Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Hybrid/EV Battery Cooling Fan 1 Component Internal Failure (P0A8196,P0A8198)

Toyota Corolla Cross (2022-2024) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Battery System / Hybrid/EV Battery Cooling Fan 1 Component Internal Failure (P0A8196,P0A8198)

DESCRIPTION

Refer to the description for DTC P0A8111.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

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)
  • Wire harness or connector
  • Battery cooling blower assembly
  • Battery ECU assembly
  • No. 1 HV battery intake filter
  • No. 1 hybrid battery intake duct

Comes on

Master Warning:

Comes on

SAE Code: P0A82

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)
  • Wire harness or connector
  • Battery cooling blower assembly
  • Battery ECU assembly
  • No. 1 HV battery intake filter
  • No. 1 hybrid battery intake duct

Comes on

Master Warning:

Comes on

SAE Code: P0A82

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 battery ECU assembly 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

1 driving cycle / 2 driving cycles

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

Battery ECU assembly

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

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

    Click here

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for 2 minutes or more.
  5. Turn the ignition switch to ON (READY) and turn the GTS on.
  6. Enter the following menus: Powertrain / HV Battery / 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 / HV Battery / 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, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A8111.

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

PROCEDURE

1.

CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

(a) Check for DTCs.

Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

P0A8196 or P0A8198 only is output, or DTCs except the ones in the table below are also output.

A

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

B

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

C

System

Relevant DTC

Hybrid battery system

P060A47

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

P060B49

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

P060687

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

Hybrid control system

P0A1F94

Hybrid/EV Battery Energy Control Module Unexpected Operation

(b) Turn the ignition switch off.

B

GO TO DTC CHART (HYBRID BATTERY SYSTEM)
C

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

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 ignition switch to ON (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Check that 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.

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.

*1

No. 1 HV Battery Intake Filter

*2

Battery Cooling Blower Assembly

*3

No. 1 Hybrid Battery Intake Duct
NG

CORRECT THE PROBLEM
OK

3.

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

Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

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

Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

CHECK BATTERY ECU ASSEMBLY (GROUND SHORT CHECK)

(a) Remove the battery ECU assembly.

Click here

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O211-14 (SI0) - O211-10 (GND)

Ignition switch off

10 kΩ or higher

*a

Component without harness connected

(Battery ECU Assembly)

(c) Install the battery ECU assembly.

NG

REPLACE BATTERY ECU ASSEMBLY

OK

6.

READ VALUE USING GTS (HYBRID/EV BATTERY COOLING FAN 1 FREQUENCY)

Click here

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 ECU assembly connector are 0 Hz.

A

Other than above

B
B

GO TO STEP 8

A

7.

CHECK BATTERY ECU ASSEMBLY

Click here

OK

REPLACE BATTERY COOLING BLOWER ASSEMBLY

NG

REPLACE BATTERY ECU ASSEMBLY

8.

CHECK BATTERY ECU ASSEMBLY (FREQUENCY)

Click here

OK

REPLACE BATTERY COOLING BLOWER ASSEMBLY

NG

REPLACE BATTERY ECU ASSEMBLY

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