FC CONTROL SYSTEM, Diagnostic DTC:P1E02-450, P1E12-450

DTC Code DTC Name
P1E02-450 Tank Shut Valve1 Circuit Low
P1E12-450 Tank Shut Valve2 Circuit Low

DESCRIPTION

The tank shut valve is built into the hydrogen tank assembly so as to feed or shut off compressed hydrogen from the hydrogen tank to the FC stack. Actuation requests are made by the FC control ECU, and the hydrogen fuel control ECU receives such requests through CAN communication, and then actuates the tank shut valve. The hydrogen fuel control ECU uses the inrush current circuit when opening the valve, and uses the PWM circuit when holding the valve.

The hydrogen fuel control ECU detects abnormalities by monitoring valve actuation voltages.

The EV control ECU operates the tank shut valve relay.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P1E02-450 Tank Shut Valve1 Circuit Low

Tank shut valve relay has been requested to turn ON, the tank shut valve 1 is driven to ON, and the TNV1 voltage has remained at less than 0.3 V for more than 3 seconds.

(1 trip detection logic)

  • No. 1 hydrogen tank assembly (tank shut valve 1)

  • Hydrogen fuel control ECU assembly

  • Wire harness or connector

  • EV control ECU

  • Tank shut valve relay

 Master Warning Light: Comes on
P1E12-450 Tank Shut Valve2 Circuit Low

Tank shut valve relay has been requested to turn ON, the tank shut valve 2 is driven to ON, and the TNV2 voltage has remained at less than 0.3 V for more than 3 seconds.

(1 trip detection logic)

  • No. 2 hydrogen tank assembly (tank shut valve 2)

  • Hydrogen fuel control ECU assembly

  • Wire harness or connector

  • EV control ECU

  • Tank shut valve relay

 Master Warning Light: Comes on
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" and "FC Intermittent Operation" in the freeze frame data, the FC system condition at the time the malfunction occurred can be checked.

Related Data List
DTC No. Data List
P1E02-450

  • Tank Shut Valve 1 Voltage*1

  • Tank Shut Valve 1 Driving Request

  • Tank Shut Valve Power Supply Relay*2
P1E12-450

  • Tank Shut Valve 2 Voltage*1

  • Tank Shut Valve 2 Driving Request

  • Tank Shut Valve Power Supply Relay*2

WIRING DIAGRAM

A01MIKYE01

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses of circuits related to this system before performing the following procedure.

  • 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 (READY) with the shift lever in P and wait for 1 minute or more.

PROCEDURE


  1. CHECK DTC OUTPUT


    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
      DTC P1E02-450 is output A
      DTC P1E12-450 is output B
      DTC P1E02-450 and P1E12-450 are output C

    6. Turn the power switch off.


    B

    CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 2 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 2)) Click here

    C

    CHECK HARNESS AND CONNECTOR (HYDROGEN FUEL CONTROL ECU ASSEMBLY - TANK SHUT VALVE RELAY) Click here

    A

  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 1 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 1))


    1. A01MJ4S

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

    2. Turn the power switch on (IG).

    3. A01MFNXC01
      *a

      Front view of wire harness connector

      (to No. 1 Hydrogen Tank Assembly (Tank Shut Valve 1))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R2-4 (TVR1) - Body ground Power switch on (IG) 11 to 14 V

    4. Turn the power switch off.

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

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (NO. 1 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 1) - TANK SHUT VALVE RELAY) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 1 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 1) - HYDROGEN FUEL CONTROL ECU ASSEMBLY)


    1. A01MIA0C03
      *a

      Front view of wire harness connector

      (to No. 1 Hydrogen Tank Assembly (Tank Shut Valve 1))
      *b

      Front view of wire harness connector

      (to Hydrogen Fuel Control ECU Assembly)

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

    2. Disconnect the hydrogen fuel control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R2-6 (TNV1) - P30-6 (TNV1) Always Below 1 Ω
      R2-6 (TNV1) or P30-6 (TNV1) -Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the hydrogen fuel control ECU assembly connector.

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

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (HYDROGEN FUEL CONTROL ECU ASSEMBLY - BODY GROUND)


    1. Disconnect the hydrogen fuel control ECU assembly connector.

    2. A01MJTMC06
      *a

      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
      P30-1 (GTV1) - Body ground Always Below 1 Ω
      P30-2 (GTV2) - Body ground Always Below 1 Ω

    3. Reconnect the hydrogen fuel control ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK NO. 1 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 1)


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

    2. A01MITHC04
      *a

      Component without harness connected

      (No. 1 Hydrogen Tank Assembly (Tank Shut Valve 1))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4 (TVR1) - 6 (TNV1) 20°C (68°F) 1.3 to 3.3 Ω
      4 (TVR1) or 6 (TNV1) -Body ground and other terminals Always 1 MΩ or higher

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

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYDROGEN FUEL CONTROL ECU ASSEMBLY Click here

    NG

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

  6. CHECK HARNESS AND CONNECTOR (NO. 1 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 1) - TANK SHUT VALVE RELAY)


    1. A01MJ4S

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

    2. A01MIKD

      Disconnect the R3 No. 2 Hydrogen Tank Assembly (Tank Shut Valve 2) connector.

    3. Disconnect the P30 hydrogen fuel control ECU assembly connector.

    4. Remove the tank shut valve relay.

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

      A01MGBEC01
      *A for LHD *B for RHD
      *1 Tank Shut Valve Relay Holder - -
      *a

      Front view of wire harness connector

      (to No. 1 Hydrogen Tank Assembly (Tank Shut Valve 1))

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      R2-4 (TVR1) - G95-5 (Tank shut valve relay holder) Always Below 1 Ω
      R2-4 (TVR1) or G95-5 (Tank shut valve relay holder) - Body ground and other terminals Always 10 kΩ or higher

    6. Reinstall the tank shut valve relay.

    7. Reconnect the P30 hydrogen fuel control ECU assembly connector.

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

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

      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 11 Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 2 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 2))


    1. A01MIKD

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

    2. Turn the power switch on (IG).

    3. A01MFNXC02
      *a

      Front view of wire harness connector

      (to No. 2 Hydrogen Tank Assembly (Tank Shut Valve 2))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R3-4 (TVR2) - Body ground Power switch on (IG) 11 to 14 V

    4. Turn the power switch off.

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

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (NO. 2 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 2) - TANK SHUT VALVE RELAY) Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (NO. 2 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 2) - HYDROGEN FUEL CONTROL ECU ASSEMBLY)


    1. A01MIA0C04
      *a

      Front view of wire harness connector

      (to No. 2 Hydrogen Tank Assembly (Tank Shut Valve 2))
      *b

      Front view of wire harness connector

      (to Hydrogen Fuel Control ECU Assembly)

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

    2. Disconnect the hydrogen fuel control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R3-6 (TNV2) - P30-3 (TNV2) Always Below 1 Ω
      R3-6 (TNV2) or P30-3 (TNV2) -Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the hydrogen fuel control ECU assembly connector.

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

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK NO. 2 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 2)


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

    2. A01MITHC05
      *a

      Component without harness connected

      (No. 2 Hydrogen Tank Assembly (Tank Shut Valve 2))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4 (TVR2) - 6 (TNV2) 20°C (68°F) 1.3 to 3.3 Ω
      4 (TVR2) or 6 (TNV2) -Body ground and other terminals Always 1 MΩ or higher

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

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYDROGEN FUEL CONTROL ECU ASSEMBLY Click here

    NG

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

  10. CHECK HARNESS AND CONNECTOR (NO. 2 HYDROGEN TANK ASSEMBLY (TANK SHUT VALVE 2) - TANK SHUT VALVE RELAY)


    1. A01MJ4S

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

    2. A01MIKD

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

    3. Disconnect the P30 hydrogen fuel control ECU assembly connector.

    4. Remove the tank shut valve relay.

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

      A01MGBEC02
      *A for LHD *B for RHD
      *1 Tank Shut Valve Relay Holder - -
      *a

      Front view of wire harness connector

      (to No. 2 Hydrogen Tank Assembly (Tank Shut Valve 2))

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      R3-4 (TVR2) - G95-5 (Tank shut valve relay holder) Always Below 1 Ω
      R3-4 (TVR2) or G95-5 (Tank shut valve relay holder) - Body ground and other terminals Always 10 kΩ or higher

    6. Reinstall the tank shut valve relay.

    7. Reconnect the P30 hydrogen fuel control ECU assembly connector.

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

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

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK HARNESS AND CONNECTOR (HYDROGEN FUEL CONTROL ECU ASSEMBLY - TANK SHUT VALVE RELAY)


    1. A01MJ4S

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

    2. A01MIKD

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

    3. Disconnect the hydrogen fuel control ECU assembly connector.

    4. Remove the tank shut valve relay.

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

      A01MFSIC01
      *A for LHD *B for RHD
      *1 Tank Shut Valve Relay Holder - -
      *a

      Front view of wire harness connector

      (to Hydrogen Fuel Control ECU Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      P30-5 (+BP) - G95-5 (Tank shut valve relay holder) Always Below 1 Ω
      P30-5 (+BP) or G95-5 (Tank shut valve relay holder) - Body ground and other terminals Always 10 kΩ or higher

    6. Reinstall the tank shut valve relay.

    7. Reconnect the hydrogen fuel control ECU assembly connector.

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

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

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. INSPECT RELAY (TANK SHUT VALVE RELAY)

    Click here

    Result
    Proceed to
    OK
    NG

    NG

    REPLACE RELAY (TANK SHUT VALVE RELAY)

    OK

  13. CHECK TERMINAL VOLTAGE (POWER SOURCE OF TANK SHUT VALVE RELAY)


    1. Remove the tank shut valve relay.

      A01MFJ6C01
      *A for LHD *B for RHD
      *1 Tank Shut Valve Relay Holder - -

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G95-3 (Tank shut valve relay holder) - Body ground Power switch off 11 to 14 V

    3. Reinstall the tank shut valve relay.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TANK SHUT VALVE RELAY - AUXILIARY BATTERY)

    OK

  14. CHECK HARNESS AND CONNECTOR (TANK SHUT VALVE RELAY - BODY GROUND)


    1. Remove the tank shut valve relay.

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

      A01MFJ6C01
      *1 for LHD *2 for RHD
      *3 Tank Shut Valve Relay Holder - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      G95-2 (Tank shut valve relay holder) - Body ground Always Below 1 Ω

    3. Reinstall the tank shut valve relay.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. CHECK TERMINAL VOLTAGE (POWER SOURCE OF TANK SHUT VALVE RELAY)


    1. Remove the tank shut valve relay.

      A01MFJ6C01
      *1 for LHD *2 for RHD
      *3 Tank Shut Valve Relay Holder - -

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G95-1 (Tank shut valve relay holder) - Body ground Power switch on (IG) 11 to 14 V

    4. Turn the power switch off.

    5. Reinstall the tank shut valve relay.

      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  16. CHECK HARNESS AND CONNECTOR (EV CONTROL ECU - TANK SHUT VALVE RELAY)


    1. Disconnect the EV control ECU connector.

    2. Remove the tank shut valve relay.

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

      A01MH9RC01
      *A for LHD *B for RHD
      *1 Tank Shut Valve Relay Holder - -
      *a

      Rear view of wire harness connector

      (to EV Control ECU)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      G45-3 (RLTN) - G95-1 (Tank shut valve relay holder) Always Below 1 Ω
      G45-3 (RLTN) or G95-1 (Tank shut valve relay holder) - Body ground and other terminals Always 10 kΩ or higher

    4. Reinstall the tank shut valve relay.

    5. Reconnect the EV control ECU connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE EV CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR