Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001RHF3
Model Year Start: 2021 Model: Avalon HV Prod Date Range: [08/2020 -           ]
Title: HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY): P0C3811,P0C3815,P0C3D11,P0C3D15; DC/DC Converter Temperature Sensor "A" Circuit Short to Ground; 2021 - 2022 MY Avalon HV [08/2020 -        ]

DTC

P0C3811

DC/DC Converter Temperature Sensor "A" Circuit Short to Ground

DTC

P0C3815

DC/DC Converter Temperature Sensor "A" Circuit Short to Battery or Open

DTC

P0C3D11

DC/DC Converter Temperature Sensor "B" Circuit Short to Ground

DTC

P0C3D15

DC/DC Converter Temperature Sensor "B" Circuit Short to Battery or Open

DESCRIPTION

The motor generator control ECU (MG ECU) located in the inverter with converter assembly detects the temperature of the boost converter using the temperature sensor built into the boost converter. The motor generator control ECU (MG ECU) detects malfunctions in the boost converter temperature sensor and its wiring.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0C3811

DC/DC Converter Temperature Sensor "A" Circuit Short to Ground

Short to ground detected in boost converter temperature sensor (upper) signal circuit

(1 trip detection logic)

Inverter with converter assembly

Comes on

Master Warning Light:

Comes on

P0C3815

DC/DC Converter Temperature Sensor "A" Circuit Short to Battery or Open

Open or short to +B detected in boost converter temperature sensor (upper) signal circuit

(1 trip detection logic)

Inverter with converter assembly

Comes on

Master Warning Light:

Comes on

P0C3D11

DC/DC Converter Temperature Sensor "B" Circuit Short to Ground

Short to ground detected in boost converter temperature sensor (lower) signal circuit

(1 trip detection logic)

Inverter with converter assembly

Comes on

Master Warning Light:

Comes on

P0C3D15

DC/DC Converter Temperature Sensor "B" Circuit Short to Battery or Open

Open or short to +B detected in boost converter temperature sensor (lower) signal circuit

(1 trip detection logic)

Inverter with converter assembly

Comes on

Master Warning Light:

Comes on

Related Data List

DTC No.

Data List

P0C3811

Boosting Converter Temperature (Upper)

P0C3815

P0C3D11

Boosting Converter Temperature 1 (Lower)

P0C3D15

MONITOR DESCRIPTION

If the motor generator control ECU detects a malfunction in the boost converter temperature sensor circuit, the motor generator control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0C3A (INF P0C3811): DC/DC Converter Temperature Sensor "A" Range check

P0C3B (INF P0C3815): DC/DC Converter Temperature Sensor "A" Range check

P0C3F (INF P0C3D11): DC/DC Converter Temperature Sensor "B" Range check

P0C40 (INF P0C3D15): DC/DC Converter Temperature Sensor "B" Range check

Required sensors/components

DC/DC converter temperature sensor

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 stored

TMC's intellectual property

Other conditions belong to TMC's intellectual property

-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

Motor generator control ECU

DTC P0C3A (INF P0C3811) is not detected

DTC P0C3B (INF P0C3815) is not detected

DTC P0C3F (INF P0C3D11) is not detected

DTC P0C40 (INF P0C3D15) 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 2021 - 2022 MY Avalon HV [08/2020 -        ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY): UTILITY

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

    Click here 2021 - 2022 MY Avalon HV [08/2020 -        ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY): DTC CHECK / CLEAR

  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 2 minutes or more.
  5. Turn the power switch on (IG) and turn the Techstream on.
  6. With power switch on (IG) and wait for 5 seconds or more. [*1]

    HINT:

    [*1]: Normal judgment procedure.

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

  7. Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.
  8. 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 or N/A, perform the normal judgment procedure again.

PROCEDURE

1.

REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS

Click here 2021 - 2022 MY Avalon HV [08/2020 -        ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY): DTC CHECK / CLEAR

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COMPLETED