HYBRID CONTROL SYSTEM, Diagnostic DTC:P314A-828

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 hybrid vehicle control ECU assembly.

*: Either of the following conditions is met.

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

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

• A malfunction in the +B line is detected.

• A malfunction in hybrid vehicle control ECU assembly power source circuit is detected.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0C73-776.

Click here

CAUTION / NOTICE / HINT

PROCEDURE

1. CLEAR DTC

   Result
   Proceed to NEXT

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

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

   4. Read and record the DTCs and freeze frame data.

      
      Powertrain > Hybrid Control > Trouble Codes

   5. Clear the DTCs and freeze frame data.

      
      Powertrain > Hybrid Control > Clear DTCs

   6. Turn the power switch off.

      Result
      Proceed to NEXT

   
   

   NEXT

2. PERFORM ACTIVE TEST USING GTS (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 GTS to the DLC3.

   2. Turn the power switch on (IG).

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

      
      Powertrain > Hybrid Control > Active Test

      Tester Display
      Activate the (Inverter) Water Pump

   4. Perform the "Activate the (Inverter) 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.

      Result
      Proceed to OK NG

   
   

   NG

   CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR) Click here

   OK

3. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR)

   Result
   Proceed to OK NG

   
   

   1. Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU assembly connectors.

      Click here

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

      

      *A

      for LHD

      *B

      for RHD

      Result
      Proceed to OK NG

   
   

   NG

   CONNECT SECURELY

   OK

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

   Result
   Proceed to OK NG

   
   

   1. 

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

      Click here

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

      Result
      Proceed to OK NG

   
   

   NG

   CONNECT SECURELY

   OK

5. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - INVERTER WATER PUMP ASSEMBLY)

   
   

   1. Disconnect the A80 hybrid vehicle control ECU assembly connector.

   2. Disconnect the A12 inverter water pump assembly connector.

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

      

      *a

      Rear view of wire harness connector (to Hybrid Vehicle Control ECU Assembly)

      *b

      Front view of wire harness connector (to Inverter Water Pump Assembly)

      Standard Resistance
      Tester Connection Condition Specified Condition A80-14 (NIWP) - A12-2 (NWP) Power switch off Below 1 Ω A80-14 (NIWP) or A12-2 (NWP) -Body ground and other terminals Power switch off 10 kΩ or higher

   4. Reconnect the A12 inverter water pump assembly connector.

   5. Reconnect the A80 hybrid vehicle control ECU assembly connector.

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY

   
   

   1. Disconnect the A12 inverter water pump assembly connector.

   2. Turn the power switch on (IG).

   3. 

      *a	Component with harness connected (Hybrid Vehicle Control ECU Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition A80-14 (NIWP) - O141-6 (E1) Power switch on (IG) 11 to 14 V

   4. Turn the power switch off.

   5. Reconnect the A12 inverter water pump assembly connector.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

   OK

7. CLEAR DTC

   Result
   Proceed to NEXT

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

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

   4. Read and record the DTCs and freeze frame data.

      
      Powertrain > Hybrid Control > Trouble Codes

   5. Clear the DTCs and freeze frame data.

      
      Powertrain > Hybrid Control > Clear DTCs

   6. Turn the power switch off.

      Result
      Proceed to NEXT

   
   

   NEXT

8. PERFORM ACTIVE TEST USING GTS (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 GTS to the DLC3.

   2. Turn the power switch on (IG).

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

      
      Powertrain > Hybrid Control > Active Test

      Tester Display
      Activate the (Inverter) Water Pump

   4. Perform the "Activate the (Inverter) Water Pump" Active Test.

   5. 

      *a	Component with harness connected (Hybrid Vehicle Control ECU Assembly)

      Connect an oscilloscope between the hybrid vehicle control ECU assembly terminals specified in the table below, and measure the waveform.

      Item	Content
      Terminal	A80-14 (NIWP) - O141-6 (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.

   6. Turn the power switch off.

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

   NG

   REPLACE INVERTER WATER PUMP ASSEMBLY Click here

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

   Result
   Proceed to OK NG

   
   

   1. 

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

      Click here

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

      Result
      Proceed to OK NG

   
   

   NG

   CONNECT SECURELY (INVERTER WATER PUMP ASSEMBLY CONNECTOR)

   OK

10. CHECK INSTALLATION CONDITION (INV W/PMP RELAY)

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	INV W/PMP Relay

       Check installation condition of the INV W/PMP relay.

       OK
       INV W/PMP relay is installed correctly.

       Result
       Proceed to OK NG

    
    

    NG

    INSPECT RELAY (INV W/PMP) Click here

    OK

11. CHECK HARNESS AND CONNECTOR (IGCT RELAY - INV W/PMP RELAY)

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	IGCT Relay
       *3	INV W/PMP Relay

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

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

       Standard Resistance
       Tester Connection 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 terminals will be damaged.

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

       Result
       Proceed to OK NG

    
    

    NG

    CHECK INSTALLATION CONDITION (IGCT NO. 4 FUSE) Click here

    OK

12. INSPECT RELAY (INV W/PMP)

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	INV W/PMP Relay

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

    2. 

       *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 1 Ω

    3. Install the INV W/PMP relay.

       Result
       Proceed to OK NG

    
    

    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 A12 inverter water pump assembly connector.

    2. 

       *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 Condition Specified Condition A12-4 (+BWP) - Body ground Power switch on (IG) 11 to 14 V

       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.

       • Turning the power switch on (IG) with the inverter water pump with motor assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    3. Reconnect the A12 inverter water pump assembly connector.

       Result
       Proceed to OK NG

    
    

    NG

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

    OK

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

    
    

    1. Disconnect the A12 inverter water pump assembly connector.

    2. 

       *a	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 Condition Specified Condition A12-1 (GND) - Body ground Power switch off Below 1 Ω

    3. Reconnect the A12 inverter water pump assembly connector.

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE INVERTER WATER PUMP ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

15. INSPECT RELAY (INV W/PMP)

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	INV W/PMP Relay

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

    2. 

       *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 1 Ω

    3. Install the INV W/PMP relay.

       Result
       Proceed to OK NG

    
    

    OK

    CONNECT SECURELY (INV W/PMP RELAY)

    NG

    REPLACE RELAY (INV W/PMP)

16. CHECK INSTALLATION CONDITION (IGCT NO. 4 FUSE)

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	IGCT NO. 4 Fuse

       Check installation condition of the IGCT NO. 4 fuse.

       OK
       IGCT NO. 4 fuse is installed correctly.

       Result
       Proceed to OK NG

    
    

    NG

    INSPECT RELAY (INV W/PMP) Click here

    OK

17. CHECK FUSE (IGCT NO. 4)

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	IGCT NO. 4 Fuse

       Remove the IGCT NO. 4 fuse from the No. 1 engine room relay block and No. 1 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. 4 fuse Always Below 1 Ω

    3. Install the IGCT NO. 4 fuse.

       Result
       Proceed to OK NG

    
    

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    CHECK FUSE HOLDER TERMINAL (IGCT NO. 4 FUSE) Click here

18. 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.

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE RELAY (INV W/PMP)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

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

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	INV W/PMP Fuse

       Check installation condition of the INV W/PMP fuse.

       OK
       INV W/PMP fuse is installed correctly.

       Result
       Proceed to OK NG

    
    

    NG

    CONNECT SECURELY

    OK

20. INSPECT RELAY (INV W/PMP)

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	INV W/PMP Relay

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

    2. 

       *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 1 Ω

    3. Install the INV W/PMP relay.

       Result
       Proceed to OK NG

    
    

    NG

    CHECK RELAY HOLDER TERMINAL (INV W/PMP RELAY) Click here

    OK

21. CHECK HARNESS AND CONNECTOR (INVERTER WATER PUMP ASSEMBLY - NO. 1 ENGINE ROOM RELAY BLOCK)

    
    

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

    2. Disconnect the A12 inverter water pump assembly connector.

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

       

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly	*2	INV W/PMP relay
       *a	Front view of wire harness connector (to Inverter Water Pump Assembly)	-	-

       Standard Resistance
       Tester Connection Condition Specified Condition A12-4 (+BWP) - 3 (INV W/PMP relay) Power switch off Below 1 Ω A12-4 (+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. Reconnect the A12 inverter water pump assembly connector.

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

22. CHECK FUSE (INV W/PMP)

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	INV W/PMP Fuse

       Remove the INV W/PMP fuse from the No. 1 engine room relay block and No. 1 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/PMP fuse Always Below 1 Ω

    3. Install the INV W/PMP fuse.

       Result
       Proceed to OK NG

    
    

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE INVERTER WATER PUMP ASSEMBLY Click here

23. INSPECT RELAY (INV W/PMP)

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	INV W/PMP Relay

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

    2. 

       *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 1 Ω

    3. Install the INV W/PMP relay.

       Result
       Proceed to OK NG

    
    

    OK

    CONNECT SECURELY (IGCT NO. 4 FUSE)

    NG

    REPLACE RELAY (INV W/PMP) Click here

24. CHECK FUSE HOLDER TERMINAL (IGCT NO. 4 FUSE)

    
    

    1. Check the terminals of the IGCT No. 4 fuse holder.

       OK
       The terminals of the IGCT No. 4 fuse holder are not bent, loose or corroded.

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE FUSE (IGCT NO. 4)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

25. REPAIR OR REPLACE HARNESS OR CONNECTOR

    
    

    1. Repair or replace the terminals of the INV W/PMP relay holder.

       Result
       Proceed to NEXT

    
    

    NEXT

    REPLACE RELAY (INV W/PMP)

26. 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.

       Result
       Proceed to OK NG

    
    

    NG

    CHECK FUSE (IGCT NO. 4) Click here

    OK

27. CHECK FUSE (IGCT NO. 4)

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	IGCT NO. 4 Fuse

       Remove the IGCT NO. 4 fuse from the No. 1 engine room relay block and No. 1 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. 4 fuse Always Below 1 Ω

    3. Install the IGCT NO. 4 fuse.

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE RELAY (INV W/PMP)

    NG

    REPLACE RELAY (INV W/PMP) Click here

28. REPLACE INVERTER WATER PUMP ASSEMBLY

    Click here

    Result
    Proceed to NEXT

    
    

    NEXT

    REPLACE FUSE (INV W/PMP)

29. REPLACE RELAY (INV W/PMP)

    
    

    1. Replace INV W/PMP relay.

       Result
       Proceed to NEXT

    
    

    NEXT

    CONNECT SECURELY (IGCT NO. 4 FUSE)

30. REPAIR OR REPLACE HARNESS OR CONNECTOR

    
    

    1. Repair or replace the terminals of the IGCT No. 4 fuse holder.

       Result
       Proceed to NEXT

    
    

    NEXT

    REPLACE FUSE (IGCT NO. 4)

31. CHECK FUSE (IGCT NO. 4)

    
    
    1. 

       *1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
       *2	IGCT NO. 4 Fuse

       Remove the IGCT NO. 4 fuse from the No. 1 engine room relay block and No. 1 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. 4 fuse Always Below 1 Ω

    3. Install the IGCT NO. 4 fuse.

       Result
       Proceed to OK NG

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

32. REPAIR OR REPLACE HARNESS OR CONNECTOR

    
    

    1. Repair or replace the terminals of the INV W/PMP relay holder.

       Result
       Proceed to NEXT

    
    

    NEXT

    REPLACE RELAY (INV W/PMP)

33. REPLACE RELAY (INV W/PMP)

    
    

    1. Replace INV W/PMP relay.

       Result
       Proceed to NEXT

    
    

    NEXT

    REPLACE FUSE (IGCT NO. 4)

34. REPAIR OR REPLACE HARNESS OR CONNECTOR

    
    

    1. Repair or replace the terminals of the INV W/PMP relay holder.

       Result
       Proceed to NEXT

    
    

    NEXT

35. REPLACE RELAY (INV W/PMP)

    
    

    1. Replace INV W/PMP relay.

       Result
       Proceed to NEXT

    
    

    NEXT

    REPLACE FUSE (IGCT NO. 4)