FC CONTROL SYSTEM, Diagnostic DTC:P1E19-450

DTC Code DTC Name
P1E19-450 Infrared Transmitter Circuit

DESCRIPTION

The hydrogen fuel control transmitter is mounted on the receptacle bracket. The transmitter sends information such as the hydrogen tank capacity, tank internal hydrogen pressure and temperature to a hydrogen station through infrared communication channels (unidirectional communication).

The hydrogen fuel control ECU monitors accumulated actuation currents of the hydrogen fuel control transmitter to detect open circuits, and when the power source mode becomes on (IG) with the fuel lid open, the FC control ECU stores a DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P1E19-450 Infrared Transmitter Circuit While infrared communication signals are sent (the fuel lid is interpreted as it being open*), the transmitted current value that is accumulated for 110 seconds is less than 80 mA.

  • Hydrogen fuel control transmitter

  • Hydrogen fuel control ECU assembly

  • Wire harness or connector

 Master Warning Light: Does not come on

*: If the fuel lid has remained open for more than 60 minutes, the hydrogen fuel control ECU will enter sleep mode, and the infrared signal transmission will also stop.


Related Data List
DTC No. Data List
P1E19-450 -

Tech Tips

It is suspected that the hydrogen fuel control transmitter or hydrogen fuel control ECU is malfunctioning, there is an open or short in the circuit, or a short in the +B circuit.

WIRING DIAGRAM

A01MJALE04

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 off.

  2. Press the fuel lid opener switch.

  3. Fully open the fuel lid and wait for 2 minutes.

  4. With the fuel lid fully opened, turn the power switch on (IG).

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (HYDROGEN FUEL CONTROL ECU ASSEMBLY - HYDROGEN FUEL CONTROL TRANSMITTER)


    1. Disconnect the hydrogen fuel control ECU assembly connector.

    2. A01MG5K

      Disconnect the hydrogen fuel control transmitter connector.

    3. A01MJ9MC03
      *a

      Front view of wire harness connector

      (to Hydrogen Fuel Control Transmitter)
      *b

      Front view of wire harness connector

      (to Hydrogen Fuel Control ECU Assembly)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P30-20 (VSEO) - h1-3 (VSEO) Always Below 1 Ω
      P30-21 (SEO) - h1-2 (SEO) Always Below 1 Ω
      P30-22 (GSEO) - h1-1 (GSEO) Always Below 1 Ω
      P30-20 (VSEO) or h1-3 (VSEO) - Body ground and other terminals Always 10 kΩ or higher
      P30-21 (SEO) or h1-2 (SEO) - Body ground and other terminals Always 10 kΩ or higher

    4. Turn the power switch on (IG).

    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      P30-20 (VSEO), P30-21 (SEO) or P30-22 (GSEO) - Body ground Power switch on (IG) Below 1 V

    6. Turn the power switch off.

    7. Reconnect the hydrogen fuel control transmitter connector.

    8. Reconnect the hydrogen fuel control ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (HYDROGEN FUEL CONTROL ECU ASSEMBLY - HYDROGEN FUEL CONTROL WIRE) Click here

    OK

  2. REPLACE HYDROGEN FUEL CONTROL TRANSMITTER

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  3. 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 / FC / Trouble Codes.

    5. Clear the DTCs.


      Powertrain > FC > Clear DTCs

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

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK DTC OUTPUT


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Press the fuel lid opener switch.

    4. Fully open the fuel lid and wait for 2 minutes.

    5. With the fuel lid fully opened, turn the power switch on (IG).

    6. Turn the GTS on.

    7. Enter the following menus: Powertrain / FC / Trouble Codes.

    8. Check for DTCs.


      Powertrain > FC > Trouble Codes
      Result
      Result Proceed to
      DTC P1E19-450 is output A
      DTCs are not output B

    9. Turn the power switch off.


    A

    REPLACE HYDROGEN FUEL CONTROL ECU ASSEMBLY Click here

    B

    END

  5. CHECK HARNESS AND CONNECTOR (HYDROGEN FUEL CONTROL ECU ASSEMBLY - HYDROGEN FUEL CONTROL WIRE)


    1. Disconnect the hydrogen fuel control ECU assembly connector.

    2. A01MGU8

      Disconnect the hydrogen fuel control wire connector.

    3. A01MI9OC01
      *a

      Front view of wire harness connector

      (to Hydrogen Fuel Control Wire)
      *b

      Front view of wire harness connector

      (to Hydrogen Fuel Control ECU Assembly)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P30-20 (VSEO) - Vh1-4 (VSEO) Always Below 1 Ω
      P30-21 (SEO) - Vh1-2 (SEO) Always Below 1 Ω
      P30-22 (GSEO) - Vh1-1 (GSEO) Always Below 1 Ω
      P30-20 (VSEO) or Vh1-4 (VSEO) - Body ground and other terminals Always 10 kΩ or higher
      P30-21 (SEO) or Vh1-2 (SEO) - Body ground and other terminals Always 10 kΩ or higher

    4. Turn the power switch on (IG).

    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      P30-20 (VSEO), P30-21 (SEO) or P30-22 (GSEO) - Body ground Power switch on (IG) Below 1 V

    6. Turn the power switch off.

    7. Reconnect the hydrogen fuel control wire connector.

    8. Reconnect the hydrogen fuel control ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYDROGEN FUEL CONTROL WIRE

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR