FC BOOST CONTROL SYSTEM, Diagnostic DTC:P1D46-450, P1D4B-450, P1D51-450, P1D56-450
| DTC Code | DTC Name |
|---|---|
| P1D46-450 | U Phase IGBT Temperature Sensor Correlation |
| P1D4B-450 | V Phase IGBT Temperature Sensor Correlation |
| P1D51-450 | W Phase IGBT Temperature Sensor Correlation |
| P1D56-450 | X Phase IGBT Temperature Sensor Correlation |
DESCRIPTION
The FC boost control ECU is located inside the FC converter assembly. It monitors the temperature of the FC converter assembly using the FC converter temperature sensor and performs control to prevent overheating of the FC converter assembly. The FC boost control ECU detects abnormal characteristics of the FC converter temperature sensor based on the temperature sensor values sent from the FC converter temperature sensor. It also detects malfunctions in the FC converter temperature sensor wirings.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate |
|---|---|---|---|---|
| P1D46-450 | U Phase IGBT Temperature Sensor Correlation | The FC converter U phase temperature is high and the difference between the estimated U phase coolant temperature and the final estimated coolant temperature is larger than specified for 10 seconds or more. (1 trip detection logic) |
|
Master Warning Light: Comes on |
| P1D4B-450 | V Phase IGBT Temperature Sensor Correlation | The FC converter V phase temperature is high and the difference between the estimated V phase coolant temperature and the final estimated coolant temperature is larger than specified for 10 seconds or more. (1 trip detection logic) |
|
Master Warning Light: Comes on |
| P1D51-450 | W Phase IGBT Temperature Sensor Correlation | The FC converter W phase temperature is high and the difference between the estimated W phase coolant temperature and the final estimated coolant temperature is larger than specified for 10 seconds or more. (1 trip detection logic) |
|
Master Warning Light: Comes on |
| P1D56-450 | X Phase IGBT Temperature Sensor Correlation | The FC converter X phase temperature is high and the difference between the estimated X phase coolant temperature and the final estimated coolant temperature is larger than specified for 10 seconds or more. (1 trip detection logic) |
|
Master Warning Light: Comes on |
| DTC No. | Data List |
|---|---|
| P1D46-450 |
|
| P1D4B-450 |
|
| P1D51-450 |
|
| P1D56-450 |
|
Tech Tips
These DTCs will be stored when the FC converter temperature sensor value becomes abnormal.
CAUTION / NOTICE / HINT
CAUTION:
-
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.
-
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.
-
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.
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 (READY) and wait for 90 seconds or more.
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Drive the vehicle for approximately 10 minutes referring to the following freeze frame data or Data List items: "Vehicle Speed".
PROCEDURE
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CHECK DTC OUTPUT (EV)
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Connect the GTS to the DLC3.
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Turn the power switch on (IG).
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Turn the GTS on.
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Enter the following menus: Powertrain / EV / Trouble Codes.
Powertrain > EV > Trouble Codes -
Check for DTCs.
Result Result Proceed to "EV related DTCs are not output" or "DTCs except the ones in the table below are output" A Any of the following DTCs are output B Malfunction Content Relevant DTC Sensor and actuator circuit malfunction P0A93-346 Inverter Cooling System Performance P0C73-776 Motor Electronics Coolant Pump "A" Control Performance P314A-828 Inverter Coolant Pump Speed Signal Tech Tips
DTC P1D46-450, P1D4B-450, P1D51-450 or P1D56-450 may be output as a result of the malfunction indicated by the DTCs above.
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Turn the power switch off.
B 
GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here
A 
-
-
CHECK CONNECTOR CONNECTION CONDITION (FC CONVERTER ASSEMBLY 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 CAUTION:
Be sure to wear insulated gloves.
-
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.
-
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
-
-
CHECK COOLING SYSTEM
Tech Tips
If the "Cooling System" inspection results are normal, perform the next step.
Result Proceed to NEXT
NEXT
REPLACE FC CONVERTER ASSEMBLY Click here