P314A

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P314A-828: Inverter Coolant Pump Speed Signal
P314A-828 - Inverter Coolant Pump Speed Signal

DESCRIPTION

Refer to the description for DTC P0C73-776 P0C73.





MONITOR DESCRIPTION

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

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





CONFIRMATION DRIVING PATTERN





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.

HINT
- 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 P0C73.

INSPECTION PROCEDURE

NOTICE:
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)

NOTICE:
Be sure to perform the inspection with the auxiliary battery voltage at 11 V or more.

HINT
When the auxiliary battery voltage is low, the inverter water pump assembly may not operate.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump.

(d) Perform the Activate the Water Pump Active Test.

(e) Touch the inverter water pump assembly and check that it is operating (vibrating).

OK:

The water pump is operating (vibrating).

(f) Turn the power switch off.

NG -- CHECK FUSE (IGCT NO. 3)
OK -- Continue to next step.

2. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR) P0340-886

NG -- CONNECT SECURELY
OK -- Continue to next step.

3. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR) P0C73

NG -- CONNECT SECURELY
OK -- Continue to next step.

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

(a) Disconnect connector A19 from the power management control ECU.

(b) Disconnect connector e1 from the inverter water pump assembly.

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





Text in Illustration





Standard Resistance:





(d) Connect the power management control ECU connector.

(e) Connect the inverter water pump assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK POWER MANAGEMENT CONTROL ECU

(a) Disconnect connector e1 from the inverter water pump assembly.

(b) Turn the power switch on (IG).

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





Standard Voltage:





Text in Illustration





(d) Turn the power switch off.

(e) Connect the inverter water pump assembly connector.

NG -- REPLACE POWER MANAGEMENT CONTROL ECU Components
OK -- Continue to next step.

6. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE WATER PUMP)

NOTICE:
Be sure to perform the inspection with the auxiliary battery voltage at 11 V or more.

HINT
When the auxiliary battery voltage is low, the inverter water pump assembly may not operate.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump.

(d) Select Inverter W/P Revolution in the Data List.

(e) While performing the "Activate the Water Pump" Active Test, check Inverter W/P Revolution in the Data List.

Result:





HINT
Perform the Active Test with the inverter coolant temperature between 5 to 149°F (-15 and 65°C).

(f) Turn the power switch off.

NG -- REPLACE POWER MANAGEMENT CONTROL ECU Components

OK -- REPLACE INVERTER WATER PUMP ASSEMBLY Components

7. CHECK FUSE (IGCT NO. 3)

(a) Remove the IGCT No. 3 fuse from the engine room junction block assembly.





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

Standard Resistance:





Text in Illustration





(c) Install the IGCT No. 3 fuse.

NG -- CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR)
OK -- Continue to next step.

8. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR) P0C73

NG -- CONNECT SECURELY
OK -- Continue to next step.

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

(a) Remove the IGCT No. 3 fuse from the engine room junction block assembly.

(b) Remove the IGCT relay from the engine room junction block assembly.

(c) Disconnect connector A19 from the power management control ECU.

(d) Disconnect connector e1 from the inverter water pump assembly.

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





Text in Illustration





Standard Resistance:





NOTICE:
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.

(f) Install the IGCT No. 3 fuse.

(g) Install the IGCT relay.

(h) Connect the power management control ECU connector.

(i) Connect the inverter water pump assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE INVERTER WATER PUMP ASSEMBLY Components

10. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR) P0C73

NG -- CONNECT SECURELY
OK -- Continue to next step.

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

(a) Remove the IGCT No. 3 fuse from the engine room junction block assembly.

(b) Disconnect connector e1 from the inverter water pump assembly.

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





Standard Resistance:





Text in Illustration





NOTICE:
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.

(d) Install the IGCT No. 3 fuse.

(e) Connect the inverter water pump assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

12. REPLACE INVERTER WATER PUMP ASSEMBLY

(a) Replace the inverter water pump assembly Components.

NEXT -- REPLACE FUSE (IGCT NO. 3)

13. CONNECT SECURELY

(a) Connect the inverter water pump assembly connector securely.

NEXT -- REPLACE FUSE (IGCT NO. 3)

14. REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Repair or replace the wire harness or connector.

NEXT -- REPLACE FUSE (IGCT NO. 3)