Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM1000000026QHT
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): P0BF128,...,P0BF928; Drive Motor "B" Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure; 2023 - 2025 MY Corolla HV [09/2022 -        ]

DTC

P0BF128

Drive Motor "B" Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure

DTC

P0BF528

Drive Motor "B" Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure

DTC

P0BF928

Drive Motor "B" Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure

DTC SUMMARY

MALFUNCTION DESCRIPTION

These DTCs indicate that the current sensor value is abnormal. The cause of this malfunction may be one of the following:

Inverter internal malfunction

  • Current sensor malfunction
  • Inverter with converter assembly internal circuit malfunction

DESCRIPTION

The motor generator control ECU (MG ECU), which is built into the inverter with inverter with converter assembly, monitors the rear motor inverter current sensor. These DTCs indicate the malfunction of current sensors and do not indicate a malfunction of the high-voltage system.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P0BF128

Drive Motor "B" Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure

Rear motor inverter current sensor U phase offset malfunction:

The absolute value of the current sensor output exceeds the threshold when current should not flow, such as when the rear motor inverter is shutdown.

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

Comes on

Master Warning:

Comes on

SAE Code:

P0BF2

P0BF528

Drive Motor "B" Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure

Rear motor inverter current sensor V phase offset malfunction:

The absolute value of the current sensor output exceeds the threshold when current should not flow, such as when the rear motor inverter is shutdown.

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

Comes on

Master Warning:

Comes on

SAE Code:

P0BF6

P0BF928

Drive Motor "B" Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure

Rear motor inverter current sensor W phase offset malfunction:

The absolute value of the current sensor output exceeds the threshold when current should not flow, such as when the rear motor inverter is shutdown.

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

Comes on

Master Warning:

Comes on

SAE Code:

P0BFA

MONITOR DESCRIPTION

If the motor generator control ECU detects a rear motor inverter current sensor U, V or W phase offset malfunction, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0BF2 (INF P0BF128): Offset malfunction

P0BF6 (INF P0BF528): Offset malfunction

P0BFA (INF P0BF928): Offset malfunction

Required sensors/components

Rear motor inverter Phase U Current Sensor

Rear motor inverter Phase V Current Sensor

Rear motor inverter Phase W Current Sensor

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

Motor generator control ECU

DTC P0BF2 (INF P0BF128) is not detected

DTC P0BF6 (INF P0BF528) is not detected

DTC P0BFA (INF P0BF928) 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 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): UTILITY

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

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

  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. [*1]
  4. Turn the ignition switch to ON (READY) with the shift lever in P and wait for 5 seconds 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.

  5. Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.
  6. 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.

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:

P0BF128, P0BF528 or P0BF928 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.)

Table 1

Malfunction Content

System

Relevant DTC

Insulation malfunction

Hybrid control system

P1C7C49

Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure

P1C7D49

Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure

P1C7E49

Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure

P1C7F49

Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure

P1C8049

Hybrid/EV Battery Voltage System Isolation (Rear Motor Area) Internal Electronic Failure

High voltage system malfunction

Hybrid control system

P0AA649

Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure

Table 2

Malfunction Content

System

Relevant DTC

Microcomputer malfunction

Motor generator control system

P0A1B47

Drive Motor "A" Control Module Watchdog / Safety MC Failure

P0A1C47

Drive Motor "B" Control Module Watchdog / Safety MCU Failure

P0A1C49

Drive Motor "B" Control Module Internal Electronic Failure

P1C2B1C

Drive Motor "A" Control Module A/D Converter Circuit Voltage Out of Range

P1C2B49

Drive Motor "A" Control Module A/D Converter Circuit Internal Electronic Failure

P1C2B71

Drive Motor "A" Control Module A/D Converter Circuit Actuator Stuck

P1C2C1C

Drive Motor "B" Control Module AD Converter Circuit Voltage Out of Range

P1C2C49

Drive Motor "B" Control Module AD Converter Internal Electronic Failure

P1C2C71

Drive Motor "B" Control Module A/D Converter Circuit Actuator Stuck

P310B83

Communication Error from Drive Motor "A" to Drive Motor "B" Value of Signal Protection Calculation Incorrect

P310B86

Communication Error from Drive Motor "A" to Drive Motor "B" Signal (Some Circuit Quantity, Reported via Serial Data) Invalid

P310B87

Communication Error from Drive Motor "A" to Drive Motor "B" Missing Message

Hybrid control system

P0A1B49

Drive Motor "A" Control Module Internal Electronic Failure

Power source circuit malfunction

Motor generator control system

P06B31C

Drive Motor "B" Control Module Position Sensor REF Power Source Circuit Voltage Out of Range

P19F91C

Drive Motor "B" Control Module Offset Power Circuit Voltage Out of Range

Communication malfunction

Motor generator control system

U11B387

Lost Communication with Hybrid/EV Powertrain Control Module (ch5) Missing Message

Sensor and actuator circuit malfunction

Motor generator control system

P0A4516

Drive Motor "B" Position Sensor Circuit Voltage Below Threshold

P0A4521

Drive Motor "B" Position Sensor Signal Amplitude < Minimum

P0A4522

Drive Motor "B" Position Sensor Signal Amplitude > Maximum

P0C5513

Drive Motor "B" Position Sensor Circuit "A" Circuit Open

P0C5516

Drive Motor "B" Position Sensor Circuit "A" Circuit Voltage Below Threshold

P0C5517

Drive Motor "B" Position Sensor Circuit "A" Circuit Voltage Above Threshold

P0C5F13

Drive Motor "B" Position Sensor Circuit "B" Circuit Open

P0C5F16

Drive Motor "B" Position Sensor Circuit "B" Circuit Voltage Below Threshold

P0C5F17

Drive Motor "B" Position Sensor Circuit "B" Circuit Voltage Above Threshold

P0D2D16

Drive Motor "A" Inverter Voltage Sensor(VH) Circuit Voltage Below Threshold

P0D2D17

Drive Motor "A" Inverter Voltage Sensor(VH) Circuit Voltage Above Threshold

P1CAE49

Drive Motor "B" Position Sensor Internal Electronic Failure

P1CB138

Drive Motor "B" Position Sensor REF Signal Frequency Incorrect

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