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HYBRID CONTROL SYSTEM, Diagnostic DTC:P314A-828

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DTC Code DTC Name
P314A-828 Inverter Coolant Pump Speed Signal
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DESCRIPTION

Refer to the description for DTC P0C73-776 (Click here).

DTC No. INF Code DTC Detection Condition Trouble Area
P314A 828

The inverter water pump speed signal is not sent to the power management control ECU when the power switch is turned on (READY).*1

(1 trip detection logic)

  • Wire harness or connector

  • Power management control ECU

  • Inverter water pump assembly

  • INV W/PMP fuse

  • INV W/PMP RLY fuse

  • INV W/PMP relay

Table 1. Related Data List
DTC No. Data List Item
P314A-828

  • Inverter W/P Revolution

  • W/P Run Control Duty*2

  • Ready Signal

*2: This Data List item is related to the inverter water pump assembly.

Table 2. Related Active Test
DTC No. Active Test
P314A-828 Activate the Water Pump*3

*3: This Active Test item is related to the inverter water pump assembly.

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WIRING DIAGRAM

Refer to the wiring diagram for DTC P0C73-776 (Click here).

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CAUTION / NOTICE / HINT

Note:

If DTC P0A78-284, 286, P0A7A-322, 324, P0A94-553 or 557 is output, replace the inverter with converter assembly after this inspection.

Tip:

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) and wait for 2 minutes or more.

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PROCEDURE


  1. Click here

    CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

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

    5. Clear the DTCs and freeze frame data.

    6. Turn the power switch off.


  2. Click here

    PERFORM ACTIVE TEST USING GTS (ACTIVATE THE WATER PUMP)

    Note:

    Be sure to perform the inspection with the auxiliary battery voltage at 11 V or more.

    Tip:

    When the auxiliary battery voltage is low, the inverter water pump assembly may not operate.


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump.

    4. Perform the Activate the Water Pump Active Test.

    5. Touch the inverter water pump assembly and check that it is operating (vibrating).

      OK
      The inverter water pump is operating (vibrating).

    6. Turn the power switch off.


  3. Click here

    CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)


    1. A0009DG

      Check the connector connections and contact pressure of the relevant terminals for the power management control ECU connectors (Click here).

      OK
      The connectors are connected securely and there are no contact pressure problems.

  4. Click here

    CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR)


    1. B001VI2

      Check the connector connections and contact pressure of the relevant terminals for the inverter water pump assembly connector (Click here).

      OK
      The connectors are connected securely and there are no contact pressure problems.

  5. Click here

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INVERTER WATER PUMP ASSEMBLY)


    1. Disconnect the A31 power management control ECU connector.

    2. Disconnect the A41 inverter water pump assembly connector.

    3. A0008FRE03

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

      Table 3. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      		 *b

      Front view of wire harness connector

      (to Inverter Water Pump Assembly)
      Standard Resistance
      Tester Connection Condition Specified Condition
      A31-14 (NIWP) - A41-2 (NWP) Power switch off Below 1 Ω
      A31-14 (NIWP) or A41-2 (NWP) -Body ground and other terminals Power switch off 10 kΩ or higher

    4. Reconnect the A31 power management control ECU connector.

    5. Reconnect the A41 inverter water pump assembly connector.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. Click here

    CHECK POWER MANAGEMENT CONTROL ECU


    1. Disconnect the A41 inverter water pump assembly connector.

    2. Turn the power switch on (IG).

    3. A0007JIE03

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A31-14 (NIWP) - H1-6 (E1) Power switch on (IG) 11 to 14 V
      Table 4. Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

    4. Turn the power switch off.

    5. Reconnect the A41 inverter water pump assembly connector.


  7. Click here

    CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

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

    5. Clear the DTCs and freeze frame data.

    6. Turn the power switch off.


  8. Click here

    PERFORM ACTIVE TEST USING GTS (ACTIVATE THE WATER PUMP)

    Note:

    Be sure to perform the inspection with the auxiliary battery voltage at 11 V or more.

    Tip:

    When the auxiliary battery voltage is low, the inverter water pump assembly may not operate.


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump.

    4. Perform the "Activate the Water Pump" Active Test.

    5. A00071UE03

      Connect an oscilloscope between the power management control ECU terminals specified in the table below, and measure the waveform.

      Item Content
      Terminal A31-14 (NIWP) - H1-6 (E1)
      Equipment Setting 5 V/DIV., 100 ms./DIV.
      Condition Power switch on (IG), during Active Test
      OK
      The duration of wavelength A is 300 msec or less.
      Table 5. Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

    6. Turn the power switch off.


    • OK

      REPLACE POWER MANAGEMENT CONTROL ECU (Click here)

    • NG

      REPLACE INVERTER WATER PUMP ASSEMBLY (Click here)

  9. Click here

    CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR)


    1. B001VI2

      Check the connector connections and contact pressure of the relevant terminals for the inverter water pump assembly connector (Click here).

      OK
      The connectors are connected securely and there are no contact pressure problems.

  10. Click here

    CHECK INSTALLATION CONDITION (INV W/PMP RELAY)


    1. A0006CSE02

      Check installation condition of the INV W/PMP relay.

      Table 6. Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Relay
      OK
      INV W/PMP relay is installed correctly.

  11. Click here

    CHECK HARNESS AND CONNECTOR (IGCT RELAY - INV W/PMP RELAY)


    1. Remove the INV W/PMP relay and IGCT relay from the No. 2 engine room relay block.

    2. A0003SQE02
      A0006SJE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (INV W/PMP RLY) - 5 (IGCT relay) Power switch off Below 1 Ω
      Table 7. Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Relay
      *3 IGCT Relay
      Note:

      Do not apply excessive force when using the probes of the tester to perform the inspection. If excessive force is used, the terminals will be damaged.

      Tip:

      • Connectors

        Slightly shake the connector vertically and horizontally.

      • Wire Harness

        Slightly shake the wire harness vertically and horizontally.

        The connector joint and fulcrum of the vibration are the major areas that should be checked thoroughly.

      • No. 2 Engine Room Relay Block

        Apply slight vibration with a finger to the No. 2 engine room relay block and check whether a malfunction occurs.

      • INV W/PMP RLY Fuse

        Apply slight vibration with a finger to the INV W/PMP RLY fuse and check whether a malfunction occurs.

      Table 8. Text in Illustration
      *a Example
      *b Shake Slightly
      *c Vibrate Slightly

    3. Install the INV W/PMP relay and IGCT relay.


  12. Click here

    INSPECT RELAY (INV W/PMP)


    1. Remove the INV W/PMP relay from the No. 2 engine room relay block.

    2. A00050SE37

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage is not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage is applied between terminals 1 and 2 Below 1Ω
      Table 9. Text in Illustration
      *1 INV W/PMP Relay

    3. Install the INV W/PMP relay.


  13. Click here

    CHECK HARNESS AND CONNECTOR (INVERTER WATER PUMP ASSEMBLY - BODY GROUND)


    1. Disconnect the A41 inverter water pump assembly connector.

    2. A0003SQE02
      A00098ZE03

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A41-4 (+BWP) - Body ground Power switch on (IG) 11 to 14 V
      Table 10. Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter Water Pump Assembly)
      Note:

      • Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

      • Do not apply excessive force when using the probes of the tester to perform the inspection. If excessive force is used, the terminals will be damaged.

      Tip:

      • Connectors

        Slightly shake the connector vertically and horizontally.

      • Wire Harness

        Slightly shake the wire harness vertically and horizontally.

        The connector joint and fulcrum of the vibration are the major areas that should be checked thoroughly.

      • No. 2 Engine Room Relay Block

        Apply slight vibration with a finger to the No. 2 engine room relay block and check whether a malfunction occurs.

      • INV W/PMP Fuse

        Apply slight vibration with a finger to the INV W/PMP fuse and check whether a malfunction occurs.

      • INV W/PMP relay

        Apply slight vibration with a finger to the INV W/PMP relay and check whether a malfunction occurs.

      Table 11. Text in Illustration
      *a Example
      *b Shake Slightly
      *c Vibrate Slightly

    3. Reconnect the A41 inverter water pump assembly connector.


  14. Click here

    CHECK HARNESS AND CONNECTOR (INVERTER WATER PUMP ASSEMBLY - BODY GROUND)


    1. Disconnect the A41 inverter water pump assembly connector.

    2. A0005HHE03

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A41-1 (GND) - Body ground Power switch off Below 1 Ω
      Table 12. Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter Water Pump Assembly)

    3. Reconnect the A41 inverter water pump assembly connector.


    • OK

      REPLACE INVERTER WATER PUMP ASSEMBLY (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  15. Click here

    CHECK INSTALLATION CONDITION (INV W/P FUSE)


    1. A0003ULE02

      Check installation condition of the INV W/PMP fuse.

      Table 13. Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Fuse
      OK
      INV W/PMP fuse is installed correctly.

  16. Click here

    INSPECT RELAY (INV W/PMP)


    1. Remove the INV W/PMP relay from the No. 2 engine room relay block.

    2. A00050SE37

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage is not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage is applied between terminals 1 and 2 Below 1Ω
      Table 14. Text in Illustration
      *1 INV W/PMP Relay

    3. Install the INV W/PMP relay.


  17. Click here

    CHECK HARNESS AND CONNECTOR (INVERTER WATER PUMP ASSEMBLY - NO. 2 ENGINE ROOM RELAY BLOCK)


    1. Remove the INV W/PMP relay from the No. 2 engine room relay block.

    2. Disconnect the A41 inverter water pump assembly connector.

    3. A00067VE03

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

      Table 15. Text in Illustration
      *1 No. 2 Engine Room Relay Block *2 INV W/PMP Relay
      *a

      Front view of wire harness connector

      (to Inverter Water Pump Assembly)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      A41-4 (+BWP) - 3 (INV W/PMP relay) Power switch off Below 1 Ω
      A41-4 (+BWP) or 3 (INV W/PMP relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      Note:

      Do not apply excessive force when using the probes of the tester to perform the inspection. If excessive force is used, the terminals will be damaged.

    4. Install the INV W/PMP relay.

    5. Reconnect the A41 inverter water pump assembly connector.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  18. Click here

    CHECK FUSE (INV W/PMP)


    1. Remove the INV W/PMP fuse from the No. 2 engine room relay block.

    2. A0003ULE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      INV W/PMP fuse Always Below 1 Ω
      Table 16. Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Fuse

    3. Install the INV W/PMP fuse.


    • OK

      REPAIR OR REPLACE HARNESS OR CONNECTOR (INV W/PMP FUSE HOLDER TERMINAL OR INV W/PMP RELAY HOLDER TERMINAL)

    • NGClick here
  19. Click here

    REPLACE INVERTER WATER PUMP ASSEMBLY

    (Click here)


    • NEXT

      REPLACE FUSE (INV W/PMP)

  20. Click here

    CHECK RELAY HOLDER TERMINAL (INV W/PMP RELAY)


    1. Check the terminals of the INV W/PMP relay holder.

      OK
      The terminals of the INV W/PMP relay holder are not bent, loose or corroded.

  21. Click here

    CHECK FUSE (INV W/PMP RLY)


    1. Remove the INV W/PMP RLY fuse from the No. 2 engine room relay block.

    2. A00045OE01

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

      Table 17. Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP RLY Fuse
      Standard Resistance
      Tester Connection Condition Specified Condition
      INV W/PMP RLY fuse Always Below 1 Ω

    3. Install the INV W/PMP RLY fuse.


  22. Click here

    REPLACE RELAY (INV W/PMP)


    • NEXT

      REPLACE FUSE (INV W/PMP RLY)

  23. Click here

    CHECK RELAY HOLDER TERMINAL (INV W/PMP RELAY)


    1. Check the terminals of the INV W/PMP relay holder.

      OK
      The terminals of the INV W/PMP relay holder are not bent, loose or corroded.

  24. Click here

    CHECK FUSE (INV W/PMP RLY)


    1. Remove the INV W/PMP RLY fuse from the No. 2 engine room relay block.

    2. A00045OE01

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

      Table 18. Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP RLY Fuse
      Standard Resistance
      Tester Connection Condition Specified Condition
      INV W/PMP RLY fuse Always Below 1 Ω

    3. Install the INV W/PMP RLY fuse.


  25. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INV W/PMP RELAY HOLDER TERMINAL)


    • NEXT

      REPLACE RELAY (INV W/PMP)

  26. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INV W/PMP RELAY HOLDER TERMINAL)


    • NEXT

      REPLACE RELAY (INV W/PMP)

  27. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INV W/PMP RELAY HOLDER TERMINAL)


  28. Click here

    REPLACE FUSE (INV W/PMP RLY)


    • NEXT

      REPLACE FUSE (INV W/PMP)

  29. Click here

    CHECK INSTALLATION CONDITION (INV W/PMP RLY)


    1. A00045OE01

      Check installation condition of the INV W/PMP RLY fuse.

      Table 19. Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP RLY Fuse
      OK
      INV W/PMP RLY fuse is installed correctly.

  30. Click here

    CHECK FUSE (INV W/PMP RLY)


    1. A00045OE01

      Remove the INV W/PMP RLY fuse from the No. 2 engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      INV W/PMP RLY fuse Always Below 1Ω
      Table 20. Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP RLY Fuse

    3. Install the INV W/PMP RLY fuse.


    • OK

      REPAIR OR REPLACE HARNESS OR CONNECTOR (INV W/PMP RLY FUSE HOLDER TERMINAL)

    • NGClick here
  31. Click here

    CHECK FUSE HOLDER TERMINAL (INV W/PMP RLY)


    1. Check the terminals of the INV W/PMP RLY fuse holder.

      OK
      The terminals of the INV W/PMP RLY fuse holder are not bent, loose or corroded.

  32. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INV W/PMP RLY HOLDER TERMINAL)


    • NEXT

      REPLACE FUSE (INV W/PMP RLY)

  33. Click here

    INSPECT RELAY (INV W/PMP)


    1. Remove the INV W/PMP relay from the No. 2 engine room relay block.

    2. A00050SE37

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage is not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage is applied between terminals 1 and 2 Below 1Ω
      Table 21. Text in Illustration
      *1 INV W/PMP Relay

    3. Install the INV W/PMP relay.


    • OK

      CONNECT SECURELY (INV W/PMP RLY FUSE)

    • NGClick here
  34. Click here

    INSPECT RELAY (INV W/PMP)


    1. Remove the INV W/PMP relay from the No. 2 engine room relay block.

    2. A00050SE37

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage is not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage is applied between terminals 1 and 2 Below 1Ω
      Table 22. Text in Illustration
      *1 INV W/PMP Relay

    3. Install the INV W/PMP relay.


    • OK

      CONNECT SECURELY (INV W/PMP RELAY)

    • NGClick here
  35. Click here

    REPLACE RELAY (INV W/PMP)


    • NEXT

      CONNECT SECURELY (INV W/PMP RLY FUSE)

  36. Click here

    REPLACE RELAY (INV W/PMP)


    • NEXT

      CONNECT SECURELY (INV W/PMP RELAY)