FC CONTROL SYSTEM, Diagnostic DTC:P0560-117

DTC Code DTC Name
P0560-117 System Voltage

DESCRIPTION

The auxiliary battery supplies electricity to the FC control ECU even when the power switch is off. This power allow the FC control ECU to store data such as DTC history, freeze frame data. If the auxiliary battery voltage falls below a minimum level, the memory is cleared and the FC control ECU determines that there is a malfunction in the power supply circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P0560-117 System Voltage

The BATT voltage of the FC control ECU remains at less than 3.5 V for more than 3 seconds.

(1 trip detection logic)

  • FC control ECU

  • Auxiliary battery

  • Auxiliary battery terminals

  • Wire harness or connector

 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 travelling)

 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 ○ ○ ○ ○ ○ -

WIRING DIAGRAM

A01MHOBE02
*a MAIN
*b Auxiliary Battery
*c FC Control ECU

CAUTION / NOTICE / HINT

Note


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

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Click here

  • 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 and wait for 3 minutes or more.

  2. Turn the power switch on (IG) and wait for 3 seconds or more.

PROCEDURE


  1. INSPECT AUXILIARY BATTERY

    Click here

    OK
    Auxiliary battery is not depleted
    Result
    Proceed to
    OK
    NG

    NG

    CHARGE OR REPLACE AUXILIARY BATTERY

    OK

  2. CHECK AUXILIARY BATTERY TERMINAL

    Click here

    OK
    Auxiliary battery terminals are not loose or corroded.
    Result
    Proceed to
    OK
    NG

    NG

    REPAIR OR REPLACE AUXILIARY BATTERY TERMINAL

    OK

  3. CHECK HARNESS AND CONNECTOR (FC CONTROL ECU - BODY GROUND)


    1. A01MJCWC01
      *a

      Front view of wire harness connector

      (to FC Control ECU)

      Disconnect the FC control ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A48-23 (BATT) - Body ground Power switch off 11 to 14 V

    3. Reconnect the FC control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. 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

  5. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG) and wait for 3 seconds or more.

    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 P0560-117 is output A
      DTCs are not output B

    6. Turn the power switch off.


    A

    REPLACE FC CONTROL ECU Click here

    B

    CHECK FOR INTERMITTENT PROBLEMS