FC BOOST CONTROL SYSTEM, Diagnostic DTC:P1D4F-450

DTC Code DTC Name
P1D4F-450 Total Reactor Current/FC Current Correlation

DESCRIPTION

The FC boost control ECU monitors the detection circuit inside the FC converter assembly and detects circuit malfunctions.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P1D4F-450 Total Reactor Current/FC Current Correlation

A malfunction in the adder circuit is detected because the difference between the total current of the reactors for all phases and the FC current is large.

(1 trip detection logic)

 FC converter assembly Master Warning Light: Comes on
Related Data List
DTC No. Data List
P1D4F-450 FC Current

CAUTION / NOTICE / HINT

CAUTION:


  • B006JFB
    B006JM4

    Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grips from both FC stack assembly and EV battery.


    • Inspecting the high-voltage system

    • Disconnecting the low voltage connector of the inverter with converter assembly

    • Disconnecting the low voltage connector of the EV battery

    • Disconnecting the low voltage connector of the FC stack assembly

    • Disconnecting the low voltage connector of the FC converter assembly

      Tech Tips

      No removal order is specified for the service plug grips of the FC stack assembly and EV battery.

  • B006JBZ

    After removing the service plug grip from the EV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After removing the service grip from the FC stack assembly, store it in a safe location and use the "HIGH-VOLTAGE, DO NOT TOUCH" sign to notify other technicians that you are working on the high-voltage system.

  • B000ZMTC04
    *a Without waiting for 10 minutes

    After removal of the service plug grips of both FC stack assembly and EV battery, wait for at least 10 minutes before touching the high-voltage connectors and terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    Tech Tips

    At least 10 minutes are necessary to discharge the high-voltage capacitors inside the inverter with converter assembly and FC stack assembly.

Note


  • When reinstalling the service plug grip to the FC stack assembly or the EV battery, slide the lever of the service plug until the letters "UNLOCK" are completely hidden, and insert it firmly.

    Click here

  • When the vehicle is parked with the power switch off, if the FC control ECU judges that the FC stack temperature will go below 0°C (32°F), it activates the FC air compressor, hydrogen pump and FC cooling water pump for a maximum of 180 seconds and drains water from the FC stack assembly. When performing inspection or repairs with the power switch off (not on (IG) or on (READY)), disconnect the cable from the negative (-) auxiliary battery terminal before performing work (If the auxiliary battery voltage is needed to conduct inspection, warm up the FC system beforehand).

  • 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

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  • Drive the vehicle for approximately 10 minutes referring to the following freeze frame data or Data List items: "Vehicle Speed".

PROCEDURE


  1. CHECK DTC OUTPUT (FCDC)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / FCDC / Trouble Codes.


      Powertrain > FCDC > Trouble Codes

    5. Check for DTCs.

      Result
      Result Proceed to
      "DTC P1D4F-450 only is output" or "DTCs except the ones in the table below are also output" A
      Any of the following DTCs are also output B
      Malfunction Content Relevant DTC
      Sensor and actuator circuit malfunction P1D31-450 U Phase Reactor Current Sensor Circuit (Offset)
      P1D32-450 U Phase Reactor Current Sensor Circuit Low
      P1D33-450 U Phase Reactor Current Sensor Circuit High
      P1D36-450 V Phase Reactor Current Sensor Circuit (Offset)
      P1D37-450 V Phase Reactor Current Sensor Circuit Low
      P1D38-450 V Phase Reactor Current Sensor Circuit High
      P1D3B-450 W Phase Reactor Current Sensor Circuit (Offset)
      P1D3C-450 W Phase Reactor Current Sensor Circuit Low
      P1D3D-450 W Phase Reactor Current Sensor Circuit High
      P1D41-450 X Phase Reactor Current Sensor Circuit (Offset)
      P1D42-450 X Phase Reactor Current Sensor Circuit Low
      P1D43-450 X Phase Reactor Current Sensor Circuit High

      Tech Tips

      DTC P1D4F-450 may be output as a result of the malfunction indicated by the DTCs above.

    6. Turn the power switch off.


    B

    GO TO DTC CHART (FC BOOST CONTROL SYSTEM) Click here

    A

  2. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / FCDC / Trouble Codes.


      Powertrain > FCDC > Clear DTCs

    5. Clear the DTCs.

      Result
      Proceed to
      NEXT

    6. Turn the power switch off and wait for 3 minutes or more.


    NEXT

  3. CHECK DTC OUTPUT (FCDC)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / FCDC / Trouble Codes.


      Powertrain > FCDC > Trouble Codes

    5. Check for DTCs.

      Result
      Result Proceed to
      DTCs are not output A
      DTC P1D4F-450 only is output B
      Any of the following DTCs are output C
      Malfunction Content Relevant DTC
      Sensor and actuator circuit malfunction P1D31-450 U Phase Reactor Current Sensor Circuit (Offset)
      P1D32-450 U Phase Reactor Current Sensor Circuit Low
      P1D33-450 U Phase Reactor Current Sensor Circuit High
      P1D36-450 V Phase Reactor Current Sensor Circuit (Offset)
      P1D37-450 V Phase Reactor Current Sensor Circuit Low
      P1D38-450 V Phase Reactor Current Sensor Circuit High
      P1D3B-450 W Phase Reactor Current Sensor Circuit (Offset)
      P1D3C-450 W Phase Reactor Current Sensor Circuit Low
      P1D3D-450 W Phase Reactor Current Sensor Circuit High
      P1D41-450 X Phase Reactor Current Sensor Circuit (Offset)
      P1D42-450 X Phase Reactor Current Sensor Circuit Low
      P1D43-450 X Phase Reactor Current Sensor Circuit High

      Tech Tips

      DTC P1D4F-450 may be output as a result of the malfunction indicated by the DTCs above.

    6. Turn the power switch off.


    B

    REPLACE FC CONVERTER ASSEMBLY Click here

    C

    GO TO DTC CHART (FC BOOST CONTROL SYSTEM) Click here

    A

  4. SIMULATION TEST


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (READY). (A)

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / FCDC / Data List / FC Output Power


      Powertrain > FCDC > Data List
      Tester Display
      FC Output Power

    5. Accelerate the vehicle to approximately 80 km/h (50 mph). (B)

    6. While checking the Data List item "FC Output Power", depress the accelerator pedal and ensure that all conditions stated below are met. (C)

      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

      Driving condition
      Data List item "FC Output Power" value remains 65 kW or more for at least 2 seconds.
      B000ZTJE01

    7. Enter the following menus: Powertrain / FCDC / Trouble Codes. (D)


      Powertrain > FCDC > Trouble Codes

    8. Check for DTCs.

      Result
      Result Proceed to
      DTCs are not output A
      DTC P1D4F-450 only is output B
      Any of the following DTCs are output C
      Malfunction Content Relevant DTC
      Sensor and actuator circuit malfunction P1D31-450 U Phase Reactor Current Sensor Circuit (Offset)
      P1D32-450 U Phase Reactor Current Sensor Circuit Low
      P1D33-450 U Phase Reactor Current Sensor Circuit High
      P1D36-450 V Phase Reactor Current Sensor Circuit (Offset)
      P1D37-450 V Phase Reactor Current Sensor Circuit Low
      P1D38-450 V Phase Reactor Current Sensor Circuit High
      P1D3B-450 W Phase Reactor Current Sensor Circuit (Offset)
      P1D3C-450 W Phase Reactor Current Sensor Circuit Low
      P1D3D-450 W Phase Reactor Current Sensor Circuit High
      P1D41-450 X Phase Reactor Current Sensor Circuit (Offset)
      P1D42-450 X Phase Reactor Current Sensor Circuit Low
      P1D43-450 X Phase Reactor Current Sensor Circuit High

      Tech Tips

      DTC P1D4F-450 may be output as a result of the malfunction indicated by the DTCs above.

    9. Turn the power switch off.


    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE FC CONVERTER ASSEMBLY Click here

    C

    GO TO DTC CHART (FC BOOST CONTROL SYSTEM) Click here