Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Generator Inverter Actuator Stuck Open (P0A7A72)

DTC SUMMARY

MALFUNCTION DESCRIPTION

This DTC indicates that current does not flow as commanded due to a generator output circuit malfunction. The cause of this malfunction may be one of the following:

Internal inverter malfunction
  • Inverter with converter assembly internal circuit malfunction
Inverter low-voltage circuit malfunction
  • The connectors are not connected properly

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P0A7A72

Generator Inverter Actuator Stuck Open

Malfunction is detected when offset component occurs in current flowing through generator with one phase open malfunction

(1 trip detection logic)

  • Inverter with converter assembly
  • Motor cable
  • Hybrid vehicle transaxle assembly
  • Wire harness or connector

Comes on

Master Warning:

Comes on

SAE Code:

P0A7A

MONITOR DESCRIPTION

The motor generator control ECU monitors the generator. If the motor generator control ECU detects a malfunction of the generator, the ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0A7A (INF:P0A7A72): Open circuit malfunction

Required sensors/components

Generator Inverter

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 P0A7A (INF P0A7A72) 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

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

    Click here

  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. Apply the parking brake and secure the wheels using chocks.

    NOTICE:

    Perform this test with the AUTO function (shift-linked function) of the electric parking brake system off.

    HINT:

    When the parking brake indicator (red) is illuminated after the electric parking brake switch assembly has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch assembly is pulled to the lock side one more time.

  4. Turn the ignition switch to ON (READY). [*1]
  5. Move the shift lever to D, and then firmly depress the brake pedal while fully depressing the accelerator pedal. Keep the brake pedal and accelerator pedal pressed for approximately 5 seconds. [*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.

  6. Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.
  7. 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

Refer to the wiring diagram for the Generator High-voltage Circuit.

Click here

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here

NOTICE:

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

    Click here

  • 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

HINT:

  • P0A7A72 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

System main relay or high voltage circuit malfunction

Hybrid control system

P0AD911

Hybrid/EV Battery Positive Contactor Circuit Short to Ground

P0AD915

Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open

P0ADD11

Hybrid/EV Battery Negative Contactor Circuit Short to Ground

P0ADD15

Hybrid/EV Battery Negative Contactor Circuit Short to Auxiliary Battery or Open

P1C8449

High Voltage Power Resource Circuit Short during Ready ON

Table 2

Malfunction Content

System

Relevant DTC

Microcomputer malfunction

Motor generator control system

P0A1A47

Generator Control Module Watchdog / Safety MC Failure

P0A1A49

Generator Control Module Internal Electronic Failure

P0A1B1F

Generator Control Module Circuit Intermittent

P0A1C47

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

P0A1C49

Drive Motor "B" Control Module Internal Electronic Failure

P1C2A1C

Generator A/D Converter Circuit Circuit Voltage Out of Range

P1C2A49

Generator A/D Converter Circuit Internal Electronic Failure

P1C2A71

Generator A/D Converter Circuit Actuator Stuck

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

P310A83

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

P310A86

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

P310A87

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

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

P313383

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

P313386

Communication Error from Generator to Drive Motor "A" Signal Invalid

P313387

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

P313483

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

P313486

Communication Error from Drive Motor "A" to Generator Signal Invalid

P313487

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

P32BF83

Lost Communication between Drive Motor "A" and "B" (Drive Motor "A") Value of Signal Protection Calculation Incorrect

P32BF86

Lost Communication between Drive Motor "A" and "B" (Drive Motor "A") Signal (Some Circuit Quantity, Reported via Serial Data) Invalid

P32BF87

Lost Communication between Drive Motor "A" and "B" (Drive Motor "A") Missing Message

P32CF83

Lost Communication between Drive Motor "A" and "B" (Drive Motor "B") Value of Signal Protection Calculation Incorrect

P32CF86

Lost Communication between Drive Motor "A" and "B" (Drive Motor "B") Signal (Some Circuit Quantity, Reported via Serial Data) Invalid

P32CF87

Lost Communication between Drive Motor "A" and "B" (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

P06B01C

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

P06B31C

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

P06D61C

Generator Control Module Offset Power Circuit Voltage Out of Range

P19F81C

Generator Control Module Offset Power Circuit Voltage Out of Range

P19F91C

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

P26DF1C

Generator Control Module Position Sensor REF Power Source 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

P0A3F16

Drive Motor "A" Position Sensor Circuit Voltage Below Threshold

P0A3F21

Drive Motor "A" Position Sensor Signal Amplitude < Minimum

P0A3F22

Drive Motor "A" Position Sensor Signal Amplitude > Maximum

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

P0A4B16

Generator Position Sensor Circuit Voltage Below Threshold

P0A4B21

Generator Position Sensor Signal Amplitude < Minimum

P0A4B22

Generator Position Sensor Signal Amplitude > Maximum

P0A6012

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

P0A6014

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

P0A601C

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

P0A6312

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

P0A6314

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

P0A631C

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

P0A6912

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

P0A6914

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

P0A691C

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

P0A6C12

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

P0A6C14

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

P0A6C1C

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

P0BE512

Drive Motor "A" Phase U Current Sensor Circuit Short to Battery

P0BE514

Drive Motor "A" Phase U Current Sensor Circuit Short to Ground or Open

P0BE528

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

P0BE912

Drive Motor "A" Phase V Current Sensor Circuit Short to Battery

P0BE914

Drive Motor "A" Phase V Current Sensor Circuit Short to Ground or Open

P0BE928

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

P0BED12

Drive Motor "A" Phase W Current Sensor Circuit Short to Battery

P0BED14

Drive Motor "A" Phase W Current Sensor Circuit Short to Ground or Open

P0BED28

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

P0BF112

Drive Motor "B" Phase U Current Sensor Circuit Short to Battery

P0BF114

Drive Motor "B" Phase U Current Sensor Circuit Short to Ground or Open

P0BF128

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

P0BF512

Drive Motor "B" Phase V Current Sensor Circuit Short to Battery

P0BF514

Drive Motor "B" Phase V Current Sensor Circuit Short to Ground or Open

P0BF528

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

P0BF912

Drive Motor "B" Phase W Current Sensor Circuit Short to Battery

P0BF914

Drive Motor "B" Phase W Current Sensor Circuit Short to Ground or Open

P0BF928

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

P0BFD62

Drive Motor "A" Phase U-V-W Current Sensor Signal Compare Failure

P0BFE62

Drive Motor "B" Phase U-V-W Current Sensor Signal Compare Failure

P0C5013

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

P0C5016

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

P0C5017

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

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

P0C5A13

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

P0C5A16

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

P0C5A17

Drive Motor "A" Position Sensor Circuit "B" 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

P0C6413

Generator Position Sensor Circuit "A" Circuit Open

P0C6416

Generator Position Sensor Circuit "A" Circuit Voltage Below Threshold

P0C6417

Generator Position Sensor Circuit "A" Circuit Voltage Above Threshold

P0C6913

Generator Position Sensor Circuit "B" Circuit Open

P0C6916

Generator Position Sensor Circuit "B" Circuit Voltage Below Threshold

P0C6917

Generator 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

P0DFA62

Generator Phase U-V-W Current Sensor Signal Compare Failure

P0E0012

Generator Phase U Current Sensor Circuit Short to Battery

P0E0014

Generator Phase U Current Sensor Circuit Short to Ground or Open

P0E0028

Generator Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure

P0E0412

Generator Phase V Current Sensor Circuit Short to Battery

P0E0414

Generator Phase V Current Sensor Circuit Short to Ground or Open

P0E0428

Generator Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure

P0E0812

Generator Phase W Current Sensor Circuit Short to Battery

P0E0814

Generator Phase W Current Sensor Circuit Short to Ground or Open

P0E0828

Generator Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure

P0E3116

DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Below Threshold

P0E3117

DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold

P0E5111

DC/DC Converter Current Sensor Circuit Short to Ground

P0E5115

DC/DC Converter Current Sensor Circuit Short to Battery or Open

P0E512A

DC/DC Converter Current Sensor Signal Stuck In Range

P1CAC49

Generator Position Sensor Internal Electronic Failure

P1CAD49

Drive Motor "A" Position Sensor Internal Electronic Failure

P1CAE49

Drive Motor "B" Position Sensor Internal Electronic Failure

P1CAF38

Generator Position Sensor REF Signal Cycle Malfunction Signal Frequency Incorrect

P1CB038

Drive Motor "A" Position Sensor REF Signal Frequency Incorrect

P1CB138

Drive Motor "B" Position Sensor REF Signal Frequency Incorrect

P1CFF62

Hybrid/EV Battery Current/DC/DC Converte rCurrent Signal Compare Failure

Hybrid control system

P0C7600

Hybrid/EV Battery System Discharge Time Too Long

P0D2D1C

Drive Motor "A" Inverter Voltage Sensor Voltage Out of Range

P0E311C

Boosting Converter Voltage Sensor "A" Voltage Out of Range

P1C2D62

Hybrid/EV Battery "A" Voltage Sensor/Boosting Converter Voltage Sensor "A" Signal Compare Failure

PROCEDURE

1.

CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)

Click here

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

B

CONNECT SECURELY

C

REPAIR OR REPLACE HARNESS OR CONNECTOR

A

2.

CHECK GENERATOR HIGH-VOLTAGE CIRCUIT

Click here

HINT:

If the "Generator High-voltage Circuit" inspection results are normal, perform the next step.

NEXT

REPLACE INVERTER WITH CONVERTER ASSEMBLY

    READ NEXT:

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