HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A9A-123

DTC Code DTC Name
P0A9A-123 Hybrid Battery Pack Cooling Fan 2 Control Circuit High

DESCRIPTION

Refer to the description for DTC P0A84-123.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A9A-123 Hybrid Battery Pack Cooling Fan 2 Control Circuit High

Both of the following conditions are met:

(1 trip detection logic)


  • The speed calculated based on the battery cooling blower assembly LH output frequency (FP1) is not within the target control speed range.

  • The battery cooling blower assembly LH speed is excessively high when a speed below a certain level is requested.

  • Battery voltage sensor

  • Battery cooling blower assembly LH

 Does not come on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P0A9A-123

  • Cooling Fan 1

  • Cooling Fan Mode2

  • Cooling Fan Frequency2

The following items can be helpful when performing repairs:


Tech Tips


  • "Cooling Fan Frequency2" is detected when the battery cooling blower assembly LH is operating and its value changes in proportion to the battery cooling blower assembly LH speed.

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

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A84-123.

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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.

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    Tech Tips

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

Note

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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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 power switch 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 LH.

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

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)

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

    1. Connect the GTS to the DLC3.

    2. Turn the power switch 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.


      Powertrain > Hybrid Control > Trouble Codes
      Result
      Result Proceed to
      P0AFC-123 is not output. A
      P0AFC-123 is also output. B

    6. Turn the power switch off.

    7. Disconnect the GTS from the DLC3.


    B

    GO TO DTC CHART (P0AFC-123) Click here

    A

  2. CHECK BATTERY VOLTAGE SENSOR (FREQUENCY)

    Result
    Proceed to
    OK
    NG

    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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the No. 2 tool box sub-assembly.

      Click here

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

    4. Connect the GTS to the DLC3.

    5. Turn the power switch on (IG).

    6. Enter the following menus: Powertrain / Hybrid Control / Clear DTCs.

    7. Clear the DTCs and freeze frame data.


      Powertrain > Hybrid Control > Clear DTCs

      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.


      Powertrain > Hybrid Control > Active Test
      Tester Display Measurement Item Control Range Restrict Condition
      Driving the Battery Cooling Fan Battery cooling blower assembly operation and blower volume can be checked. The battery cooling blower assembly can be turned off or operated in fan mode 1 through 6. -

      Powertrain > Hybrid Control > Active Test
      Tester Display
      Driving the Battery Cooling Fan

    9. Enter the following menus: Powertrain / Hybrid Control / Data List / Cooling Fan Frequency2.


      Powertrain > Hybrid Control > Data List
      Tester Display
      Cooling Fan Frequency2

    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 LH.

      Note

      If the Active Test cannot be performed, skip it and proceed to the next step to check the frequency value. In accordance with fail-safe system operation, the hybrid vehicle control ECU sends a command to operate the battery cooling fan assembly LH.

    11. B002KSKC05
      *a

      Component with harness connected

      (Battery Cooling Blower Assembly LH)
      *b

      Rear view of wire harness connector

      (to Battery Cooling Blower Assembly LH)

      While the cooling fan is operating, compare the value in the Data List (Cooling Fan Frequency2) with the frequency value that was actually measured at the battery cooling blower assembly LH connector.

      Specified Condition
      Tester Connection Condition Specified Condition
      Q34-2 (FP1) - Q34-4 (GND1) Battery cooling blower assembly LH is operating. Difference between the value in the Data List (Cooling Fan Frequency2) and the actual measurement value is 10% or less.

      Note

      Turning the power switch 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 power switch off.

    13. Disconnect the GTS from the DLC3.

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

    15. Install the No. 2 tool box sub-assembly.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BATTERY COOLING BLOWER ASSEMBLY LH Click here

    NG

    REPLACE BATTERY VOLTAGE SENSOR Click here