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 assembly

  • INV W/PMP fuse

  • INV W/PMP RLY fuse

  • INV W/PMP relay

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

A011XPYE01

  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.

  5. Turn the power switch on (READY) and after a few seconds, turn the power switch off. [A]

  6. Repeat [A] 3 times. [B]

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

  8. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [C]

  9. Check that permanent DTCs are cleared.

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

Tech Tips

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

  • If no permanent DTC is output, the system is normal.

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 TECHSTREAM (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 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

    CHECK FUSE (INV W/PMP) Click here

    OK

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

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

      A011X3A
      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 ASSEMBLY CONNECTOR)

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

      A011XCM
      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 ASSEMBLY)

    1. Disconnect connector A38 from the power management control ECU.

    2. Disconnect connector A50 from the inverter water pump assembly.

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

      A011W4ME01
      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
      A38-14 (NIWP) - A50-2 (NWP) Power switch off Below 1 Ω
      A38-13 (IWP) - A50-3 (SWP) Power switch off Below 1 Ω
      A38-14 (NIWP) or A50-2 (NWP) -Body ground and other terminals Power switch off 10 kΩ or higher
      A38-13 (IWP) or A50-3 (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 assembly connector.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK POWER MANAGEMENT CONTROL ECU

    1. Disconnect connector A50 from the inverter water pump assembly.

    2. Turn the power switch on (IG).

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

      A011YF9E09
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A38-14 (NIWP) - I3-6 (E1) Power switch on (IG) 11 to 14 V
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

    4. Turn the power switch off.

    5. Connect the inverter water pump assembly connector.

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

  6. PERFORM ACTIVE TEST USING TECHSTREAM (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 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. Connect an oscilloscope between the power management control ECU terminals specified in the table below, and measure the waveform.

      A011W8DE09
      Item Content
      Terminal A38-14 (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 A is 300 msec or less.
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

    6. Turn the power switch off.

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

    REPLACE INVERTER WATER PUMP ASSEMBLY Click here

  7. CHECK FUSE (INV W/PMP)

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

      A011YRPE01

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

    3. Install the INV W/PMP fuse.

    NG

    Click here

    OK

  8. CHECK FUSE (INV W/PMP RLY)

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

      A011XNYE01

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

    3. Install the INV W/PMP RLY fuse.

    NG

    Click here

    OK

  9. INSPECT RELAY (INV W/PMP)

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

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

      A011WO3E05
      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
      Text in Illustration
      *1 INV W/PMP Relay

    3. Install the INV W/PMP relay.

    NG

    REPLACE RELAY (INV W/PMP)

    OK

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

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

      A011XCM
      OK
      The connectors are connected securely and there are no contact pressure problems.
    NG

    CONNECT SECURELY

    OK

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

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

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

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

      A011YZLE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Relay
      *3 IGCT Relay
      *4 INV W/PMP Fuse
      *5 INV W/PMP RLY Fuse
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      2 (INV W/PMP fuse) - 5 (INV W/PMP relay) Power switch off Below 1 Ω
      2 (INV W/PMP RLY fuse) - 1 (INV W/PMP relay) Power switch off Below 1 Ω
      1 (INV W/PMP RLY fuse) - 5 (IGCT relay) Power switch off Below 1 Ω
      2 (INV W/PMP Relay) - Body ground Power switch off Below 1 Ω
      2 (INV W/PMP fuse) or 5 (INV W/PMP relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      2 (INV W/PMP RLY fuse) or 1 (INV W/PMP relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      1 (INV W/PMP RLY 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/PMP fuse and INV W/PMP RLY fuse.

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. 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 connector A50 from the inverter water pump assembly.

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

      A011Y10E01
      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

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

    1. Disconnect connector A38 from the power management control ECU.

    2. Disconnect connector A50 from the inverter water pump assembly.

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

      A011W4ME02
      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
      A38-14 (NIWP) - A50-2 (NWP) Power switch off Below 1 Ω
      A38-13 (IWP) - A50-3 (SWP) Power switch off Below 1 Ω
      A50-1 (GND) - Body ground Power switch off Below 1 Ω
      A38-14 (NIWP) or A50-2 (NWP) - Body ground and other terminals Power switch off 10 kΩ or higher
      A38-13 (IWP) or A50-3 (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 assembly connector.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE INVERTER WATER PUMP ASSEMBLY Click here

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

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

      A011XCM
      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 ASSEMBLY - NO. 2 ENGINE ROOM RELAY BLOCK)

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

      A011YRPE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Fuse

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

    3. Disconnect connector A50 from the inverter water pump assembly.

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

      A011XJUE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block *2 INV W/PMP Relay
      *3 INV W/PMP Fuse - -
      *a

      Front view of wire harness connector

      (to Inverter Water Pump Assembly)

      		 - -
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A50-4 (+BWP) or 3 (INV W/PMP relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      5 (INV W/PMP relay) or 2 (INV W/PMP 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/PMP fuse.

    6. Install the INV W/PMP relay.

    7. Connect the inverter water pump assembly connector.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  16. REPLACE INVERTER WATER PUMP ASSEMBLY

    Click here

    NEXT

    REPLACE FUSE (INV W/PMP)

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

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

      A011XCM
      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. 2 ENGINE ROOM RELAY BLOCK (INVERTER WATER PUMP ASSEMBLY CIRCUIT))

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

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

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

      A011XWPE01
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 INV W/PMP Relay
      *3 IGCT Relay
      *4 INV W/PMP RLY Fuse
      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      2 (INV W/PMP RLY fuse) or 1 (INV W/PMP relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      1 (INV W/PMP RLY fuse) or 5 (IGCT relay) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Install the INV W/PMP RLY fuse.

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  19. REPLACE INVERTER WATER PUMP ASSEMBLY

    Click here

    NEXT

    REPLACE FUSE (INV W/PMP RLY)

  20. CONNECT SECURELY

    1. Connect the inverter water pump assembly connector securely.

    NEXT

    REPLACE FUSE (INV W/PMP)

  21. CONNECT SECURELY

    1. Connect the inverter water pump assembly connector securely.

    NEXT

    REPLACE FUSE (INV W/PMP RLY)