Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Hybrid/EV Battery Cooling Fan 1 Control Circuit High (P0A8100,P0A8115)

Toyota Corolla Cross (2022-2024) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Battery System / Hybrid/EV Battery Cooling Fan 1 Control Circuit High (P0A8100,P0A8115)

DESCRIPTION

Refer to the description for DTC P0A8111.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P0A8100

Hybrid/EV Battery Cooling Fan 1 Control Circuit High

Both of the following conditions are met:

  • The HV battery temperature is high and the hybrid battery cooling fan speed calculated based on the battery cooling blower assembly output frequency (FP0) is not within the target control speed range.
  • The HV battery temperature is high and the battery cooling blower assembly speed is excessively high when a speed below a certain level is requested.

(1 trip detection logic)

  • Battery cooling blower assembly
  • Battery ECU assembly

Comes on

Master warning:

Comes on

SAE Code: P0A85

P0A8115

Hybrid/EV Battery Cooling Fan 1 Circuit Short to Auxiliary Battery or Open

Both of the following conditions are met:

  • The speed calculated based on the battery cooling blower assembly output frequency (FP0) is not within the target control speed range.
  • The battery cooling blower assembly speed is excessively high when a speed below a certain level is requested.

(2 trip detection logic)

  • Battery cooling blower assembly
  • Battery ECU assembly

Comes on

Master warning:

Comes on

SAE Code: P0A85

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 speed.
  • If the battery cooling blower assembly speed is excessively high, this DTC is stored.

MONITOR DESCRIPTION

If the battery ECU assembly detects that the speed of the battery cooling blower assembly is higher than the target speed, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0A85 (INF P0A8100): Hybrid/EV Battery Cooling Fan 1 Control Circuit High

P0A85 (INF P0A8115): Hybrid/EV Battery Cooling Fan 1 Circuit Short to Auxiliary Battery or Open

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 P0A85 (INF P0A8100) is not detected

DTC P0A85 (INF P0A8115) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

  • After repairs have been completed, clear the DTCs 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 and turn the GTS on.
  6. Enter the following menus: Powertrain / HV Battery / Active Test / Control the Hybrid/EV Battery Cooling Fan.[*1]
  7. Select fan mode 6 and operate the battery cooling blower assembly and wait 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 or by operation sounds.
    • [*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

P0A8100 or P0A8115 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 BATTERY ECU ASSEMBLY (FREQUENCY)

Click here

OK

REPLACE BATTERY COOLING BLOWER ASSEMBLY

NG

REPLACE BATTERY ECU ASSEMBLY

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