HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A84-123

DTC Code DTC Name
P0A84-123 Hybrid Battery Pack Cooling Fan 1 Control Circuit Low

DESCRIPTION


DTC No. INF Code DTC Detection Condition Trouble Area
P0A84 123 When the speed calculated based on the battery cooling blower assembly frequency (FP) is out of the target control speed range (1 trip detection)

  • Wire harness or connector

  • BATT FAN fuse

  • Battery cooling blower assembly

  • Battery smart unit

  • Power management control ECU

WIRING DIAGRAM

A01UZSOE02

CAUTION / NOTICE / HINT

CAUTION:


  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, turn the ignition switch off and 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.

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.

PROCEDURE


  1. CHECK FOR DTCS (HYBRID CONTROL)


    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. Read output DTCs Click here.

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

    5. Turn the ignition switch off.


    B

    GO TO DTC CHART (P0AFC-123) Click here

    A

  2. PERFORM ACTIVE TEST USING GTS


    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.

      Note

      If the Active Test cannot be performed, skip it and proceed to the next step to check fan operates and air is sucked. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling blower assembly.

    4. Select air volume mode 6 in the "Driving the Battery Cooling Fan" Active Test to operate the battery cooling blower assembly.

    5. Check that the fan operates and air is sucked into the inlet duct.

      Tech Tips

      The cooling fan may not stop even when turning the cooling fan off in the "Driving the Battery Cooling Fan" Active Test. This is due to HV system control and not a malfunction.

      OK
      The fan operates.

    6. Turn the ignition switch off.


    NG

    CHECK FUSE (BATT FAN) Click here

    OK

  3. 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. A01UYL8E02
      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

    6. Connect the battery cooling blower assembly connector.

    7. Connect the battery smart unit connector.

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK BATTERY SMART UNIT (FREQUENCY)

    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 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 / Active Test / Driving the Battery Cooling Fan.

      Note

      If the Active Test cannot be performed, skip it and proceed to the next step to check Frequency. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling blower assembly.

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

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

    9. A01V1GGE02
      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 Specified Condition
      K34-2 (FP0) - K34-4 (GND0) Active test being performed Difference between the value in the Data List (Cooling Fan Frequency 1) and the actual measurement value is 10% or less.

      Note

      Turning the ignition switch to ON (IG) with the service 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.

    10. Turn the ignition switch off.

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

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


    OK

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

    NG

    REPLACE BATTERY SMART UNIT Click here

  5. CHECK FUSE (BATT FAN)


    1. Remove the BATT FAN fuse from the No. 2 engine room relay block.

    2. A01V1PWE03
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 BATT FAN Fuse

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      BATT FAN fuse Always Below 1 Ω

    3. Install the BATT FAN fuse.


    NG

    CHECK HARNESS AND CONNECTOR (BATT FAN FUSE - BATTERY COOLING BLOWER ASSEMBLY) Click here

    OK

  6. CHECK BATTERY COOLING BLOWER ASSEMBLY (VOLTAGE)

    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 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 / Active Test / Driving the Battery Cooling Fan.

      Note

      If the Active Test cannot be performed, skip it and proceed to the next step to check voltage. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling blower assembly.

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

    8. A01V1P5E02
      Text in Illustration
      *a

      Component with harness connected

      (Battery Cooling Blower Assembly)
      *b

      Rear view of wire harness connector

      (to Battery Cooling Blower Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      K34-1 (IG0) - Body ground Ignition switch ON (IG) 11 to 14 V

      Note

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

      Tech Tips

      Measure the voltage on the wire side of the connector that is part of the battery cooling blower.

    9. Turn the ignition switch off.

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

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


    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (SI0 VOLTAGE)


    1. Disconnect the power management control ECU connector.

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

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

    4. A01UYCGE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A26-29 (SI0) - Body ground Ignition switch ON (IG) 4.5 to 5.5 V

      Note

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    5. Turn the ignition switch off.

    6. Connect the power management control ECU connector.

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


    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

  8. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER ASSEMBLY - POWER MANAGEMENT CONTROL ECU


    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. Disconnect the battery cooling blower assembly connector.

    4. Disconnect the power management control ECU connector.

    5. A01UZ1CE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Battery Cooling Blower Assembly)
      *b

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      K34-3 (SI0) - A26-29 (SI0) Ignition switch off Below 1 Ω
      K34-3 (SI0) or A26-29 (SI0) - Body ground Ignition switch off 10 kΩ or higher

      Note

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    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
      K34-3 (SI0) - Body ground Ignition switch ON (IG) Below 1 V

      Note

      Turning the ignition switch to ON (IG) with the battery cooling blower assembly connector and power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    9. Turn the ignition switch off.

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

    11. Connect the battery cooling blower assembly connector.

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

    13. Connect the power management control ECU connector.


    OK

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)


    1. Disconnect the power management control ECU connector.

    2. A01UZR3E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F55-5 (E01) - Body ground Ignition switch off Below 1 Ω

      Note

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    3. Connect the power management control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)


    1. Disconnect the power management control ECU connector.

    2. A01UXY4E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F56-5 (E02) - Body ground Ignition switch off Below 1 Ω

      Note

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    3. Connect the power management control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK HARNESS AND CONNECTOR (IGCT RELAY - BATTERY COOLING BLOWER ASSEMBLY)


    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 IGCT relay from the No. 2 engine room relay block.

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

    4. Disconnect the battery cooling blower assembly connector.

    5. A01V00FE02
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 IGCT Relay
      *a

      Front view of wire harness connector

      (to Battery Cooling Blower Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      5 (IGCT relay block holder) - K34-1 (IG0) Ignition switch off Below 1 Ω

      Note

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    6. Connect the battery cooling blower assembly connector.

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

    8. Install the IGCT relay.


    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. CHECK HARNESS AND CONNECTOR (BATT FAN FUSE - BATTERY COOLING BLOWER ASSEMBLY)


    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 BATT FAN fuse from the No. 2 engine room relay block.

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

    4. Disconnect the battery cooling blower assembly connector.

    5. A01UZCIE02
      Text in Illustration
      *1 No. 2 Engine Room Relay Block
      *2 BATT FAN fuse
      *a

      Front view of wire harness connector

      (to Battery Cooling Blower Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      K34-1 (IG0) - Terminals other than 2 (BATT FAN fuse holder) and body ground Ignition switch off 10 kΩ or higher

      Note

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    6. Connect the battery cooling blower assembly connector.

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

    8. Install the BATT FAN fuse.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  13. REPLACE BATTERY COOLING BLOWER ASSEMBLY

    Click here


    NEXT

    REPLACE FUSE (BATT FAN)

  14. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

    REPLACE FUSE (BATT FAN)