HYBRID CONTROL SYSTEM, Diagnostic DTC:P1E15-450, P1E17-450

DTC Code DTC Name
P1E15-450 FC Stack Positive Relay Stuck Closed
P1E17-450 FC Stack Negative Relay Stuck Closed

DTC SUMMARY


  1. MALFUNCTION DESCRIPTION

    The EV control ECU compares the FC converter voltage before boosting (FVL) and the FC stack voltage (VFC), at the time an FC relay open command is output, and determines whether any high-voltage relays (FC relays) built inside the FC stack assembly is stuck.

    The cause of this malfunction may be one of the following:


      FC converter assembly built in voltage pressure sensor (FVL) system malfunction

    • Voltage sensor (FVL) malfunction

    • FC boost control ECU malfunction


      High voltage system malfunction

    • FC stack assembly (FC relay) malfunction


      FC relay low voltage (excitation line) system malfunction

    • FC boost control ECU malfunction

DESCRIPTION

The FC relay connects and disconnects the high-voltage FC stack circuit.

The FC relays are provided each on the positive (+) terminal (FCB) and negative (-) terminal (FCG) of the high-voltage circuit inside the FC stack assembly, and the relays operate on the excitation signal which is sent from the FC boost control ECU. The excitation signal is output when the FC boost control ECU receives a request from the EV control ECU.

The EV control ECU compares the FC converter voltage before boosting (FVL) and the FC stack voltage (VFC) under the following power switch operation conditions and determines whether the circuit is stuck or malfunctioning.


For high voltage wiring diagrams, refer to the system description.

Click here

B000ZIQE02
DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P1E15-450 FC Stack Positive Relay Stuck Closed

FC relay on positive (+) terminal (FCB) is stuck.


  • The FC converter voltage before boosting (FVL) and FC stack voltage (VFC) are the same when the power switch was turned off (not on READY) and a command signal to open the FC relay on positive (+) terminal and close the FC relay on negative (-) terminal is output.

FC relays on positive (+) terminal (FCB) and negative (-) terminal (FCG) are both stuck.


  • The inverter voltage after boosting (VH) and FC converter voltage after boosting (FVH) are both high and the EV battery current does not flow when the power switch is turned on (IG) (not on READY).

(1 trip detection logic)

  • FC stack assembly

  • FC converter assembly

Master Warning Light:

Comes on
P1E17-450 FC Stack Negative Relay Stuck Closed

FC relay on positive (-) terminal (FCG) is stuck.


  • The FC converter voltage before boosting (FVL) and FC stack voltage (VFC) are the same when a command signal to open the FC relay on negative (-) terminal and close the FC relay on positive (+) terminal is output.

(1 trip detection logic)

  • FC stack assembly

  • FC converter assembly

Master Warning Light:

Comes on
Related Data List
DTC No. System Data List

P1E15-450

P1E17-450

 EV

  • FC Converter Input Voltage

  • VH-Voltage after Boosting

  • FC Current
FC FC Total Voltage

WIRING DIAGRAM

Refer to the wiring diagram for the EV Battery High-Voltage Line Circuit.

Click here

CAUTION / NOTICE / HINT

CAUTION:


  • B006JFB
    B006JM4

    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.


    • Inspecting the high-voltage system

    • Disconnecting the low voltage connector of the inverter with converter assembly

    • Disconnecting the low voltage connector of the EV battery

    • Disconnecting the low voltage connector of the FC stack assembly

    • 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.

  • B006JBZ

    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.

  • B000ZMTC04
    *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.

    Click here

    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


  • 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 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.

    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


  • DTC P1E15-450 is output, and when the following malfunction condition is met, the power switch will not be able to be turned on (READY).


    • The FC relays on both terminals are detected to be stuck.

  • 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 30 seconds.

    3. Turn the power switch on (READY) and wait for 30 seconds or more.

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

PROCEDURE


  1. CHECK DTC OUTPUT (EV)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / EV / Trouble Codes.

    4. Check for DTCs.


      Powertrain > EV > Trouble Codes
      Result
      Result Proceed to
      P1E15-450 is output. A
      P1E17-450 is output. B

    5. Turn the power switch off.


    B

    CHECK DTC OUTPUT (EV) Click here

    A

  2. CHECK DTC OUTPUT (EV)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / EV / Trouble Codes.

    4. Check for DTCs.


      Powertrain > EV > Trouble Codes
      Result
      Result Proceed to
      P1E15-450 only is output, or DTCs except the ones in the tables below are also output. A
      Any of the following DTCs including pending DTCs are also output. B
      Malfunction Content Relevant DTC
      Microcomputer malfunction P0A1B-163, 164, 168, 193, 511, 512, 661, 786, 794, 795, 796 Drive Motor "A" Control Module
      P0A1D-148 EV Control Module
      P1D8F-474, 475, 476, 477, 479, 481, 482, 483, 484 FC Air Compressor Motor "A" Control Module
      P324E-788 Motor CPU Power Relay Sense Circuit Intermittent No Continuity
      Power source circuit malfunction P2511-149 EV CPU Power Relay Sense Circuit Intermittent No Continuity
      Communication system malfunction U0110 (all INF codes)*1 Lost Communication with Drive Motor Control Module "A"
      U1160-450 Lost Communication with FCDC System
      U1161-450 Lost Communication with FC System
      Sensor and actuator circuit malfunction P0A3F-243 Drive Motor "A" Position Sensor Circuit
      P0A40-500 Drive Motor "A" Position Sensor Circuit Range/Performance
      P0A41-245 Drive Motor "A" Position Sensor Circuit Low
      P0ADC-226 Battery Positive Contactor Control Circuit High
      P0AE0-450 Battery Negative Contactor Control Circuit High
      P0AE7-450 Battery Precharge Contactor Control Circuit High
      P0AA1-233 Battery Positive Contactor Circuit Stuck Closed
      P1D75-450 FC Air Compressor Motor "A" Position Sensor Circuit
      P1D76-450 FC Air Compressor Motor "A" Position Sensor Circuit Range/Performance
      P1D77-450 FC Air Compressor Motor "A" Position Sensor Circuit Low
      P0A78-266, 267, 586 Drive Motor "A" Inverter Performance
      P0A94-442, 585 Boosting Converter Performance
      P0C76-523 EV Battery System Discharge Time Too Long
      System malfunction P3004-132 High Voltage Power Resource
      P0AA6-458, 486, 487, 488, 526, 611, 612, 613, 614 EV Battery Voltage System Isolation Fault

      Tech Tips


      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.

      • P1E15-450 may be output as a result of the malfunction indicated by the DTCs above.


        1. The chart above is listed in inspection order of priority.

        2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)

    5. Turn the power switch off.


    A

    GO TO STEP 4 Click here

    B

    GO TO DTC CHART (EV CONTROL SYSTEM)

  3. CHECK DTC OUTPUT (EV)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / EV / Trouble Codes.

    4. Check for DTCs.


      Powertrain > EV > Trouble Codes
      Result
      Result Proceed to
      P1E17-450 only is output, or DTCs except the ones in the tables below are also output. A
      Any of the following DTCs including pending DTCs are also output. B
      Malfunction Content Relevant DTC
      Microcomputer malfunction P0A1B-163, 164, 168, 193, 511, 512, 661, 786, 794, 795, 796 Drive Motor "A" Control Module
      P0A1D-148 EV Control Module
      P1D8F-474, 475, 476, 477, 479, 481, 482, 483, 484 FC Air Compressor Motor "A" Control Module
      P324E-788 Motor CPU Power Relay Sense Circuit Intermittent No Continuity
      Power source circuit malfunction P2511-149 EV CPU Power Relay Sense Circuit Intermittent No Continuity
      Communication system malfunction U0110 (all INF codes)*1 Lost Communication with Drive Motor Control Module "A"
      U1160-450 Lost Communication with FCDC System
      U1161-450 Lost Communication with FC System
      Sensor and actuator circuit malfunction P0A3F-243 Drive Motor "A" Position Sensor Circuit
      P0A40-500 Drive Motor "A" Position Sensor Circuit Range/Performance
      P0A41-245 Drive Motor "A" Position Sensor Circuit Low
      P1D75-450 FC Air Compressor Motor "A" Position Sensor Circuit
      P1D76-450 FC Air Compressor Motor "A" Position Sensor Circuit Range/Performance
      P1D77-450 FC Air Compressor Motor "A" Position Sensor Circuit Low
      P0A78-266, 267, 586 Drive Motor "A" Inverter Performance
      P0A94-442, 585 Boosting Converter Performance
      P0C76-523 EV Battery System Discharge Time Too Long
      System malfunction P3004-132 High Voltage Power Resource
      P0AA6-458, 486, 487, 488, 526, 611, 612, 613, 614 EV Battery Voltage System Isolation Fault

      Tech Tips


      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.

      • P1E17-450 may be output as a result of the malfunction indicated by the DTCs above.


        1. The chart above is listed in inspection order of priority.

        2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    A

  4. CHECK DTC OUTPUT (FCDC)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / FCDC / Trouble Codes.

    4. Check for DTCs.


      Powertrain > FCDC > Trouble Codes
      Result
      Result Proceed to
      None of the following DTCs are output. A
      Any of the following DTCs are also output. B
      Malfunction Content Relevant DTC
      Sensor and actuator circuit malfunction P1D0E-450 FVH (FC Converter Output Voltage)/VH Voltage Correlation
      P1D0F-450 FVC (Cell Monitor Voltage)/FVL (FC Converter Input Voltage) Correlation
      P1D1D-450 FVH (FC Converter Output Voltage)/Over Voltage

      Tech Tips

      P1E15-450 and P1E17-450 may be output as a result of the malfunction indicated by the DTCs above.

    5. Turn the power switch off.


    B

    GO TO DTC CHART (FC BOOST CONTROL SYSTEM) Click here

    A

  5. CHECK DTC OUTPUT (FC)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / FC / Trouble Codes.

    4. Check for DTCs.


      Powertrain > FC > Trouble Codes
      Result
      Result Proceed to
      None of the following DTCs are output. A
      Any of the following DTCs are also output. B
      Malfunction Content Relevant DTC
      Sensor and actuator circuit malfunction P1D5F-450 Lost Communication with Cell Monitor
      P1DCF-450 Cell Monitor Performance

      Tech Tips

      P1E15-450 and P1E17-450 may be output as a result of the malfunction indicated by the DTCs above.

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


    B

    GO TO DTC CHART (FC CONTROL SYSTEM) Click here

    A

  6. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / EV / Trouble Codes.

    4. Read and record the DTCs and freeze frame data.


      Powertrain > EV > Trouble Codes

    5. Clear the DTCs and freeze frame data.


      Powertrain > EV > Clear DTCs

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

      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK DTC OUTPUT (EV)


    1. Connect the GTS to the DLC3.

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

    3. Turn the power switch on (IG) and wait for 30 seconds or more.

    4. Turn the power switch on (READY) and wait for 30 seconds or more.

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

    6. Turn the power switch on (IG).

    7. Enter the following menus: Powertrain / EV / Trouble Codes.

    8. Check for DTCs.


      Powertrain > EV > Trouble Codes
      Result
      Result Proceed to
      P1E15-450 or P1E17-450 is output again. A
      Neither P1E15-450 or P1E17-450 is output again. B

    9. Turn the power switch off.


    A

    REPLACE FC STACK ASSEMBLY Click here

    B

    CHECK INTERMITTENT PROBLEMS