FC BOOST CONTROL SYSTEM, Diagnostic DTC:P0560-117
| DTC Code | DTC Name |
|---|---|
| P0560-117 | System Voltage |
DESCRIPTION
Battery power is constantly supplied to the backup power terminal of the FC boost control ECU to store DTCs and freeze frame data. Back up power is continually supplied after the power switch is turned off.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate |
|---|---|---|---|---|
| P0560-117 | System Voltage | The BATT terminal voltage remains less than 3.5 V for 3 seconds or more. (1 trip detection logic) |
|
Master Warning Light: Comes on |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
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Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grips from both FC stack assembly and EV battery.
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Inspecting the high-voltage system
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Disconnecting the low voltage connector of the inverter with converter assembly
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Disconnecting the low voltage connector of the EV battery
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Disconnecting the low voltage connector of the FC stack assembly
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Disconnecting the low voltage connector of the FC converter assembly
Tech Tips
No removal order is specified for the service plug grips of the FC stack assembly and EV battery.
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After removing the service plug grip from the EV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After removing the service grip from the FC stack assembly, store it in a safe location and use the "HIGH-VOLTAGE, DO NOT TOUCH" sign to notify other technicians that you are working on the high-voltage system.
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*a Without waiting for 10 minutes After removal of the service plug grips of both FC stack assembly and EV battery, wait for at least 10 minutes before touching the high-voltage connectors and terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
Tech Tips
At least 10 minutes are necessary to discharge the high-voltage capacitors inside the inverter with converter assembly and FC stack assembly.
Note
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When reinstalling the service plug grip to the FC stack assembly or the EV battery, slide the lever of the service plug until the letters "UNLOCK" are completely hidden, and insert it firmly.
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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).
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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.
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Inspect the fuses for circuits related to this system before performing the following procedure.
Tech Tips
After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
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Turn the power switch on (IG) and wait for 3 seconds or more.
PROCEDURE
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CHECK CONNECTOR CONNECTION CONDITION (FC CONVERTER ASSEMBLY CONNECTOR)
CAUTION:
Be sure to wear insulated gloves.
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Check that the service plug grip is not installed to FC stack assembly and EV battery.
Note
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
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Check the connection condition of the FC converter assembly connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.
Note
Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.
OK - The connector is connected securely. - The terminals are not deformed and are connected securely. - No water or foreign matter in the connector. Result Result Proceed to OK A NG (The connector is not connected securely) B NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector) C
B 
CONNECT SECURELY
C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A 
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CHECK CABLE FROM AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM)
Result Proceed to OK NG
NG
CONNECT SECURELY
OK
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CHECK AUXILIARY BATTERY
Result Proceed to OK NG
NG
CHARGE OR REPLACE AUXILIARY BATTERY
OK
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CHECK HARNESS AND CONNECTOR (FC CONVERTER ASSEMBLY - AUXILIARY BATTERY)
CAUTION:
Be sure to wear insulated gloves.
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Check that the service plug grip is not installed to FC stack assembly and EV battery.
Note
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
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Disconnect the cable from the negative (+) auxiliary battery terminal.
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Disconnect the Ao2 FC converter assembly connector.
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*a Front view of wire harness connector
(to FC Converter Assembly)
Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Switch Condition Specified Condition Ao2-9 (BATT) - Auxiliary battery positive (+) cable Power switch off Below 1 Ω Ao2-9 (BATT) or Auxiliary battery positive (+) cable - Body ground Power switch off 10 kΩ or higher -
Connect the FC converter assembly connector.
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Connect the cable from the negative (+) auxiliary battery terminal.
Result Proceed to OK NG
OK
REPLACE FC CONVERTER ASSEMBLY Click here
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
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