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 P0A99-123 Click here.

DTC Code DTC Detection Condition Trouble Area
P0A9A-123 When the output voltage of the battery cooling blower assembly (for lower side) (VM1) is not within the target control voltage range (1 trip detection)

  • Harness or connector

  • Battery cooling blower assembly (for lower side)

  • Battery smart unit

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A99-123 Click here, DTC P0A9D-123 Click here and DTC P0AAE-123 Click here.

INSPECTION PROCEDURE

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 disconnecting 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.

Tech Tips

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

PROCEDURE


  1. CHECK FOR DTCS (DTC P0AFC-123 IS OUTPUT)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    4. Check if DTCs are output.

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

    B

    GO TO DTC (P0AFC-123) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (VM1 VOLTAGE)

    CAUTION:

    Be sure to wear insulated gloves.


    1. A01H0BTE01

      Remove the HV battery Click here.

    2. Place the HV battery in the vehicle so that measurements can be made at the battery cooling blower assembly (for lower side) connector.

      Note

      Make sure all the covers are installed to the HV battery when placing it in the vehicle, and then remove the covers again after the HV battery is in place.

      Tech Tips


      • Follow the installation procedures to the point where the HV battery is set in the vehicle Click here.

      • Do not install the service plug grip.

    3. Reconnect all the connectors that were disconnected when the HV battery was removed.

    4. Turn the power switch on (IG).

    5. Using a service wire, connect terminals z77-3 (SI1) and z77-4 (GND1) of the battery cooling blower assembly (for lower side) connector.

      CAUTION:

      Do not touch the fan while it is operating.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      z77-2 (VM1) - z77-4 (GND1) Power switch on (IG) 5 V or less

      Tech Tips


      • Perform this inspection with the battery cooling blower assembly (for lower side) connector connected.

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


    NG

    CHECK HARNESS AND CONNECTOR (VM1 VOLTAGE) Click here

    OK

  3. CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR AND INTAKE AIR TEMPERATURE SENSOR)

    CAUTION:

    Be sure to wear insulated gloves.


    1. A01GYNQE04

      Remove the HV battery Click here.

    2. Disconnect the z36 and z87 battery smart unit connectors.

      Tech Tips

      For the removal and installation procedures related to the battery smart unit connector inspection, Click here.

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

      Standard Resistance (Battery temperature sensors)
      Tester Connection Condition Specified Condition
      z87-7 (TB0) - z36-1 (IGCT) Always 10 kΩ or higher
      z87-6 (TB1) - z36-1 (IGCT) Always 10 kΩ or higher
      z87-5 (TB2) - z36-1 (IGCT) Always 10 kΩ or higher
      z87-4 (TB3) - z36-1 (IGCT) Always 10 kΩ or higher
      z87-3 (TB4) - z36-1 (IGCT) Always 10 kΩ or higher
      z87-2 (TB5) - z36-1 (IGCT) Always 10 kΩ or higher
      Standard Resistance (Intake air temperature sensor)
      Tester Connection Condition Specified Condition
      z87-1 (TC0) - z36-1 (IGCT) Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BATTERY SMART UNIT Click here

  4. CHECK HARNESS AND CONNECTOR (VM1 VOLTAGE)

    CAUTION:

    Be sure to wear insulated gloves.


    1. A01GXZIE04

      Disconnect the z77 battery cooling blower assembly (for lower side) connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      z77-2 (VM1) - z77-4 (GND1) Power switch on (IG) 5 V or less

      Tech Tips


      • Turning the power switch on (IG) with the battery cooling blower assembly (for lower side) connector disconnected may cause DTC P0A99-123 (Hybrid Battery Pack Cooling Fan 2 Control Circuit Low) to be set. Make sure to clear this code using the intelligent tester Click here.

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


    NG

    CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - BATTERY COOLING BLOWER ASSEMBLY [FOR LOWER SIDE]) Click here

    OK

    REPLACE BATTERY COOLING BLOWER ASSEMBLY (for Lower Side) Click here

  5. CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - BATTERY COOLING BLOWER ASSEMBLY [FOR LOWER SIDE])

    CAUTION:

    Be sure to wear insulated gloves.


    1. A01GXHNE02

      Remove the HV battery Click here.

    2. Disconnect the z36 battery smart unit connector.

      Tech Tips

      For the removal and installation procedures related to the battery smart unit connector inspection, Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z36-7 (VM1) or z77-2 (VM1) - Other terminals Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BATTERY SMART UNIT Click here