HYBRID CONTROL SYSTEM, Diagnostic DTC:P314A-828

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

DESCRIPTION

DTC No. INF Code DTC Detection Condition Trouble Area
P314A 828 Open in the inverter water pump assembly speed signal line or inverter water pump assembly power source circuit.

  • Wire harness or connector

  • Power management control ECU

  • Inverter water pump assembly

  • INV W/P fuse

WIRING DIAGRAM

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

INSPECTION PROCEDURE

Note

If DTC P0A78-284, 286, P0A79-692, 696, P0A7A-322, 324, P0A94-553 or 557 is output, replace the inverter with converter assembly after this inspection.

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (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 intelligent tester 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 assembly is operating (vibrating).

    6. Turn the power switch off.


    NG

    CHECK FUSE (INV W/P) Click here

    OK

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


    1. Check the connections of the power management control ECU connectors.

      A01NF3IE01
      Text in Illustration
      *1 for LHD *2 for RHD
      OK
      The connectors are connected securely and there are no contact problems.

    NG

    CONNECT SECURELY

    OK

  3. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR)


    1. A01NFK8

      Check the connection of the inverter water pump assembly connector.

      OK
      The connector is connected securely and there are no contact problems.

    NG

    CONNECT SECURELY

    OK

  4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - WATER PUMP WITH MOTOR)


    1. Disconnect connector A80 from the power management control ECU.

    2. Disconnect connector A73 from the inverter water pump assembly.

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

      A01NFAAE04
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      		 *2

      Front view of wire harness connector

      (to Inverter Water Pump Assembly)
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A73-2 (NWP) - A80-14 (NIWP) Power switch off Below 1 Ω
      A73-3 (SWP) - A80-13 (IWP) Power switch off Below 1 Ω
      A73-2 (NWP) or A80-14 (NIWP) -Body ground and other terminals Power switch off 10 kΩ or higher
      A73-3 (SWP) or A80-13 (IWP) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Connect the power management control ECU connector.

    5. Connect the inverter water pump assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK POWER MANAGEMENT CONTROL ECU


    1. Disconnect connector A73 from the inverter water pump assembly.

    2. Turn the power switch on (IG).

    3. A01NERPE26

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A80-14 (NIWP) - F97-6 (E1) Power switch on (IG) 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    4. Turn the power switch off.

    5. Connect the inverter water pump assembly connector.


    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    A

    REPLACE INVERTER WATER PUMP ASSEMBLY Click here

  6. CHECK FUSE (INV W/P)


    1. A01NFC4E03
      Text in Illustration
      *1 Engine Room Relay Block No. 2
      *2 INV W/P Fuse

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      INV W/P fuse Always Below 1Ω

    3. Install the INV W/P fuse.


    NG

    Click here

    OK

  7. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR)


    1. A01NFK8

      Check the connection of the inverter water pump assembly connector.

      OK
      The connector is connected securely and there are no contact problems.

    NG

    CONNECT SECURELY

    OK

  8. CHECK HARNESS AND CONNECTOR (INVERTER WATER PUMP ASSEMBLY CIRCUIT)


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

    2. Remove the IGCT MAIN relay from the engine room relay block No. 2.

    3. Disconnect connector A80 from the power management control ECU.

    4. Disconnect connector A73 from the inverter water pump assembly.

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

      A01NG06E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Management Control ECU)

      		 *2 Engine Room Relay Block No. 2
      *3 IGCT MAIN Relay *4 INV W/P Fuse
      *5

      Front view of wire harness connector

      (to Inverter Water Pump Assembly)

      		 - -
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      2 (INV W/P fuse) - A73-4 (+BWP) Power switch off Below 1 Ω
      1 (INV W/P fuse) - 3 (IGCT MAIN relay) Power switch off Below 1 Ω
      A73-1 (GND) - Body ground Power switch off Below 1 Ω
      A73-2 (NWP) - A80-14 (NIWP) Power switch off Below 1 Ω
      A73-3 (SWP) - A80-13 (IWP) Power switch off Below 1 Ω
      2 (INV W/P fuse) or A73-4 (+BWP) - Body ground and other terminals Power switch off 10kΩ or higher
      1 (INV W/P fuse) or 3 (IGCT MAIN relay) - Body ground and other terminals Power switch off 10kΩ or higher
      A73-2 (NWP) or A80-14 (NIWP) - Body ground and other terminals Power switch off 10kΩ or higher
      A73-3 (SWP) or A80-13 (IWP) - Body ground and other terminals Power switch off 10kΩ 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.

    6. Install the INV W/P fuse.

    7. Install the IGCT MAIN relay.

    8. Connect the power management control ECU connector.

    9. Connect the inverter water pump assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE INVERTER WATER PUMP ASSEMBLY Click here

  9. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR)


    1. A01NFK8

      Check the connection of the inverter water pump assembly connector.

      OK
      The connector is connected securely and there are no contact problems.

    NG

    CONNECT SECURELY Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (INVERTER WATER PUMP ASSEMBLY CIRCUIT)


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

    2. Disconnect connector A73 from the inverter water pump assembly.

    3. A01NG9WE01
      Text in Illustration
      *1 Engine Room Relay Block No. 2
      *2 INV W/P Fuse
      *3

      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 Switch Condition Specified Condition
      2 (INV W/P fuse) or A73-4 (+BWP) - 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/P fuse.

    5. Connect the inverter water pump assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  11. REPLACE INVERTER WATER PUMP ASSEMBLY


    1. Replace the inverter water pump assembly Click here.


    NEXT

    REPLACE FUSE (INV W/P)

  12. CONNECT SECURELY


    1. Connect the inverter water pump assembly connector securely.


    NEXT

    REPLACE FUSE (INV W/P)

  13. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the wire harness or connector.


    NEXT

    REPLACE FUSE (INV W/P)