FC CONTROL SYSTEM, Diagnostic DTC:P1E36-450, P1E38-450

DTC Code DTC Name
P1E36-450 Tank Shut Valve 1 Stuck Open or Close
P1E38-450 Tank Shut Valve 2 Stuck Open or Close

DESCRIPTION

The hydrogen system of the FC system feeds the FC stack with hydrogen, so that the FC stack can generate power. The tank shut valve is a valve that opens or closes so as to allow compressed hydrogen to flow from the hydrogen tank to the FC stack when the system is in operation. The tank shut valve is provided on each of the 2 hydrogen tank assemblies, and it will open when the system starts operating, and will close when the system shuts off.

If either one of the tank shut valves remains stuck open or closed due to mechanical malfunctions, changes in the hydrogen pressure will cause a DTC to set.

The tank shut valve 1 is built into the No. 1 hydrogen tank assembly, and the tank shut valve 2 is in the No. 2 hydrogen tank assembly.

For the circuit diagram, refer to DTC P1E40-450.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P1E36-450 Tank Shut Valve 1 Stuck Open or Close

Either of following conditions (1) or (2) is met:

(1) Tank shut valve is stuck open:

Tank shut valve 1 or both tank shut valves cannot close.


  • When the power switch is turned from on (READY)(FC Working) to off, a change in the high-range hydrogen pressure is small.

(2) Tank shut valve is stuck closed:

Tank shut valve 1 does not open.


  1. When the power switch is in ON (READY)(FC Working), the high-range hydrogen pressure and the amount of power generated are compared each other all the time (pre-determination).

  2. During the FC Startup Process, tank shut valves 1 and 2 are actuated separately for final determination, and a change in the pressure is small when tank shut valve 1 is operated.

(1 trip detection logic)

 No. 1 hydrogen tank assembly (tank shut valve 1) Master Warning Light: Comes on
P1E38-450 Tank Shut Valve 2 Stuck Open or Close

Either of following conditions (1) or (2) is met:

(1) Tank shut valve is stuck open:

Tank shut valve 2 or both tank shut valves cannot close.


  • When the power switch is turned from on (READY)(FC Working) to off, a change in the high-range hydrogen pressure is small.

(2) Tank shut valve is stuck closed:

Tank shut valve 2 does not open.


  1. When the power switch is in ON (READY)(FC Working), the high-range hydrogen pressure and the amount of power generated are compared each other all the time (pre-determination).

  2. During the FC Startup Process, tank shut valves 1 and 2 are actuated separately for final determination, and a change in the pressure is small when tank shut valve 2 is operated.

(1 trip detection logic)

 No. 2 hydrogen tank assembly (tank shut valve 2) Master Warning Light: Comes on

Tech Tips


  • If both tank shut valves 1 and 2 do not open, the FC system will shut off.

  • If either one of the tank shut valves does not open, the distance the vehicle can travel will be shorter.

  • If either of or both tank shut valve 1 and 2 remain stuck open, both DTCs P1E36-450 and P1E38-450 will be output.

Detection timing
Vehicle Condition

FC shutdown

(power switch on (IG))

 FC startup process FC intermittent operation

FC is generating power

(vehicle is in stationary)

FC is generating power

(vehicle is traveling)

 FC shutdown process

Data List

"FC Mode"

 FC Shutdown FC Startup Process FC Working FC Shutdown Process

Data List

"FC Intermittent Operation"

 OFF ON OFF OFF
DTC Detection - ○ - (○)* (○)* ○

Tech Tips


  • By accessing the "FC Mode" in the freeze frame data, the FC system condition at the time the malfunction occurred can be checked.

  • *: This is for pre-determination (for stuck closed). Final determination is conducted during the FC Startup Process.

  • Stuck open malfunction is identified only during the FC Shutdown Process.

Related Data List
DTC No. Data List
P1E36-450 Smoothed Value of High-range Hydrogen Pressure
P1E38-450

The following items can be helpful when performing repairs:



CAUTION / NOTICE / HINT

Note


  • If both tank shut valve 1 and 2 have remained stuck closed, the "Smoothed Value of High-range Hydrogen Pressure" will not increase, and the FC system will be unable to start.

  • 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


  • Forcing the SOC of the EV battery to decrease by applying electrical loads such as turning on the air conditioning (HOT MAX, maximum airflow), or depressing the accelerator pedal with the shift lever in P, the "FC Intermittent Operation" of the Data List is easily to enter OFF (power generation mode).

Operations after repair:


    - If only P1E36-450 or P1E38-450 is output (tank shut valve has stuck closed), clear the DTC and then perform the following instructions to check if the tank shut valve operates.

  1. Turn the power switch on (READY) with the shift lever in P, and check the Data List that "FC Mode" is FC Working.

  2. Record the "Smoothed Value of High-range Hydrogen Pressure" of the Data List. (1)

  3. Turn the power switch off and wait for 3 minutes or more.*1

  4. Disconnect the R3 No. 2 hydrogen tank assembly (tank shut valve 2) connector.

  5. Turn the power switch on (READY).

    Note

    Perform operations (2) and (3) instructed below within 5 seconds of turning the power switch on (READY).

  6. Read the "Smoothed Value of High-range Hydrogen Pressure" of the Data List. (2)

  7. Turn the power switch off.*1 (3)

  8. Check that the value obtained in operation (2) is close to the value recorded in operation (1).

    Tech Tips

    If the "Smoothed Value of High-range Hydrogen Pressure" of the Data List does not increase up to the recorded value in operation (1), tank shut valve 1 has stuck closed.

  9. Reconnect the R3 No. 2 hydrogen tank assembly (tank shut valve 2) connector.

  10. Disconnect the R2 No. 1 hydrogen tank assembly (tank shut valve 1) connector.

  11. Turn the power switch on (READY).

    Note

    Perform operations (4) and (5) instructed below within 5 seconds of turning the power switch on (READY).

  12. Read the "Smoothed Value of High-range Hydrogen Pressure" of the Data List. (4)

  13. Turn the power switch off.*1 (5)

  14. Check that the value obtained in operation (4) is close to the value recorded in operation (1).

    Tech Tips

    If the "Smoothed Value of High-range Hydrogen Pressure" of the Data List does not increase up to the recorded value in operation (1), tank shut valve 2 has stuck closed.

  15. Reconnect the R2 No. 1 hydrogen tank assembly (tank shut valve 1) connector.

  16. Clear the DTCs.

    Note


    • Disconnecting the hydrogen tank assembly connector may cause DTCs to be set. Thus, check for DTCs and clear them after completion of the operations.

    • If the No. 1 (or No. 2) hydrogen tank assembly connector is disconnected (tank shut valve is closed) when tank shut valve 1 (or 2) has stuck closed, the hydrogen supply to the hydrogen supply line will be blocked even when the power switch is on (READY). At this time, "Hydrogen Empty Low Level" may be stored in the vehicle control history, so check the vehicle control history after completion of repair, and delete it before returning the vehicle to the customer if it is recorded.


    • *1: After the power switch is turned off, the "Smoothed Valve of High-range Hydrogen Pressure" is reduced to depressurized by 5000 to 10000 kPa due to system shutdown control.


    - If both P1E36-450 and P1E38-450 are output (tank shut valve has stuck open), clear the DTCs and then perform the following instructions to check that the DTCs are not output.

  1. Turn the power switch on (READY) with the shift lever in P, and check the Data List that "FC Mode" is FC Working.

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

  3. Turn the power switch on (READY).

PROCEDURE


  1. CHECK DTC OUTPUT

    Note

    The freeze frame data is cleared when DTCs are cleared. Be sure to make a note of necessary data in advance.


    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. Check for DTCs.


      Powertrain > FC > Trouble Codes
      Result
      Result Proceed to
      P1E36-450 or P1E38-450 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 P1E02-450 Tank Shut Valve1 Circuit Low
      P1E03-450 Tank Shut Valve1 Circuit High
      P1E12-450 Tank Shut Valve2 Circuit Low
      P1E13-450 Tank Shut Valve2 Circuit High
      System Malfunction P1DB1-450 High-range Hydrogen Pressure Sensor Correlation

      Tech Tips

      DTC P1E36-450 or P1E38-450 may be set due to problems that cause the DTCs shown above to be output. If such happens, troubleshoot the suspected area(s) corresponding to the output DTC(s) in order of the listed DTCs shown in the table above.

    6. Turn the power switch off.


    B

    GO TO DTC CHART 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 / 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

  3. CHECK FREEZE FRAME DATA (FC MODE)


    1. Read the recorded DTC(s) and the "FC Mode" in the freeze frame data.

      Result
      DTC No. "FC Mode" in the Freeze Frame Data Proceed to
      P1E36-450 FC Startup Process A
      P1E38-450 FC Startup Process B
      P1E36-450 and P1E38-450 FC Shutdown Process C

      Tech Tips


      • If DTCs are set while the "FC Mode" is in the FC Startup Process, a tank shut valve has stuck closed.

      • If DTCs are set while the "FC Mode" is in the FC Shutdown Process, a tank shut valve has stuck open. When a stuck-open malfunction is found, the system sets P1E36-450 and P1E38-450 together.

    2. Turn the power switch off.


    B

    READ VALUE USING GTS (SMOOTHED VALUE OF HIGH-RANGE HYDROGEN PRESSURE) Click here

    C

    READ VALUE USING GTS (SMOOTHED VALUE OF HIGH-RANGE HYDROGEN PRESSURE) Click here

    A

  4. READ VALUE USING GTS (SMOOTHED VALUE OF HIGH-RANGE HYDROGEN PRESSURE)

    Tech Tips

    This procedure is for troubleshooting tank shut valve 1 that has stuck closed.


    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 / Data List / FC Mode, Smoothed Value of High-range Hydrogen Pressure


      Powertrain > FC > Data List
      Tester Display
      FC Mode
      Smoothed Value of High-range Hydrogen Pressure

    5. Turn the power switch on (READY) with the shift lever in P, and check the Data List that "FC Mode" is FC Working.

    6. Record the "Smoothed Value of High-range Hydrogen Pressure" of the Data List. (1)

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

      Tech Tips

      After the power switch is turned off, the "Smoothed Valve of High-range Hydrogen Pressure" is reduced to depressurized by 5000 to 10000 kPa due to system shutdown control.

    8. Remove the under cover.

    9. Remove the 3 bolts to separate the FC exhaust pipe.

      B006JD6
    10. A01MFUCC02
      *a Adjustment Bolt
      *b Manual Valve Open
      *c Manual Valve Closed
      *d Clockwise

      Using an 8 mm hexagon socket wrench, rotate the adjustment bolt clockwise to close the manual valve of the No. 2 hydrogen tank assembly.

      Torque
      20 N*m (204 kgf*cm, 15 ft.*lbf)

      Note


      • The manual valve is the component that shuts off the pressure from the hydrogen tank assembly, so be careful not to damage the hexagonal portion.

      • If the hexagonal portion has been damaged, the No. 2 hydrogen tank assembly must be replaced.

    11. Turn the power switch on (IG).

    12. Turn the GTS on.

    13. Enter the following menus: Powertrain / FC / Data List / Smoothed Value of High-range Hydrogen Pressure


      Powertrain > FC > Data List
      Tester Display
      Smoothed Value of High-range Hydrogen Pressure

    14. Turn the power switch on (READY).

      Note


      • Perform operations (2) and (3) instructed below within 5 seconds of turning the power switch on (READY).

      • If the manual valve of the No. 2 hydrogen tank assembly is forced to close when tank shut valve 1 has stuck closed, the hydrogen supply to the hydrogen supply line will be blocked even when the power switch is on (READY). At this time, "Hydrogen Empty Low Level" may be stored in the vehicle control history, so check the vehicle control history after completion of repair, and delete it before returning the vehicle to the customer if it is recorded.

      Tech Tips

      If hydrogen supply from the No. 1 hydrogen tank assembly is blocked due to a stuck-closed malfunction in tank shut valve 1, shutting the manual valve of the No. 2 hydrogen tank assembly will stop the hydrogen supply to the FC stack, as a result, the FC system will be disabled ("FC Mode" of the Data List will not enter the FC Working).

    15. Read the "Smoothed Value of High-range Hydrogen Pressure" of the Data List. (2)

      Result
      Result Proceed to
      "Smoothed Value of High-range Hydrogen Pressure" has increased up to the value recorded in operation (1). A
      Other than above B

    16. Turn the power switch off. (3)

    17. A01MHFCC02
      *a Adjust Bolt
      *b Plug
      *c Manual Valve Closed
      *d Manual Valve Open
      *e Counterclockwise

      Using an 8 mm socket hexagon wrench, rotate the adjustment bolt counterclockwise until it contacts the plug, and open the No. 2 hydrogen tank assembly manual valve.

      Note


      • The manual valve is the component that shuts off the pressure from the hydrogen tank assembly, so be careful not to damage the hexagonal portion.

      • If the hexagonal portion has been damaged, the No. 2 hydrogen tank assembly must be replaced.

    18. Install the FC exhaust pipe to the vehicle body with the bolt.

    19. Install the under cover.


    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE NO. 1 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 1) Click here

  5. READ VALUE USING GTS (SMOOTHED VALUE OF HIGH-RANGE HYDROGEN PRESSURE)

    Tech Tips

    This procedure is for troubleshooting tank shut valve 2 that has stuck closed.


    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 / Data List / FC Mode, Smoothed Value of High-range Hydrogen Pressure


      Powertrain > FC > Data List
      Tester Display
      FC Mode
      Smoothed Value of High-range Hydrogen Pressure

    5. Turn the power switch on (READY) with the shift lever in P, and check the Data List that "FC Mode" is FC Working.

    6. Record the "Smoothed Value of High-range Hydrogen Pressure" of the Data List. (1)

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

      Tech Tips

      After the power switch is turned off, the "Smoothed Valve of High-range Hydrogen Pressure" is reduced to depressurized by 5000 to 10000 kPa due to system shutdown control.

    8. Remove the under cover.

    9. Remove the 3 bolts to separate the FC exhaust pipe.

      B006JD6
    10. A01MH3CC02
      *a Adjustment Bolt
      *b Manual Valve Open
      *c Manual Valve Closed
      *d Clockwise

      Using an 8 mm hexagon socket wrench, rotate the adjustment bolt clockwise to close the manual valve of the No. 1 hydrogen tank assembly.

      Torque
      20 N*m (204 kgf*cm, 15 ft.*lbf)

      Note


      • The manual valve is the component that shuts off the pressure from the hydrogen tank assembly, so be careful not to damage the hexagonal portion.

      • If the hexagonal portion has been damaged, the No. 1 hydrogen tank assembly must be replaced.

    11. Turn the power switch on (IG).

    12. Turn the GTS on.

    13. Enter the following menus: Powertrain / FC / Data List / Smoothed Value of High-range Hydrogen Pressure


      Powertrain > FC > Data List
      Tester Display
      Smoothed Value of High-range Hydrogen Pressure

    14. Turn the power switch on (READY).

      Note


      • Perform operations (2) and (3) instructed below within 5 seconds of turning the power switch on (READY).

      • If the manual valve of the No. 1 hydrogen tank assembly is forced to close when tank shut valve 2 has stuck closed, the hydrogen supply to the hydrogen supply line will be blocked even when the power switch is on (READY). At this time, "Hydrogen Empty Low Level" may be stored in the vehicle control history, so check the vehicle control history after completion of repair, and delete it before returning the vehicle to the customer if it is recorded.

      Tech Tips

      If hydrogen supply from the No. 2 hydrogen tank assembly is blocked due to a stuck-closed malfunction in tank shut valve 2, shutting the manual valve of the No. 1 hydrogen tank assembly will stop the hydrogen supply to the FC stack, as a result, the FC system will be disabled ("FC Mode" of the Data List will not enter the FC Working).

    15. Read the "Smoothed Value of High-range Hydrogen Pressure" of the Data List. (2)

      Result
      Result Proceed to
      "Smoothed Value of High-range Hydrogen Pressure" has increased up to the value recorded in operation (1). A
      Other than above B

    16. Turn the power switch off. (3)

    17. A01MGEGC02
      *a Adjustment Bolt
      *b Plug
      *c Manual Valve Closed
      *d Manual Valve Open
      *e Counterclockwise

      Using an 8 mm socket hexagon wrench, rotate the adjustment bolt counterclockwise until it contacts the plug, and open the No. 1 hydrogen tank assembly manual valve.

      Note


      • The manual valve is the component that shuts off the pressure from the hydrogen tank assembly, so be careful not to damage the hexagonal portion.

      • If the hexagonal portion has been damaged, the No. 1 hydrogen tank assembly must be replaced.

    18. Install the FC exhaust pipe to the vehicle body with the bolt.

    19. Install the under cover.


    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE NO. 2 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 2) Click here

  6. READ VALUE USING GTS (SMOOTHED VALUE OF HIGH-RANGE HYDROGEN PRESSURE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (READY).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / FC / Data List / Smoothed Value of High-range Hydrogen Pressure


      Powertrain > FC > Data List
      Tester Display
      Smoothed Value of High-range Hydrogen Pressure

    5. Read the value displayed on the GTS.

      Result
      Result Proceed to
      "Smoothed Value of High-range Hydrogen Pressure" in the Data List is less than 10000 kPa(abs) A
      Other than above B

    6. Turn the power switch off.


    B

    GO TO STEP 8 Click here

    A

  7. CHARGE HYDROGEN GAS


    1. Fill the tank until the "Smoothed Value of High-range Hydrogen Pressure" in the Data List exceeds 10000 kPa(abs).

      Result
      Proceed to
      NEXT

    NEXT

  8. READ VALUE USING GTS (SMOOTHED VALUE OF HIGH-RANGE HYDROGEN PRESSURE)

    Tech Tips

    This procedure is for troubleshooting tank shut valve 1 that has stuck open.


    1. Turn the power switch off.

    2. Remove the under cover.

    3. Remove the 3 bolts to separate the FC exhaust pipe.

      B006JD6
    4. A01MFUCC02
      *a Adjustment Bolt
      *b Manual Valve Open
      *c Manual Valve Closed
      *d Clockwise

      Using an 8 mm hexagon socket wrench, rotate the adjustment bolt clockwise to close the manual valve of the No. 2 hydrogen tank assembly.

      Torque
      20 N*m (204 kgf*cm, 15 ft.*lbf)

      Note


      • The manual valve is the component that shuts off the pressure from the hydrogen tank assembly, so be careful not to damage the hexagonal portion.

      • If the hexagonal portion has been damaged, the No. 2 hydrogen tank assembly must be replaced.

    5. Connect the GTS to the DLC3.

    6. Turn the power switch on (IG).

    7. Turn the GTS on.

    8. Enter the following menus: Powertrain / FC / Data List / FC Mode, Smoothed Value of High-range Hydrogen Pressure


      Powertrain > FC > Data List
      Tester Display
      FC Mode
      Smoothed Value of High-range Hydrogen Pressure

    9. Turn the power switch on (READY) with the shift lever in P, and check the Data List that "FC Mode" is FC Working.

    10. Record the "Smoothed Value of High-range Hydrogen Pressure" of the Data List. (1)

    11. Turn the power switch off and wait for 2 minutes.

    12. Turn the power switch on (IG).

    13. Turn the GTS on.

    14. Enter the following menus: Powertrain / FC / Data List / Smoothed Value of High-range Hydrogen Pressure


      Powertrain > FC > Data List
      Tester Display
      Smoothed Value of High-range Hydrogen Pressure

    15. Read the "Smoothed Value of High-range Hydrogen Pressure" of the Data List. (2)

      Figure 1. Reference example (Manual valve of the No. 2 hydrogen tank assembly is closed)

      A01MJLZE01
      Result
      Result Proceed to
      Value in (2) has decreased (by 5000 to 10000 kPa) from the "Smoothed Value of High-range Hydrogen Pressure" recorded in (1) A
      Value in (2) equals the "Smoothed Value of High-range Hydrogen Pressure" recorded in (1) B

      Tech Tips

      Normally, the "Smoothed Valve of High-range Hydrogen Pressure" is depressurized by 5000 to 10000 kPa due to system shutdown control. If the pressure does not decrease, it is suspected that the tank shut valve has suck fully open, or stopped on the way to the full close position.

    16. Turn the power switch off.

    17. A01MHFCC02
      *a Adjustment Bolt
      *b Plug
      *c Manual Valve Closed
      *d Manual Valve Open
      *e Counterclockwise

      Using an 8 mm socket hexagon wrench, rotate the adjustment bolt counterclockwise until it contacts the plug, and open the No. 2 hydrogen tank assembly manual valve.

      Note


      • The manual valve is the component that shuts off the pressure from the hydrogen tank assembly, so be careful not to damage the hexagonal portion.

      • If the hexagonal portion has been damaged, the No. 2 hydrogen tank assembly must be replaced.

    18. Install the FC exhaust pipe to the vehicle body with the bolt.

    19. Install the under cover.


    B

    REPLACE NO. 1 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 1) Click here

    A

  9. READ VALUE USING GTS (SMOOTHED VALUE OF HIGH-RANGE HYDROGEN PRESSURE)

    Tech Tips

    This procedure is for troubleshooting tank shut valve 2 that has stuck open.


    1. Turn the power switch off.

    2. Remove the under cover.

    3. Remove the 3 bolts to separate the FC exhaust pipe.

      B006JD6
    4. A01MH3CC02
      *a Adjustment Bolt
      *b Manual Valve Open
      *c Manual Valve Closed
      *d Clockwise

      Using an 8 mm hexagon socket wrench, rotate the adjustment bolt clockwise to close the manual valve of the No. 1 hydrogen tank assembly.

      Torque
      20 N*m (204 kgf*cm, 15 ft.*lbf)

      Note


      • The manual valve is the component that shuts off the pressure from the hydrogen tank assembly, so be careful not to damage the hexagonal portion.

      • If the hexagonal portion has been damaged, the No. 1 hydrogen tank assembly must be replaced.

    5. Connect the GTS to the DLC3.

    6. Turn the power switch on (IG).

    7. Turn the GTS on.

    8. Enter the following menus: Powertrain / FC / Data List / FC Mode, Smoothed Value of High-range Hydrogen Pressure


      Powertrain > FC > Data List
      Tester Display
      FC Mode
      Smoothed Value of High-range Hydrogen Pressure

    9. Turn the power switch on (READY) with the shift lever in P, and check the Data List that "FC Mode" is FC Working.

    10. Record the "Smoothed Value of High-range Hydrogen Pressure" of the Data List. (1)

    11. Turn the power switch off and wait for 2 minutes.

    12. Turn the power switch on (IG).

    13. Turn the GTS on.

    14. Enter the following menus: Powertrain / FC / Data List / Smoothed Value of High-range Hydrogen Pressure


      Powertrain > FC > Data List
      Tester Display
      Smoothed Value of High-range Hydrogen Pressure

    15. Read the "Smoothed Value of High-range Hydrogen Pressure" of the Data List. (2)

      Figure 2. Reference example (Manual valve of the No. 1 hydrogen tank assembly is closed)

      A01MJLZE01
      Result
      Result Proceed to
      Value in (2) has decreased (by 5000 to 10000 kPa) from the "Smoothed Value of High-range Hydrogen Pressure" recorded in (1) A
      Value in (2) equals the "Smoothed Value of High-range Hydrogen Pressure" recorded in (1) B

      Tech Tips

      Normally, the "Smoothed Valve of High-range Hydrogen Pressure" is depressurized by 5000 to 10000 kPa due to system shutdown control. If the pressure does not decrease, it is suspected that the tank shut valve has suck fully open, or stopped on the way to the full close position.

    16. Turn the power switch off.

    17. A01MGEGC02
      *a Adjustment Bolt
      *b Plug
      *c Manual Valve Closed
      *d Manual Valve Open
      *e Counterclockwise

      Using an 8 mm socket hexagon wrench, rotate the adjustment bolt counterclockwise until it contacts the plug, and open the No. 1 hydrogen tank assembly manual valve.

      Note


      • The manual valve is the component that shuts off the pressure from the hydrogen tank assembly, so be careful not to damage the hexagonal portion.

      • If the hexagonal portion has been damaged, the No. 1 hydrogen tank assembly must be replaced.

    18. Install the FC exhaust pipe to the vehicle body with the bolt.

    19. Install the under cover.


    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE NO. 2 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 2) Click here