HYBRID CONTROL SYSTEM, Diagnostic DTC:P1D8F-475

DTC Code DTC Name
P1D8F-475 FC Air Compressor Motor "A" Control Module

DESCRIPTION

The MG ECU, which is built into the inverter with converter assembly, monitors its internal operation and will store DTCs if the system is malfunctioning. If any of the following DTCs are output, replace the inverter with converter assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P1D8F-475 FC Air Compressor Motor "A" Control Module

MG ECU internal malfunction:

Run pulse signal cycle deviation or stop

(1 trip detection logic)

  • Auxiliary battery

  • Inverter with converter assembly

Master Warning Light:

Comes on

CAUTION / NOTICE / HINT

Note

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).

Tech Tips

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


  1. Turn the power switch on (IG) and wait for 5 seconds or more.

PROCEDURE


  1. CHECK FREEZE FRAME DATA (AUXILIARY BATTERY VOLTAGE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / EV / Trouble Codes.


      Powertrain > EV > Trouble Codes

    4. Read the freeze frame data of DTC P1D8F-475.

      Result
      Result Proceed to
      "Auxiliary Battery Voltage" is lower than 11 V. A
      "Auxiliary Battery Voltage" is 11 V or higher. B

    5. Turn the power switch off.


    B

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here

    A

  2. CHECK AUXILIARY BATTERY

    Click here

    Result
    Proceed to
    NEXT

    NEXT

    COMPLETED