FC CONTROL SYSTEM, Diagnostic DTC:P1E6B-450

DTC Code DTC Name
P1E6B-450 Fuel Lid Interlock Stuck Closed

DESCRIPTION

If the fuel filler opening lid sub-assembly (hinge switch) signal indicates that the fuel lid is closed although the hydrogen tank internal pressure is increasing due to hydrogen filling, the hydrogen fuel control ECU assembly interprets it as a malfunction of the fuel filler opening lid sub-assembly (hinge switch) circuit, and sets this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P1E6B-450 Fuel Lid Interlock Stuck Closed

While a fuel filler opening lid sub-assembly (hinge switch) close signal is input, "Hydrogen Filling System High Pressure" increases by more than 10 MPa due to hydrogen filling.

(1 trip detection logic)

  • Fuel filler opening lid sub-assembly (hinge switch)

  • Hydrogen fuel control ECU assembly

  • Wire harness or connector

 Master Warning Light: Comes on
Related Data List
DTC No. Data List
P1E6B-450 Fuel Lid Interlock Switch

Tech Tips

It is suspected that there is a GND short in the fuel filler opening lid sub-assembly (hinge switch) circuit, or the fuel filler opening lid sub-assembly (hinge switch) has stuck closed.

WIRING DIAGRAM

A01MJE7E01
*a Fuel Filler Opening Lid Switch Sub-assembly
*b FILK
*c Fuel Filler Opening Lid Sub-assembly (Hinge Switch)
*d Hydrogen Fuel Control ECU Assembly

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 performing repairs, clear the DTCs, perform the following procedure, and then check the data list items "Fuel Lid Interlock SW".


  1. Turn the power switch off and press the fuel lid opener switch to unlock the fuel lid.

  2. Push the fuel lid to open it.

  3. Turn the power switch on (IG).

  4. By referring to the table below, check that the "Fuel Lid Interlock SW" of the data list turns ON or OFF in accordance with the fuel lid operation.

    Indication of the "Fuel Lid Interlock SW" in the data list
    Fuel lid fully closed Fuel lid fully open
    OFF ON

PROCEDURE


  1. INSPECT FUEL FILLER OPENING LID SUB-ASSEMBLY (HINGE SWITCH)

    Click here

    Result
    Proceed to
    OK
    NG

    NG

    REPLACE FUEL FILLER OPENING LID SUB-ASSEMBLY (HINGE SWITCH) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (HYDROGEN FUEL CONTROL ECU ASSEMBLY - FUEL FILLER OPENING LID SUB-ASSEMBLY (HINGE SWITCH))


    1. Disconnect the hydrogen fuel control ECU assembly connector.

    2. A01MGYJ

      Disconnect the fuel filler opening lid sub-assembly (hinge switch) connector.

    3. A01MJ9MC02
      *a

      Front view of wire harness connector

      (to Fuel Filler Opening Lid Sub-assembly (Hinge Switch))
      *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
      P35-2 (FILK) or P30-23 (FILK) - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the fuel filler opening lid sub-assembly (hinge switch) connector.

    5. Reconnect the hydrogen fuel control ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYDROGEN FUEL CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR