HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A85-123

DTC Code DTC Name
P0A85-123 Hybrid Battery Pack Cooling Fan 1 Control Circuit High

DESCRIPTION

Refer to the circuit description for DTC P0A84-123 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P0A85 123

Both of the following conditions are met due to the battery cooling blower system malfunction:

(1 trip detection logic)


  • The speed calculated based on the battery cooling blower assembly output frequency (FP) 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.

  • Battery cooling blower assembly

  • Battery smart unit
Related Data List
DTC No. Data List
P0A85-123

  • Cooling Fan 0

  • Cooling Fan Mode 1

  • Cooling Fan Frequency 1

The following items can be helpful when performing repairs:


Related Active Test
DTC No. Active Test
P0A85-123 Driving the Battery Cooling Fan

Tech Tips


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

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

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A84-123 Click here.

CAUTION / NOTICE / HINT

CAUTION:


  • Before inspecting the high-voltage system, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, 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.

    Tech Tips

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

  • When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

Note

After turning the ignition 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 Click here.

Tech Tips


  • After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan.

    4. Select fan mode 6 and operate the battery cooling blower assembly.

  • Operation of the battery cooling blower can be confirmed by checking if air is sucked into the air intake port of the intake duct.

PROCEDURE


  1. CHECK FOR DTCS (HV)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Check and record any HV system DTCs, INF codes and freeze frame data.

    5. Read output DTCs Click here.

      Result
      Result Proceed to
      P0AFC-123 is not output. A
      P0AFC-123 is also output. B

    6. Turn the ignition switch off.

    7. Disconnect the GTS from the DLC3.


    B

    GO TO DTC CHART (P0AFC-123) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - BATTERY SMART UNIT)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed.

      Note

      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.

    2. Remove the No. 1 hybrid battery exhaust duct Click here.

    3. Disconnect the battery cooling blower assembly connector.

    4. Disconnect the battery smart unit connector.

    5. A004FKDE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Battery Cooling Blower Assembly)
      *b

      Rear view of wire harness connector

      (to Battery Smart Unit)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      K34-2 (FP0) - K32-5 (FP0) Ignition switch off Below 1 Ω
      K34-2 (FP0) or K32-5 (FP0) - Body ground Ignition switch off 10 kΩ or higher

      Tech Tips

      As there might be an intermittent malfunction, inspect the following items even the measured resistance is as specified.


      • Check that each connector between the hybrid vehicle control ECU assembly and battery cooling blower assembly is not loose or disconnected.

    6. Connect the cable to the negative (-) auxiliary battery terminal.

    7. Turn the ignition switch to ON (IG).

    8. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      K34-2 (FP0) - Body ground Ignition switch ON (IG) Below 1 V

    9. Turn the ignition switch off.

    10. Connect the battery cooling blower assembly connector.

    11. Connect the battery smart unit connector.

    12. Install the No. 1 hybrid battery exhaust duct.


    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - BATTERY SMART UNIT)

    OK

  3. CHECK BATTERY SMART UNIT (FREQUENCY)


    1. Check that the service plug grip is not installed.

      Note

      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.

    2. Remove the rear seat cushion leg sub-assembly Click here.

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Connect the GTS to the DLC3.

    5. Turn the ignition switch to ON (IG).

      Note


      • 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.

      • If the ignition switch is turned to on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be stored. If this DTC is output, clear the DTC using the GTS Click here.

    6. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    7. Clear the DTCs and freeze frame data.

      Note

      When DTCs are cleared, freeze frame data and INF codes are also cleared.

    8. Enter the following menus: Powertrain / Hybrid Control / Active Test / Driving the Battery Cooling Fan.

    9. Enter the following menus: Powertrain / Hybrid Control / Data List / All Data / Cooling Fan Frequency 1.

    10. Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" Active Test to operate the battery cooling blower assembly.

    11. A004EF0E02
      Text in Illustration
      *a

      Component with harness connected

      (Battery Cooling Blower Assembly)
      *b

      Rear view of wire harness connector

      (to Battery Cooling Blower Assembly)

      While the cooling fan is operating, compare the value in the Data List (Cooling Fan Frequency 1) with the Frequency value that was actually measured at the battery cooling blower assembly connector.

      Standard
      Tester Connection Condition
      K34-2 (FP0) - K34-4 (GND0) Battery cooling blower assembly is operating
      Result
      Result Proceed to
      Difference between the value in the Data List (Cooling Fan Frequency 1) and the actual measurement value at the battery cooling blower assembly connector is 10% or less. A
      Difference between the value in the Data List (Cooling Fan Frequency 1) and the actual measurement value at the battery cooling blower assembly connector is more than 10%. B

      Note

      Turning the ignition switch to ON (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

      Tech Tips

      Compare the values in each air volume mode (1 to 6). If the Active Test cannot be performed, compare the values only in the current air volume mode.

    12. Turn the ignition switch off.

    13. Disconnect the cable from the negative (-) auxiliary battery terminal.

    14. Install the rear seat cushion leg sub-assembly.


    A

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

    B

    REPLACE BATTERY SMART UNIT Click here