HYBRID CONTROL SYSTEM, Diagnostic DTC:P314A-828

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

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

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.

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.

WIRING DIAGRAM

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

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.

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 on (READY) and wait for 2 minutes or more.

PROCEDURE


  1. 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.


    NEXT

  2. 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.

    Tech Tips

    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.


    NG

    CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR) Click here

    OK

  3. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)


    1. A0005OEE01
      Text in Illustration
      *A for LHD
      *B for RHD

      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.

    NG

    CONNECT SECURELY

    OK

  4. 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.

    NG

    CONNECT SECURELY

    OK

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

      A0008FRE03
      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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK POWER MANAGEMENT CONTROL ECU


    1. Disconnect the A41 inverter water pump assembly connector.

    2. Turn the power switch on (IG).

    3. A0007JIE03
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

      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

    4. Turn the power switch off.

    5. Reconnect the A41 inverter water pump assembly connector.


    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

  7. 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.


    NEXT

  8. 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.

    Tech Tips

    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
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

      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.

    6. Turn the power switch off.


    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

    REPLACE INVERTER WATER PUMP ASSEMBLY Click here

  9. 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.

    NG

    CONNECT SECURELY

    OK

  10. CHECK INSTALLATION CONDITION (INV W/PMP RELAY)


    1. A0006CSE02
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Relay

      Check installation condition of the INV W/PMP relay.

      OK
      INV W/PMP relay is installed correctly.

    NG

    INSPECT RELAY (INV W/PMP) Click here

    OK

  11. 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. A0006SJE02
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Relay
      *3 IGCT Relay
      A0003SQE02
      Text in Illustration
      *a Example
      *b Shake Slightly
      *c Vibrate Slightly

      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

      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.

      Tech Tips


      • 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.

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


    NG

    CHECK INSTALLATION CONDITION (INV W/PMP RLY) Click here

    OK

  12. INSPECT RELAY (INV W/PMP)


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

    2. A00050SE37
      Text in Illustration
      *1 INV W/PMP Relay

      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

    3. Install the INV W/PMP relay.


    NG

    CHECK RELAY HOLDER TERMINAL (INV W/PMP RELAY) Click here

    OK

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


    1. Disconnect the A41 inverter water pump assembly connector.

    2. A00098ZE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter Water Pump Assembly)
      A0003SQE02
      Text in Illustration
      *a Example
      *b Shake Slightly
      *c Vibrate Slightly

      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

      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.

      Tech Tips


      • 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.

    3. Reconnect the A41 inverter water pump assembly connector.


    NG

    CHECK INSTALLATION CONDITION (INV W/P FUSE) Click here

    OK

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


    1. Disconnect the A41 inverter water pump assembly connector.

    2. A0005HHE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter Water Pump Assembly)

      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

    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. CHECK INSTALLATION CONDITION (INV W/P FUSE)


    1. A0003ULE02
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Fuse

      Check installation condition of the INV W/PMP fuse.

      OK
      INV W/PMP fuse is installed correctly.

    NG

    CONNECT SECURELY

    OK

  16. INSPECT RELAY (INV W/PMP)


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

    2. A00050SE37
      Text in Illustration
      *1 INV W/PMP Relay

      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

    3. Install the INV W/PMP relay.


    NG

    CHECK RELAY HOLDER TERMINAL (INV W/PMP RELAY) Click here

    OK

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

      A00067VE03
      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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  18. CHECK FUSE (INV W/PMP)


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

    2. A0003ULE02
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Fuse

      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

    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)

    NG

  19. REPLACE INVERTER WATER PUMP ASSEMBLY

    Click here


    NEXT

    REPLACE FUSE (INV W/PMP)

  20. 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.

    NG

    CHECK FUSE (INV W/PMP RLY) Click here

    OK

  21. CHECK FUSE (INV W/PMP RLY)


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

    2. A00045OE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP RLY Fuse

      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 1 Ω

    3. Install the INV W/PMP RLY fuse.


    OK

    REPLACE RELAY (INV W/PMP)

    NG

  22. REPLACE RELAY (INV W/PMP)


    NEXT

    REPLACE FUSE (INV W/PMP RLY)

  23. 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.

    OK

    REPLACE RELAY (INV W/PMP)

    NG

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

  24. CHECK FUSE (INV W/PMP RLY)


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

    2. A00045OE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP RLY Fuse

      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 1 Ω

    3. Install the INV W/PMP RLY fuse.


    NG

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

    OK

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


    NEXT

    REPLACE RELAY (INV W/PMP)

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


    NEXT

    REPLACE RELAY (INV W/PMP)

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


    NEXT

  28. REPLACE FUSE (INV W/PMP RLY)


    NEXT

    REPLACE FUSE (INV W/PMP)

  29. CHECK INSTALLATION CONDITION (INV W/PMP RLY)


    1. A00045OE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP RLY Fuse

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

      OK
      INV W/PMP RLY fuse is installed correctly.

    NG

    INSPECT RELAY (INV W/PMP) Click here

    OK

  30. CHECK FUSE (INV W/PMP RLY)


    1. A00045OE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP RLY Fuse

      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

    3. Install the INV W/PMP RLY fuse.


    OK

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

    NG

  31. 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.

    OK

    REPLACE FUSE (INV W/PMP RLY)

    NG

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


    NEXT

    REPLACE FUSE (INV W/PMP RLY)

  33. INSPECT RELAY (INV W/PMP)


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

    2. A00050SE37
      Text in Illustration
      *1 INV W/PMP Relay

      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

    3. Install the INV W/PMP relay.


    OK

    CONNECT SECURELY (INV W/PMP RLY FUSE)

    NG

    REPLACE RELAY (INV W/PMP) Click here

  34. INSPECT RELAY (INV W/PMP)


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

    2. A00050SE37
      Text in Illustration
      *1 INV W/PMP Relay

      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

    3. Install the INV W/PMP relay.


    OK

    CONNECT SECURELY (INV W/PMP RELAY)

    NG

    REPLACE RELAY (INV W/PMP) Click here

  35. REPLACE RELAY (INV W/PMP)


    NEXT

    CONNECT SECURELY (INV W/PMP RLY FUSE)

  36. REPLACE RELAY (INV W/PMP)


    NEXT

    CONNECT SECURELY (INV W/PMP RELAY)