Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001N3Y9
Model Year Start: 2021 Model: Corolla Prod Date Range: [04/2020 - 09/2022]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with P610): P1AC413; Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]

DTC

P1AC413

Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open

DTC SUMMARY

MALFUNCTION DESCRIPTION

Current interrupt devices (CIDs), which mechanically shut off the high-voltage circuit, are installed in each HV battery cell to protect the HV battery from overcharge (overvoltage).

The cause of this malfunction may be one of the following:

Battery ECU assembly internal malfunction

  • Battery ECU assembly malfunction

DESCRIPTION

The hybrid vehicle control ECU detects a shut-off by a CID in a HV battery cell.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P1AC413

Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open

The hybrid vehicle control ECU detects that a CID has operated in the HV battery.

When the power switch is on (READY), the hybrid vehicle control ECU receives a signal indicating a drop in cell voltage from the battery ECU assembly due to the voltage before boosting being out of the normal range or the cumulative change in voltage before boosting is large for a certain amount of time.

(1 trip detection logic)

Battery ECU assembly

Comes on

Master Warning:

Comes on

Related Data List

DTC No.

Data List

P1AC413

  • Hybrid/EV Battery Voltage
  • VL-Voltage before Boosting
  • VH-Voltage after Boosting

MONITOR DESCRIPTION

A malfunction is detected and the MIL is illuminated when following condition is met:

  1. A large fluctuation in the DC/DC converter voltage occurs due to operation of the battery current interrupt device.
  2. A large fluctuation in the battery charger output voltage occurs due to operation of the battery current interrupt device.

MONITOR STRATEGY

Related DTCs

P1AC4 (INF P1AC413): Hybrid/EV Battery Cell Voltage Low Pack1 or Stack "A" at CID interception

Required sensors/components

HV battery

Frequency of operation

-

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

P1AC4 (INF P1AC413) 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 Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with P610): UTILITY

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

    Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with P610): 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. Turn the power switch on (READY) and wait for 3 minutes or more. [*1]

    HINT:

    • According to the display on the Techstream, read the Data List and monitor the values of "Hybrid/EV Battery Voltage" and "VL-Voltage before Boosting" for 3 minutes. If the difference between "Hybrid/EV Battery Voltage" and "VL-Voltage before Boosting" is always less than 50 V, the vehicle has returned to normal.
    • [*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 / Hybrid Control / 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.

CAUTION / NOTICE / HINT

NOTICE:

Do not turn the power switch on (READY) before completing repairs as this may cause a malfunction.

PROCEDURE

1.

CHECK DTC OUTPUT (HYBRID CONTROL, HV BATTERY)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

NOTICE:

If the DTCs are cleared or the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal before performing repairs, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY).

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

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Powertrain > HV Battery > Trouble Codes

Result

Proceed to

P1AC413 only is output, or DTCs except the ones in the table below are also output.

A

DTCs of hybrid battery system in the tables below are output.

B

Malfunction Content

System

Relevant DTC

System malfunction

Hybrid battery system

P1AC413

Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open

P1AC49E

Hybrid/EV Battery Stack 1 Current Interrupt Device Stuck On

P1AC513

Hybrid/EV Battery Stack 2 Current Interrupt Device Circuit Open

P1AC59E

Hybrid/EV Battery Stack 2 Current Interrupt Device Stuck On

HINT:

  • P1AC413 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 power switch off.

B

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

A

2.

CHECK DTC OUTPUT (HYBRID CONTROL, MOTOR GENERATOR AND HV BATTERY)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control, Motor Generator and HV Battery / Trouble Codes.

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Powertrain > Motor Generator > Trouble Codes

Powertrain > HV Battery > Trouble Codes

Result

Proceed to

P1AC413 only is output, or DTCs except the ones in the table below are also output.

A

DTCs of hybrid control system in the tables below are output.

B

DTCs of motor generator control system in the tables below are output.

C

DTCs of hybrid battery system in the tables below are output.

D

Malfunction Content

System

Relevant DTC

Microcomputer malfunction

Hybrid control system

P060647

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

P0A1B49

Drive Motor "A" Control Module Internal Electronic Failure

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

P1C2A1C

Generator A/D Converter Circuit Circuit Voltage Out of Range

P1C2A49

Generator A/D Converter Circuit Internal Electronic Failure

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

Hybrid battery system

P060A47

Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure

P060B16

Hybrid/EV Battery Energy Control Module A/D Processing Circuit Voltage Below Threshold

P060B49

Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure

Power source circuit malfunction

Motor generator control system

P06D61C

Generator Control Module Offset Power Circuit Voltage Out of Range

Hybrid battery system

P1CBB12

Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Auxiliary Battery

P1CBB14

Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Ground or Open

Communication system malfunction

Hybrid control system

P312387

Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message

U011187

Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message

Motor generator control system

P313387

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

Hybrid battery system

P060687

Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message

P060A87

Hybrid/EV Battery Energy Control Module Processor from Monitoring Processor Missing Message

Sensor and actuator circuit malfunction

Motor generator control system

P0D2D16

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

P0D2D17

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

Hybrid battery system

P0ABF11

Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground

P0ABF15

Hybrid/EV Battery Current Sensor "A" Circuit Short to Auxiliary Battery or Open

P0ABF28

Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure

P0ABF2A

Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range

P0B0E11

Hybrid/EV Battery Current Sensor "B" Circuit Short to Ground

P0B0E15

Hybrid/EV Battery Current Sensor "B" Circuit Short to Auxiliary Battery or Open

P0B1362

Hybrid/EV Battery Current Sensor "A"/"B" Signal Compare Failure

System malfunction

Hybrid control system

P0A1F94

Hybrid/EV Battery Energy Control Module Unexpected Operation

P0ABF00

Hybrid/EV Battery Current Sensor "A" Circuit Range/Performance

P0D2D1C

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

P0D4C1C

Hybrid/EV Battery Charger Hybrid/EV Battery Input 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

P1C8349

High Voltage Power Resource Circuit Voltage Sensor after Boosting Malfunction

Motor generator control system

P0CA300

DC/DC Converter Step Up Voltage Performance

P1CB69E

Drive Motor "A" Inverter Voltage Sensor(VH) Stuck On

HINT:

  • P1AC413 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 power switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

C

GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM)

D

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

A

3.

REPLACE BATTERY ECU ASSEMBLY

Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: BATTERY ECU (for LITHIUM-ION BATTERY): REMOVAL

NEXT

4.

SIMULATION TEST

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG) and turn the Techstream on.

NOTICE:

Do not turn the power switch on (READY) before completing repairs as this may cause a malfunction.

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

(d) Clear the DTCs and freeze frame data.

Powertrain > Hybrid Control > Clear DTCs

(e) Turn the power switch off and wait for 2 minutes or more.

(f) Turn the power switch on (IG) and wait for 30 seconds or more.

(g) Enter the following menus: Powertrain / Hybrid Control, HV Battery / Trouble Codes.

(h) Check if DTCs are output.

Powertrain > Hybrid Control > Trouble Codes

Powertrain > HV Battery > Trouble Codes

Result

Proceed to

No DTCs are output.

A

DTCs of hybrid battery system are output.

B

(i) Turn the power switch off.

A

END

B

GO TO DTC CHART (HYBRID BATTERY SYSTEM)