybrid/EV Battery Pack Coolant Control Valve "A" Stuck On Actuator Stuck Closed [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
      "P0CDF-73" 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
      B3A0A-71 A/C Heating Electric Expansion Valve Actuator Stuck
      P0EC9-71 A/C Low Pressure Magnetic Valve Actuator Stuck
      P0530-1C Refrigerant Pressure Sensor Circuit Voltage Out of Range
      P1501-7A Hybrid/EV Battery Cooling Refrigerant Gas Fluid Leak or Seal Failure
      P2D44-96 A/C Compressor Component Internal Failure
      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. CHECK VEHICLE CONDITION 

    Pre-procedure1

    1. Make sure that the front side of the radiator grille is not blocked with anything.

      Procedure1

    2. Ask the customer if the front side of the radiator grille was blocked with anything.

      HINT: 

      If the radiator grille is blocked, the inverter coolant temperature will increase and this DTC may be stored.

      Result

      Result Proceed to
      Not blocked. A
      Is/was blocked. B

      Post-procedure1

    3. None.

    Result: 

    B 

    IF EQUIPPED, EXPLAIN TO CUSTOMER THAT OPTIONAL COMPONENTS WILL BE REMOVED 

    Result: 

    A 

    See step  3

  3. INSPECT COOLING FAN 

    Pre-procedure1

    1. None.

      Procedure1

    2. Perform the "Control the Engine Cooling Fan Duty Ratio" Active Test.

      Powertrain > Engine > Active Test 

      Tester Display
      Control the Engine Cooling Fan Duty Ratio

      OK

      GTS Operation Fan Operation
      30 - 100% Cooling fan operates
      0% Cooling fan stops

      Result

      Result Proceed to
      Cooling fan operates A
      Cooling fan does not operate B
      Cooling fan does not stop

      Post-procedure1

    3. Turn the ignition switch off.

    Result: 

    B 

    GO TO COOLING FAN CIRCUIT. Refer to  Cooling Fan Circuit [12/2023 - ] 

    Result: 

    A 

    See step  4

  4. REFRIGERANT SHORTAGE CHECK USING GTS 

    Refer to PROCEDURE - Step 3

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    See step  10

    Result: 

    OK 

    See step  5

  5. 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 Inlet 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) and Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 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 Inlet 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) and Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 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  6

  6. 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
      "P0CDF-73" 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
      B3A0A-71 A/C Heating Electric Expansion Valve Actuator Stuck
      P0EC9-71 A/C Low Pressure Magnetic Valve Actuator Stuck
      P0530-1C Refrigerant Pressure Sensor Circuit Voltage Out of Range
      P1501-7A Hybrid/EV Battery Cooling Refrigerant Gas Fluid Leak or Seal Failure
      P2D44-96 A/C Compressor Component Internal Failure
      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  7

  7. 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)" and "Hybrid/EV Battery Refrigerant Temperature (Duct Inlet 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 Inlet 2)" is outside the standard value C

    Result: 

    B 

    See step  14

    Result: 

    C 

    See step  16

    Result: 

    A 

    See step  8

  8. CHECK BATTERY ECU ASSEMBLY (SNVB VOLTAGE) 

    See step  1

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  9

  9. INSPECT NO. 2 MAGNET VALVE ASSEMBLY 

    See step  2

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

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

    Result: 

    NG 

    REPLACE NO. 2 MAGNET VALVE ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

  10. INSPECT FOR REFRIGERANT LEAK (AIR CONDITIONING SYSTEM) 

    See step  6

    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  11

  11. INSPECT FOR REFRIGERANT LEAK (INLET SIDE OF HV SUPPLY BATTERY ASSEMBLY) 

    See step  7

    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 - ] 

  12. CHECK HARNESS AND CONNECTOR (NO. 2 MAGNET VALVE ASSEMBLY - BODY GROUND) 

    See step  3

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (NO. 2 MAGNET VALVE ASSEMBLY - BATTERY ECU ASSEMBLY) 

    See step  4

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  14. 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  15

  15. 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 

  16. 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  17

  17. 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 

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