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.

The inverter water pump assembly sends the inverter water pump speed (measured value) signal to the power management control ECU. If the inverter water pump speed (measured value) signal is not sent to the power management control ECU when the power switch is on (READY), this DTC is stored.

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 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

Tech Tips


  • A malfunction (open, short to +B or short to ground) in the speed signal line from the inverter water pump assembly to the power management control ECU is detected.

  • A malfunction in the inverter water pump assembly power source circuit is detected.

  • A malfunction in power management control ECU power source circuit is detected.

Related Data List
DTC No. Active Test
P314A-828

  • Inverter W/P Revolution

  • (Inverter) W/P Run Control Duty

  • Ready Signal
Related Active Test
DTC No. Active Test
P314A-828 Activate the (Inverter) Water Pump

MONITOR DESCRIPTION

The power management control ECU monitors speed of the inverter water pump assembly. If there is an abnormality in speed, the power management control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs P314A (INF 828): Water pump malfunction
Required sensors / components Inverter Water Pump Assembly
Frequency of operation Continuous
Duration TMC's intellectual property
MIL operation Immediately
Sequence of operation None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present TMC's intellectual property
Other conditions belong to TMC's intellectual property -

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property -

COMPONENT OPERATING RANGE

Power management control ECU DTC P314A (INF 828) is not detected

CONFIRMATION DRIVING PATTERN

A01I2VEE01

  1. Connect the Techstream to the DLC3.

  2. Turn the power switch on (IG) and turn the Techstream on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 30 seconds or more.

  5. Turn the power switch on (IG) and turn the Techstream on.

  6. Turn the power switch on (READY) and wait for 2 minutes or more. [A]

  7. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [B]

  8. Read the current DTCs.

    Tech Tips


    • If a current DTC is output, the system is malfunctioning.

    • If current DTCs are not output, perform the following steps to check for permanent DTCs.

  9. Check that the permanent DTCs are cleared.

  10. If the permanent DTCs are not cleared, perform a universal trip, and then check for permanent DTCs again.

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.

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 Techstream to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Clear DTCs and freeze frame data.

    5. Turn the power switch off.


    NEXT

  2. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE (INVERTER) 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 Techstream 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

    Click here

    OK

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


    1. A01I61A

      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. A01I4F4

      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 A38 power management control ECU connector.

    2. Disconnect the A50 inverter water pump assembly connector.

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

      A01I4D2E26
      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 Switch Condition Specified Condition
      A38-12 (NIWP) - A50-2 (NWP) Power switch off Below 1 Ω
      A38-12 (NIWP) or A50-2 (NWP) -Body ground and other terminals Power switch off 10 kΩ or higher

    4. Reconnect the A38 power management control ECU connector.

    5. Reconnect the A50 inverter water pump assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK POWER MANAGEMENT CONTROL ECU


    1. Disconnect the A50 inverter water pump assembly connector.

    2. Turn the power switch on (IG).

    3. A01I5JUE39
      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
      A38-12 (NIWP) - I3-6 (E1) Power switch on (IG) 11 to 14 V

    4. Turn the power switch off.

    5. Reconnect the A50 inverter water pump assembly connector.


    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

  7. CLEAR DTC


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Clear DTCs and freeze frame data.

    5. Turn the power switch off.


    NEXT

  8. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE (INVERTER) 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 Techstream 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. A01I60NE05
      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 A38-12 (NIWP) - I3-6 (E1)
      Equipment Setting 5 V/DIV., 100 ms./DIV.
      Condition Power switch on (IG), during Active Test
      OK
      The duration of wavelength is 300 msec or less.

    6. Turn the power switch off.


    NG

    REPLACE INVERTER WATER PUMP ASSEMBLY Click here

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

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


    1. A01I4F4

      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. A01I5PRE01
      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 IGCT relay and INV W/PMP relay from the No. 2 engine room relay block.

    2. A01I3AVE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Relay
      *3 IGCT Relay

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      5 (IGCT relay) - 1 (INV W/PMP 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 holders will be damaged.

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


    NG

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

    OK

  12. INSPECT RELAY (INV W/PMP)


    1. A01I5PRE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Relay

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

    2. A01I4AEE03
      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 A50 inverter water pump assembly connector.

    2. A01I50PE12
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter Water Pump Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A50-4 (+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.

    3. Reconnect the A50 inverter water pump assembly connector.


    NG

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

    OK

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


    1. A01I50PE13
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Inverter Water Pump Assembly)

      Disconnect the A50 inverter water pump assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A50-1 (GND) - Body ground Power switch off Below 1 Ω

    3. Reconnect the A50 inverter water pump assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE INVERTER WATER PUMP ASSEMBLY Click here

  15. CHECK INSTALLATION CONDITION (INV W/PMP FUSE)


    1. A01I538E01
      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. A01I5PRE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Relay

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

    2. A01I4AEE03
      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 A50 inverter water pump assembly connector.

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

      A01I5Y5E01
      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 Switch Condition Specified Condition
      A50-4 (+BWP) - 3 (INV W/PMP relay) Power switch off Below 1 Ω
      A50-4 (+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. Connect the inverter water pump assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  18. CHECK FUSE (INV W/PMP)


    1. A01I538E01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Fuse

      Remove the INV W/PMP 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 fuse Always Below 1Ω

    3. Install the INV W/PMP fuse.


    NG

    REPLACE INVERTER WATER PUMP ASSEMBLY Click here

    OK

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

  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. A01I3LKE01
      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.


    NG

    REPLACE RELAY (INV W/PMP) Click here

    OK

    REPLACE RELAY (INV W/PMP)

  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.

    NG

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

    OK

    REPLACE RELAY (INV W/PMP)

  24. CHECK FUSE (INV W/PMP RLY)


    1. A01I3LKE01
      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.


    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 RELAY (INV W/PMP)

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


    1. A01I3LKE01
      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. A01I3LKE01
      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.


    NG

    CHECK FUSE HOLDER TERMINAL (INV W/PMP RLY FUSE) Click here

    OK

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

  31. CHECK FUSE HOLDER TERMINAL (INV W/PMP RLY FUSE)


    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.

    NG

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

    OK

    REPLACE FUSE (INV W/PMP RLY)

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


    NEXT

    REPLACE FUSE (INV W/PMP RLY)

  33. INSPECT RELAY (INV W/PMP)


    1. A01I5PRE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Relay

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

    2. A01I4AEE03
      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

    REPLACE RELAY (INV W/PMP) Click here

    OK

    CONNECT SECURELY (INV W/PMP RLY FUSE)

  34. INSPECT RELAY (INV W/PMP)


    1. A01I5PRE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Relay

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

    2. A01I4AEE03
      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

    REPLACE RELAY (INV W/PMP) Click here

    OK

    CONNECT SECURELY (INV W/PMP RELAY)

  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)