Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001H3MW
Model Year Start: 2019 Model: RAV4 HV Prod Date Range: [02/2019 -           ]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): P0C7396; Motor Electronics Coolant Pump "A" Component Internal Failure; 2019 - 2024 MY RAV4 HV [02/2019 -        ]

DTC

P0C7396

Motor Electronics Coolant Pump "A" Component Internal Failure

DTC SUMMARY

MALFUNCTION DESCRIPTION

This DTC is stored when the inverter water pump assembly is malfunctioning. The cause of this malfunction may be one of the following:

Inverter water pump assembly malfunction

  • Inverter water pump assembly internal malfunction
  • Open or short in wire harness
  • Improperly connected connector

Hybrid cooling system malfunction

  • Foreign matter in inverter water pump assembly
  • Hybrid cooling system coolant is frozen

HINT:

If this DTC is stored, the driving torque may be restricted.

DESCRIPTION

The inverter water pump assembly transmits rotation speed information to the hybrid vehicle control ECU assembly. The hybrid vehicle control ECU assembly monitors the speed and detects malfunctions.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0C7396

Motor Electronics Coolant Pump "A" Component Internal Failure

The inverter water pump assembly revolution speed is abnormally high or low (or stopped) for 1 minute or more.

(1 trip detection logic)

  • Inverter cooling system
  • Wire harness or connector
  • Inverter water pump assembly
  • Hybrid vehicle control ECU assembly

Comes on

Master Warning:

Comes on

HINT:

The inverter water pump assembly operates when the ignition switch is ON (READY).

Related Data List

DTC No.

Data List

P0C7396

  • Inverter Water Pump Revolution
  • Inverter Water Pump Duty Ratio
  • Inverter Coolant Water Temperature

Related Active Test

DTC No.

Active Test

P0C7396

Activate the Inverter Water Pump

MONITOR DESCRIPTION

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

MONITOR STRATEGY

Related DTCs

P0C73 (INF P0C7396): Motor Electronics Coolant Pump "A" malfunction

Required sensors/components

Inverter water pump assembly

Frequency of operation

Continuous

Duration

TMC's intellectual property

MIL operation

1 driving cycle

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored

TMC's intellectual property

Other conditions belong to TMC's intellectual property

-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

Hybrid vehicle control ECU assembly

DTC P0C73 (INF P0C7396) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): UTILITY

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here 2019 - 2022 MY RAV4 HV [02/2019 - 10/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): DTC CHECK / CLEAR 2023 - 2024 MY RAV4 HV [10/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for 2 minutes or more.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. Turn the ignition switch to ON (READY). [*1]
  7. Wait for 2 minutes or more. [*2]

    HINT:

    [*1] to [*2] : Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  8. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  9. Check the DTC judgment result.

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE, perform the normal judgment procedure again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If this vehicle is jump started, etc. and excessive voltage is applied to the auxiliary battery, the inverter water pump assembly may suspend control as a self-protection function and store DTCs.

(When the auxiliary battery voltage returns to normal, the inverter water pump assembly will resume normal operation. In this case it is not necessary to replace the inverter water pump assembly.)

PROCEDURE

1.

CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

P0C7396 only is output, or DTCs except the ones in the table below are also output.

A

Any of the following DTCs including pending DTCs are also output.

B

Malfunction Content

Relevant DTC

Microcomputer malfunction

P060647

Hybrid/EV Powertrain Control Module Processor Watchdog / Safety MCU Failure

P06881F

ECM/PCM Power Relay Sense Circuit Intermittent

Sensor and actuator circuit malfunction

P314A31

Motor Electronics Coolant Pump "A" No Signal

HINT:

P0C7396 may be output as a result of the malfunction indicated by the DTCs above.

  1. The chart above is listed in inspection order of priority.
  2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)

(e) Turn the ignition switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM) 2019 - 2020 MY RAV4 HV [02/2019 - 06/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): DIAGNOSTIC TROUBLE CODE CHART 2020 - 2021 MY RAV4 HV [06/2020 - 12/2021]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): DIAGNOSTIC TROUBLE CODE CHART 2022 - 2024 MY RAV4 HV [12/2021 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): DIAGNOSTIC TROUBLE CODE CHART

A

2.

READ VALUE USING TECHSTREAM (INVERTER WATER PUMP REVOLUTION)

NOTICE:

Be sure to perform the inspection with the auxiliary battery voltage at 12 V or more.

HINT:

  • When the auxiliary battery voltage is low, the inverter water pump assembly may not operate.
  • When the inverter water pump assembly signal line (SWP - IWP) is open or its connection is faulty, the inverter water pump assembly is operated forcibly.

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Enter the following menus: Powertrain / Hybrid Control / Data List / Inverter Water Pump Revolution.

Powertrain > Hybrid Control > Data List

Tester Display

Inverter Water Pump Revolution

(d) According to the display on the Techstream, read the Data List.

OK:

Tester Display

Condition

Specified Condition

Inverter Water Pump Revolution

Ignition switch ON

200 rpm or less

HINT:

When the inverter water pump assembly is not operating, the Data List item "Inverter Water Pump Revolution" displays a value 200 rpm or less.

(e) Turn the ignition switch off.

NG

GO TO STEP 6

OK

3.

CLEAR DTC

Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): P06881F; ECM/PCM Power Relay Sense Circuit Intermittent+

NEXT

4.

PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE INVERTER WATER PUMP)

NOTICE:

  • Make sure that the HV coolant level is above the low line of the inverter reserve tank.
  • Be sure to perform the inspection with the auxiliary battery voltage at 12 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 ignition switch to ON.

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

(d) Select the Data List item "Inverter Water Pump Revolution".

Powertrain > Hybrid Control > Active Test

Active Test Display

Activate the Inverter Water Pump

Data List Display

Inverter Water Pump Revolution

(e) According to the display on the Techstream, perform the Active Test "Activate the Inverter Water Pump" and, check the value of the Data List item "Inverter Water Pump Revolution".

OK:

Tester Display

Condition

Specified Condition

Inverter Water Pump Revolution

Ignition switch ON

During Active Test

3176 to 8617 rpm

HINT:

  • Perform the Active Test with the inverter coolant temperature between -15 and 65°C (5 to 149°F).
  • When the inverter water pump assembly is not operating, the Data List item "Inverter Water Pump Revolution" displays a value 200 rpm or less.

(f) Turn the ignition switch off.

NG

GO TO STEP 6

OK

5.

CHECK HV COOLANT (CHECK FOR CONDITIONS THAT MAY HAVE CAUSED FREEZING)

Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): Cooling System+

Result

Proceed to

Ambient Temperature value is above freezing temperature of the HV coolant.

A

Ambient Temperature value is below freezing temperature of the HV coolant.

B

A

GO TO STEP 12

B

REPLACE HV COOLANT 2019 - 2021 MY RAV4 HV [11/2018 - 12/2021]; HYBRID / BATTERY CONTROL: COOLANT (for Inverter): REPLACEMENT 2022 - 2024 MY RAV4 HV [12/2021 -        ]; HYBRID / BATTERY CONTROL: COOLANT (for Inverter): REPLACEMENT

6.

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

Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): P056014; System Voltage (BATT) Circuit Short to Ground or Open+

NG

CONNECT SECURELY

OK

7.

CHECK CONNECTOR CONNECTION CONDITION (INVERTER WATER PUMP ASSEMBLY CONNECTOR)

Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): Cooling System+

NG

CONNECT SECURELY

OK

8.

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

(a) Disconnect the A29 hybrid vehicle control ECU assembly connector.

(b) Disconnect the A53 inverter water pump assembly connector.

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

Standard Resistance (Check for Open):

Tester Connection

Condition

Specified Condition

A29-34 (IWP) - A53-3 (SWP)

Ignition switch off

Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection

Condition

Specified Condition

A29-34 (IWP) or A53-3 (SWP) - Body ground and other terminals

Ignition switch off

10 kΩ or higher

*a

Front view of wire harness connector

(to Hybrid Vehicle Control ECU Assembly)

*b

Front view of wire harness connector

(to Inverter Water Pump Assembly)

(d) Reconnect the A53 inverter water pump assembly connector.

(e) Reconnect the A29 hybrid vehicle control ECU assembly connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.

READ VALUE USING TECHSTREAM (INVERTER WATER PUMP REVOLUTION)

NOTICE:

Be sure to perform the inspection with the auxiliary battery voltage at 12 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) Remove the INV W/P NO. 2 fuse from No. 1 engine room relay block and junction block assembly.

*1

No. 1 Engine Room Relay Block and Junction Block Assembly

*2

INV W/P NO. 2 Fuse

(c) Turn the ignition switch to ON.

(d) Enter the following menus: Powertrain / Hybrid Control / Data List / Inverter Water Pump Revolution.

Powertrain > Hybrid Control > Data List

Tester Display

Inverter Water Pump Revolution

(e) According to the display on the Techstream, read the Data List.

OK:

Tester Display

Condition

Specified Condition

Inverter Water Pump Revolution

Ignition switch ON

200 rpm or less

(f) Turn the ignition switch off.

(g) Install the INV W/P NO. 2 fuse.

NG

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 2019 MY RAV4 HV [02/2019 - 10/2019]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2020 MY RAV4 HV [10/2019 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2021 MY RAV4 HV [08/2020 - 12/2021]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2022 MY RAV4 HV [12/2021 - 10/2022]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2023 MY RAV4 HV [10/2022 - 10/2023]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2024 MY RAV4 HV [10/2023 -        ]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

OK

10.

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

(a) Disconnect the A29 hybrid vehicle control ECU assembly connector.

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

*1

No. 1 Engine Room Relay Block and Junction Block Assembly

*2

INV W/P Relay Holder

(c) Connect terminals 3 and 5 of the INV W/P relay holder.

HINT:

Make a short circuit between terminals 3 and 5 to supply +B voltage to the inverter water pump.

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

*a

Component with harness connected

(Hybrid Vehicle Control ECU Assembly)

*b

Front view of wire harness connector

(to Hybrid Vehicle Control ECU Assembly)

Standard Voltage:

Tester Connection

Condition

Specified Condition

A29-34 (IWP) - A30-3 (E1)

INV W/P relay holder terminals 3 and 5 connected

Ignition switch off

11 to 14 V

NOTICE:

Make sure to check for and clear DTCs after performing this inspection.

(e) Install the INV W/P relay.

(f) Reconnect the A29 hybrid vehicle control ECU assembly connector.

NG

GO TO STEP 12

OK

11.

CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK WAVEFORM)

(a) Connect an oscilloscope between the hybrid vehicle control ECU assembly terminals specified in the table below.

(b) Turn the ignition switch to ON.

(c) Check the waveform while turning the ignition switch to ON.

*a

Component with harness connected

(Hybrid Vehicle Control ECU Assembly)

-

-

Item

Content

Terminal

A29-34 (IWP) - A30-3 (E1)

Equipment Setting

5 V/DIV., 50 ms./DIV.

Condition

Ignition switch ON

OK:

Waveform duty ratio is between 3% and 9%.

(d) Turn the ignition switch off.

NG

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 2019 MY RAV4 HV [02/2019 - 10/2019]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2020 MY RAV4 HV [10/2019 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2021 MY RAV4 HV [08/2020 - 12/2021]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2022 MY RAV4 HV [12/2021 - 10/2022]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2023 MY RAV4 HV [10/2022 - 10/2023]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2024 MY RAV4 HV [10/2023 -        ]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

OK

12.

REPLACE INVERTER WATER PUMP ASSEMBLY

Click here 2019 - 2024 MY RAV4 HV [11/2018 -        ]; HYBRID / BATTERY CONTROL: WATER PUMP WITH MOTOR: REMOVAL

NEXT

13.

ADD HV COOLANT AND PERFORM AIR BLEEDING

(a) After replacing the inverter water pump assembly, add HV coolant and perform air bleeding.

Click here 2019 - 2021 MY RAV4 HV [11/2018 - 12/2021]; HYBRID / BATTERY CONTROL: COOLANT (for Inverter): REPLACEMENT 2022 - 2024 MY RAV4 HV [12/2021 -        ]; HYBRID / BATTERY CONTROL: COOLANT (for Inverter): REPLACEMENT

NEXT

END