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 Open in the water pump speed signal line or water pump power source circuit.

  • Wire harness or connector

  • Power management control ECU

  • Inverter water pump with motor assembly

  • INV W/P fuse

  • IGCT No. 2 fuse

  • INV W/P relay

WIRING DIAGRAM

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

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. 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 with motor 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 with motor assembly and check that it is operating (vibrating).

      OK
      The inverter water pump with motor 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. A01FQC6E01
      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

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


    1. A01FTJG

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

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

    NG

    CONNECT SECURELY

    OK

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


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

    2. Disconnect the connector from the inverter water pump with motor assembly.

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

      A01FTQYE06
      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 with Motor Assembly)
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A35-12 (NIWP) - A26-2 (NWP) Power switch off Below 1 Ω
      A35-13 (IWP) - A26-3 (SWP) Power switch off Below 1 Ω
      A35-12 (NIWP) or A26-2 (NWP) - Body ground and other terminals Power switch off 10 kΩ or higher
      A35-13 (IWP) or A26-3 (SWP) - 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 with motor assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK POWER MANAGEMENT CONTROL ECU


    1. Disconnect the connector A26 from the inverter water pump with motor assembly.

    2. Turn the power switch on (IG).

    3. A01FV0LE21
      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 Switch Condition Specified Condition
      A35-12 (NIWP) - N91-6 (E1) Power switch on (IG) 11 to 14 V

    4. Turn the power switch off.

    5. Connect the inverter water pump with motor assembly connector.


    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

  6. 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 with motor 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. Connect an oscilloscope to each terminal of the power management control ECU.

    5. A01FQQSE01
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

      Measure the waveform while the "Activate the Water Pump" Active Test is being performed.

      Item Contents
      Tester Connection A35-12 (NIWP) - N91-6 (E1)
      Equipment Setting 5 V/DIV., 10 ms/DIV.
      Condition

      Power switch on (IG)

      "Activate the Water Pump" Active Test is being performed
      OK
      Period of waveform is 300 milliseconds or less

    6. Turn the power switch off.


    NG

    REPLACE INVERTER WATER PUMP WITH MOTOR ASSEMBLY Click here

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  7. CHECK FUSE (INV W/P)


    1. A01FVKME01
      Text in Illustration
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 INV W/P Fuse

      Remove the INV W/P fuse from the No. 1 engine room relay block and junction block assembly.

    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 1 Ω

    3. Install the INV W/P fuse.


    NG

    Click here

    OK

  8. CHECK FUSE (IGCT NO. 2)


    1. A01FQGOE01
      Text in Illustration
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 IGCT No. 2 Fuse

      Remove the IGCT No. 2 fuse from the No. 1 engine room relay block and junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      IGCT No. 2 fuse Always Below 1 Ω

    3. Install the IGCT No. 2 fuse.


    NG

    Click here

    OK

  9. INSPECT RELAY (INV W/P)


    1. A01FTTCE01
      Text in Illustration
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 INV W/P Relay

      Remove the INV W/P relay from the No. 1 engine room relay block and junction block assembly.

    2. A01FQ82E03
      Text in Illustration
      *1 INV W/P 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 1 Ω

    3. Install the INV W/P relay.


    NG

    REPLACE RELAY (INV W/P)

    OK

  10. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP WITH MOTOR ASSEMBLY CONNECTOR)


    1. A01FTJG

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

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

    NG

    CONNECT SECURELY

    OK

  11. CHECK HARNESS AND CONNECTOR (NO. 1 ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY (INVERTER WATER PUMP WITH MOTOR ASSEMBLY CIRCUIT))


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

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

    3. A01FTVGE01
      Text in Illustration
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 INV W/P Fuse
      *3 IGCT No. 2 Fuse
      *4 INV W/P Relay
      *5 IGCT Relay

      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) - 5 (INV W/P relay) Power switch off Below 1 Ω
      2 (IGCT No. 2 fuse) - 1 (INV W/P relay) Power switch off Below 1 Ω
      1 (IGCT No. 2 fuse) - 5 (IGCT relay) Power switch off Below 1 Ω
      2 (INV W/P Relay) - Body ground Power switch off Below 1 Ω
      2 (INV W/P fuse) or 5 (INV W/P relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      2 (IGCT No. 2 fuse) or 1 (INV W/P relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      1 (IGCT No. 2 fuse) or 5 (IGCT 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/P fuse and IGCT No. 2 fuse.

    5. Install the INV W/P relay and IGCT relay.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK HARNESS AND CONNECTOR (INVERTER WATER PUMP WITH MOTOR ASSEMBLY - NO. 1 ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY)


    1. Remove the INV W/P relay from the No. 1 engine room relay block and junction block assembly.

    2. Disconnect the connector from the inverter water pump with motor assembly.

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

      A01FVHYE01
      Text in Illustration
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly *2 INV W/P Relay
      *a

      Front view of wire harness connector

      (to Inverter Water Pump with Motor Assembly)

      		 - -
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A26-4 (+BWP) - 3 (INV W/P relay) Power switch off Below 1 Ω
      A26-4 (+BWP) or 3 (INV W/P 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/P relay.

    5. Connect the inverter water pump with motor assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

    2. Disconnect the connector from the inverter water pump with motor assembly.

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

      A01FTQYE07
      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 with Motor Assembly)
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A35-12 (NIWP) - A26-2 (NWP) Power switch off Below 1 Ω
      A35-13 (IWP) - A26-3 (SWP) Power switch off Below 1 Ω
      A26-1 (GND) - Body ground Power switch off Below 1 Ω
      A35-12 (NIWP) or A26-2 (NWP) - Body ground and other terminals Power switch off 10 kΩ or higher
      A35-13 (IWP) or A26-3 (SWP) - 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 with motor assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE INVERTER WATER PUMP WITH MOTOR ASSEMBLY Click here

  14. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP WITH MOTOR ASSEMBLY CONNECTOR)


    1. A01FTJG

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

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

    NG

    CONNECT SECURELY Click here

    OK

  15. CHECK HARNESS AND CONNECTOR (INVERTER WATER PUMP WITH MOTOR ASSEMBLY - NO. 1 ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY)


    1. Remove the INV W/P fuse from the No. 1 engine room relay block and junction block assembly.

    2. Remove the INV W/P relay from the No. 1 engine room relay block and junction block assembly.

    3. Disconnect the connector from the inverter water pump with motor assembly.

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

      A01FR60E01
      Text in Illustration
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly *2 INV W/P Fuse
      *3 INV W/P Relay - -
      *a

      Front view of wire harness connector

      (to Inverter Water Pump with Motor Assembly)

      		 - -
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A26-4 (+BWP) or 3 (INV W/P relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      5 (INV W/P relay) or 2 (INV W/P fuse) - 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.

    5. Install the INV W/P fuse.

    6. Install the INV W/P relay.

    7. Connect the inverter water pump with motor assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  16. REPLACE INVERTER WATER PUMP WITH MOTOR ASSEMBLY

    Click here


    NEXT

    REPLACE FUSE (INV W/P)

  17. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP WITH MOTOR ASSEMBLY CONNECTOR)


    1. A01FTJG

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

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

    NG

    CONNECT SECURELY Click here

    OK

  18. CHECK HARNESS AND CONNECTOR (NO. 1 ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY (INVERTER WATER PUMP WITH MOTOR ASSEMBLY CIRCUIT))


    1. Remove the IGCT No. 2 fuse from the No. 1 engine room relay block and junction block assembly.

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

    3. A01FQICE01
      Text in Illustration
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 IGCT No. 2 Fuse
      *3 INV W/P Relay
      *4 IGCT Relay

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      2 (IGCT No. 2 fuse) or 1 (INV W/P relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      1 (IGCT No. 2 fuse) or 5 (IGCT relay) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Install the IGCT No. 2 fuse.

    5. Install the INV W/P relay and IGCT relay.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  19. REPLACE INVERTER WATER PUMP WITH MOTOR ASSEMBLY

    Click here


    NEXT

    REPLACE FUSE (IGCT NO. 2)

  20. CONNECT SECURELY


    1. Connect the inverter water pump with motor assembly connector securely.


    NEXT

    REPLACE FUSE (INV W/P)

  21. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

    REPLACE FUSE (INV W/P)

  22. CONNECT SECURELY


    1. Connect the inverter water pump with motor assembly connector securely.


    NEXT

    REPLACE FUSE (IGCT NO. 2)

  23. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

    REPLACE FUSE (IGCT NO. 2)