Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026QHL
Model Year Start: 2023 Model: Corolla HV Prod Date Range: [09/2022 -           ]
Title: HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P0A6912,...,P0A6C1F; Drive Motor "B" Phase V Current(High Resolution) Circuit Short to Battery; 2023 - 2025 MY Corolla HV [09/2022 -        ]

DTC

P0A6912

Drive Motor "B" Phase V Current(High Resolution) Circuit Short to Battery

DTC

P0A6914

Drive Motor "B" Phase V Current(High Resolution) Circuit Short to Ground or Open

DTC

P0A691C

Drive Motor "B" Phase V Current(High Resolution) Circuit Voltage Out of Range

DTC

P0A691F

Drive Motor "B" Phase V Current(High Resolution) Circuit Intermittent

DTC

P0A6C12

Drive Motor "B" Phase W Current(High Resolution) Circuit Short to Battery

DTC

P0A6C14

Drive Motor "B" Phase W Current(High Resolution) Circuit Short to Ground or Open

DTC

P0A6C1C

Drive Motor "B" Phase W Current(High Resolution) Circuit Voltage Out of Range

DTC

P0A6C1F

Drive Motor "B" Phase W Current(High Resolution) Circuit Intermittent

DESCRIPTION

The motor generator control ECU (MG ECU), which is built into the inverter with converter assembly, monitors its internal operation and will store DTCs if it detects a malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P0A6912

Drive Motor "B" Phase V Current(High Resolution) Circuit Short to Battery

Rear motor inverter phase V current sensor high resolution signal circuit (short to +B)

(1 trip detection logic)
  • Inverter with converter assembly
  • Wire harness or connector

Does not come on

Master Warning:

Comes on

SAE Code:

P0A6B

P0A6914

Drive Motor "B" Phase V Current(High Resolution) Circuit Short to Ground or Open

Rear motor inverter phase V current sensor high resolution signal circuit (short to ground or open)

(1 trip detection logic)
  • Inverter with converter assembly
  • Wire harness or connector

Does not come on

Master Warning:

Comes on

SAE Code:

P0A6A

P0A691C

Drive Motor "B" Phase V Current(High Resolution) Circuit Voltage Out of Range

Rear motor inverter phase V current sensor high resolution signal circuit (out of range)

(1 trip detection logic)
  • Inverter with converter assembly
  • Wire harness or connector

Does not come on

Master Warning:

Comes on

SAE Code:

P1C38

P0A691F

Drive Motor "B" Phase V Current(High Resolution) Circuit Intermittent

Out of range detected in rear motor inverter phase V current sensor when P0C7917, P0E5717, P0D3319, P1C5D19, P1C5F19 or P1C5E19 is stored.

(1 trip detection logic)
  • Inverter with converter assembly
  • Wire harness or connector

Does not come on

Master Warning:

Does not come on

SAE Code:

P1C39

P0A6C12

Drive Motor "B" Phase W Current(High Resolution) Circuit Short to Battery

Rear motor inverter phase W current sensor high resolution signal circuit (short to +B)

(1 trip detection logic)
  • Inverter with converter assembly
  • Wire harness or connector

Does not come on

Master Warning:

Comes on

SAE Code:

P0A6E

P0A6C14

Drive Motor "B" Phase W Current(High Resolution) Circuit Short to Ground or Open

Rear motor inverter phase W current sensor high resolution signal circuit (short to ground or open)

(1 trip detection logic)
  • Inverter with converter assembly
  • Wire harness or connector

Does not come on

Master Warning:

Comes on

SAE Code:

P0A6D

P0A6C1C

Drive Motor "B" Phase W Current(High Resolution) Circuit Voltage Out of Range

Rear motor inverter phase W current sensor high resolution signal circuit (out of range)

(1 trip detection logic)
  • Inverter with converter assembly
  • Wire harness or connector

Does not come on

Master Warning:

Comes on

SAE Code:

P1C3A

P0A6C1F

Drive Motor "B" Phase W Current(High Resolution) Circuit Intermittent

Out of range detected in rear motor inverter phase W current sensor when P0C7917, P0E5717, P0D3319, P1C5D19, P1C5F19 or P1C5E19 is stored.

(1 trip detection logic)
  • Inverter with converter assembly
  • Wire harness or connector

Does not come on

Master Warning:

Does not come on

SAE Code:

P1C3B

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 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): UTILITY

  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch off and wait for 2 minutes or more.
  3. Turn the ignition switch to ON and wait for 5 seconds or more.
  4. Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.
  5. 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 driving pattern again.

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): PRECAUTION

NOTICE:

  • After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: BEFORE DISCONNECTING BATTERY

  • When disconnecting and reconnecting the auxiliary battery

    HINT:

    When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

    Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART

HINT:

P0A6912, P0A6914, P0A691C, P0A691F, P0A6C12, P0A6C14, P0A6C1C or P0A6C1F may be output as a result of the malfunctions indicated by the DTCs in table below.

  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.)

Malfunction Content

System

Relevant DTC

Power source circuit malfunction

Motor generator control system

P06B01C

Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range

P06D61C

Generator Control Module Offset Power Circuit Voltage Out of Range

System malfunction

Motor generator control system

P0A7973

Drive Motor "B" Inverter Actuator Stuck Closed

PROCEDURE

1.

CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P033500,P033531; Crankshaft Position Sensor "A"+

Result

Proceed to

OK

A

NG (The connector is not connected securely.)

B

NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.)

C
A

REPLACE INVERTER WITH CONVERTER ASSEMBLY

B

CONNECT SECURELY
C

REPAIR OR REPLACE HARNESS OR CONNECTOR