Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GCMT
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0A8196,P0A8198; Hybrid/EV Battery Cooling Fan 1 Component Internal Failure; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

P0A8196

Hybrid/EV Battery Cooling Fan 1 Component Internal Failure

DTC

P0A8198

Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature

DESCRIPTION

Refer to the description for DTC P0A8111.

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0A8111,P0A814B; Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0A8196

Hybrid/EV Battery Cooling Fan 1 Component Internal Failure

The battery cooling blower assembly is malfunctioning and the actual speed is not within the specified range of the target speed calculated by the ECU.*

*: This DTC is not stored when "Hybrid/EV Battery Cooling Fan 1 Frequency" is excessively low or high.

(2 trip detection logic)

  • Battery cooling blower assembly
  • Battery voltage sensor
  • Hybrid vehicle control ECU
  • No. 1 HV battery intake filter
  • No. 1 Hybrid battery intake duct
  • Wire harness or connector

Comes on

Master Warning: Comes on

P0A8198

Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature

The HV battery temperature is high and the battery cooling blower assembly is malfunctioning and the actual speed is not within the specified range of the target speed calculated by the ECU.*

*: This DTC is not stored when "Hybrid/EV Battery Cooling Fan 1 Frequency" is excessively low or high.

(1 trip detection logic)

  • Battery cooling blower assembly
  • Battery voltage sensor
  • Hybrid vehicle control ECU
  • No. 1 HV battery intake filter
  • No. 1 Hybrid battery intake duct
  • Wire harness or connector

Comes on

Master Warning: Comes on

Related Data List

DTC No.

Data List

P0A8196

  • Hybrid/EV Battery Cooling Fan 1 Drive Request
  • Hybrid/EV Battery Cooling Fan 1 Drive Status
  • Hybrid/EV Battery Cooling Fan 1 Frequency

P0A8198

The following items can be helpful when performing repairs:

Data List

  • Hybrid/EV Battery Temperature 1 to 3
  • BATT Voltage

HINT:

"Hybrid/EV Battery Cooling Fan 1 Frequency" is detected when the battery cooling blower assembly is operating and its value changes in proportion to the battery cooling blower assembly rotation speed.

MONITOR DESCRIPTION

If the hybrid vehicle control ECU detects that the speed of the battery cooling blower assembly is outside the normal operating range, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0A82 (INF P0A8196): Hybrid/EV Battery Cooling Fan 1 Component Internal Failure

P0A82 (INF P0A8198): Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature

Required sensors/components

Battery cooling blower assembly

Frequency of operation

Continuous

Duration

TMC's intellectual property

MIL operation

2 driving cycle / 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

DTC P0A82 (INF P0A8196) is not detected

DTC P0A82 (INF P0A8198) 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 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): UTILITY

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

    Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE 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 (READY) and turn the Techstream on.
  6. Enter the following menus: Powertrain / Hybrid Control / Active Test / Control the Hybrid/EV Battery Cooling Fan.[*1]
  7. Operate the battery cooling blower assembly in each fan mode, 1 through 6, for 60 seconds or more.[*2]

    HINT:

    • Operation of the battery cooling blower assembly can be confirmed by checking if air is sucked into the air intake port of the intake duct.
    • [*1] to [*2]: Normal judgment procedure.

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

  8. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  9. 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.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A8111.

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0A8111,P0A814B; Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground+

CAUTION / NOTICE / HINT

CAUTION:

  • Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
    • Inspecting the high-voltage system
    • Disconnecting the low voltage connector of the inverter with converter assembly
    • Disconnecting the low voltage connector of the HV battery
  • To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
  • After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
  • After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): PRECAUTION

    *a

    Without waiting for 10 minutes

    HINT:

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

NOTICE:

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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PROCEDURE

1.

CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

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

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

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

P0AFC00 or P0AFC96 is not output.

A

P0AFC00 or P0AFC96 is output.

B

(e) Turn the power switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM) 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): DIAGNOSTIC TROUBLE CODE CHART 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): DIAGNOSTIC TROUBLE CODE CHART

A

2.

CHECK DUCT AND BLOWER

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Remove the rear seat cushion assembly.

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; SEAT: REAR SEAT ASSEMBLY: REMOVAL+

(c) Check that the No. 1 HV battery intake filter, battery cooling blower assembly and No. 1 hybrid battery intake duct are not disconnected, damaged, or clogged with foreign matter.

*1

No. 1 HV Battery Intake Filter

*2

Battery Cooling Blower Assembly

*3

No. 1 Hybrid Battery Intake Duct

-

-

OK:

The No. 1 HV battery intake filter, No. 1 hybrid battery intake duct and battery cooling blower assembly blower are not disconnected, damaged, or clogged with foreign matter.

(d) Install the rear seat cushion assembly.

NG

CORRECT THE PROBLEM

OK

3.

CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - BATTERY COOLING BLOWER ASSEMBLY)

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0A8111,P0A814B; Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground+

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY COOLING BLOWER ASSEMBLY)

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0A8111,P0A814B; Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground+

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK HYBRID VEHICLE CONTROL ECU (GROUND SHORT CHECK)

(a) Remove the hybrid vehicle control ECU.

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

(b) Measure the resistance according to the value(s) in the table below.

*a

Component without harness connected

(Hybrid Vehicle Control ECU)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

I2-38 (SI0) - I2-12 (E01)

Power switch off

10 kΩ or higher

I2-38 (SI0) - I2-11 (E02)

Power switch off

10 kΩ or higher

(c) Install the hybrid vehicle control ECU.

NG

REPLACE HYBRID VEHICLE CONTROL ECU 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

OK

6.

READ VALUE USING TECHSTREAM (COOLING FAN FREQUENCY)

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0A8111,P0A814B; Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground+

Result

Proceed to

Both of the value in the Data List (Hybrid/EV Battery Cooling Fan 1 Frequency) and the actual measured value at the battery voltage sensor connector are 0 Hz.

A

Other than above

B

B

GO TO STEP 8

A

7.

CHECK BATTERY VOLTAGE SENSOR

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0A8111,P0A814B; Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground+

OK

REPLACE BATTERY COOLING BLOWER ASSEMBLY 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: BATTERY BLOWER: REMOVAL 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: BATTERY BLOWER: REMOVAL

NG

REPLACE BATTERY VOLTAGE SENSOR

8.

CHECK BATTERY VOLTAGE SENSOR (FREQUENCY)

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P0A8111,P0A814B; Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground+

OK

REPLACE BATTERY COOLING BLOWER ASSEMBLY 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; HYBRID / BATTERY CONTROL: BATTERY BLOWER: REMOVAL 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: BATTERY BLOWER: REMOVAL

NG

REPLACE BATTERY VOLTAGE SENSOR