HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A84-123

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

DESCRIPTION


DTC No. DTC Detection Condition Trouble Area
P0A84-123 When the output voltage of the battery cooling blower assembly (VM) is too low compared to the target control voltage range (1 trip detection)

  • Wire harness or connector

  • No. 2 integration relay

  • Battery cooling blower assembly

  • Battery smart unit

  • Power management control ECU

WIRING DIAGRAM

A003TT6E01

INSPECTION PROCEDURE

CAUTION:


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

PROCEDURE


  1. CHECK DTC OUTPUT (HV)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Check if DTCs are output.

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

    5. Turn the power switch off.


    B

    GO TO DTC CHART Click here

    A

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Remove the rear seat assembly RH Click here.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (IG).

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

      Tech Tips

      Check Cooling Fan Mode1 in the Data List. If the mode is 6, it is not necessary to perform the Active Test.

    5. Select air volume mode 6 in the "Driving the Battery Cooling Fan" active test to operate the battery cooling blower assembly.

    6. 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.

    7. Install the rear seat assembly RH Click here.


    NG

    CHECK NO. 2 INTEGRATION RELAY (BATT FAN) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER - 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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.

    3. A003TRBE01

      Disconnect connector M24 from the battery cooling blower assembly.

    4. A003TSJE07

      Disconnect connector d1 from the battery smart unit.

    5. A003TB9E02
      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 (Check for Open)
      Tester Connection Switch Condition Specified Condition
      M24-2 (VM0) - d1-7 (VM) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      M24-2 (VM0) or d1-7 (VM) - Body ground Power 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 vehicle battery carrier bracket sub-assembly Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK BATTERY COOLING BLOWER ASSEMBLY (VOLTAGE)


    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. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the power switch on (IG).

      Note

      Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC to be set. Use the intelligent tester to clear the DTCs Click here.

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

      Tech Tips

      Check "Cooling Fan Mode 1" in the data list using the intelligent tester. If the "Cooling Fan Mode 1" is 1 to 6, it is not necessary to perform the Active Test.

    6. Enter the following menus: All Data / VMF Fan Motor Voltage 1.

    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. A003TECE04
      Text in Illustration
      *a

      Component with harness connected

      (Battery Cooling Blower assembly)

      While the cooling fan is operating, compare the value in the data list (VMF Fan Motor Voltage 1) with the voltage value that was actually measured at the battery cooling blower assembly connector.

      Standard
      Tester Connection Condition Specified Condition
      M24-2 (VM0) - M24-4 (GND0) Battery cooling blower is operating. Difference between the value in the Data List (VMF Fan Motor Voltage 1) and the actual measurement value is 1 V or less.

      Tech Tips

      Compare the values in each air volume mode (1 to 6).

    9. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.


    NG

    REPLACE BATTERY SMART UNIT Click here

    OK

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

  5. CHECK NO. 2 INTEGRATION RELAY (BATT FAN)


    1. Remove the No. 2 integration relay from the engine room junction block assembly Click here.

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

      A003S2CE01
      Text in Illustration
      *1 No. 2 Integration Relay *2 BATT FAN Fuse
      *3 BATT FAN Relay - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      1C-1 - 1A-8 Battery voltage is applied across terminals 1A-6 and 1A-7. Below 1 Ω
      No battery voltage is applied across terminals 1A-6 and 1A-7. 10 kΩ or higher

    3. Install the No. 2 integration relay Click here.


    NG

    REPLACE NO. 2 INTEGRATION RELAY Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (IG0 VOLTAGE)


    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. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the power switch on (IG).

      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.

      • Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC to be set. Use the intelligent tester to clear the DTCs Click here.

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

      Tech Tips

      Check "Cooling Fan Mode 1" in the data list using the intelligent tester. If the "Cooling Fan Mode 1" is 1 to 6, it is not necessary to perform the Active Test.

    6. Enter the following menus: All Data / VMF Fan Motor Voltage 1.

    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. A003TECE05
      Text in Illustration
      *a

      Component with harness connected

      (Battery Cooling Blower Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      M24-1 (IG0) - Body ground Battery cooling blower is operating. 11 to 14 V

      Tech Tips

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

    9. Turn the power switch off.

    10. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.


    NG

    CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU) Click here

    OK

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

    2. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the power switch on (IG).

      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.

      • Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC to be set. Use the intelligent tester to clear the DTCs Click here.

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

    6. Select air volume mode 0 in the "Driving the Battery Cooling Fan" active test to operate the battery cooling blower assembly.

    7. A003TECE06
      Text in Illustration
      *a

      Component with harness connected

      (Battery Cooling Blower Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      M24-3 (SI0) - M24-4 (GND0) Battery cooling blower is operating. 4.5 to 5.5 V

      Tech Tips

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

    8. Turn the power switch off.

    9. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.


    NG

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER - 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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the upper hybrid battery cover sub-assembly Click here.

    3. A003TRBE01

      Disconnect connector M24 from the battery cooling blower assembly.

    4. Disconnect connector A98 from the power management control ECU Click here.

    5. A003UQKE02
      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 (Check for Open)
      Tester Connection Switch Condition Specified Condition
      M24-3 (SI0) - A98-29 (SI0) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      M24-3 (SI0) or A98-29 (SI0) - Body ground Power 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. Turn the power switch on (IG).

      Note

      Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC to be set. Use the intelligent tester to clear the DTCs Click here.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      M24-3 (SI0) - Body ground Power switch on (IG) Below 1 V

    8. Turn the power switch off.

    9. Connect the battery cooling blower assembly connector.

    10. Install the upper hybrid battery cover sub-assembly Click here.

    11. Connect the power management control ECU connector Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  9. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect connector A98 from the power management control ECU Click here.

    2. Remove the No. 2 integration relay Click here.

    3. A003V18E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 2 Integration Relay)
      *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
      1A-7 - A98-4 (FCTL) Power 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.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A98-4 (FCTL) - Body ground Power switch off Below 1 V
      Power switch on (IG) Below 1 V

      Note

      If the power switch is turned on (IG) with the connector removed, DTCs will be stored. If the DTCs are output, clear the DTCs using the intelligent tester Click here.

    5. Connect the power management control ECU connector Click here.

    6. Install the No. 2 integration relay Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect connector E111 from the power management control ECU Click here.

    2. A003RVJE03
      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
      E111-5 (E01) - Body ground Power 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 Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect connector E112 from the power management control ECU Click here.

    2. A003RRAE03
      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
      E112-5 (E02) - Body ground Power 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 Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BATTERY COOLING BLOWER ASSEMBLY)


    1. Remove the No. 2 integration relay Click here.

    2. Remove the upper hybrid battery cover sub-assembly Click here.

    3. A003TRBE01

      Disconnect connector M24 from the battery cooling blower assembly.

    4. A003U33E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Battery Cooling Blower Assembly)
      *b

      Front view of wire harness connector

      (to No. 2 Integration Relay)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1A-8 - M24-1 (IG0) Power switch off Below 1 Ω

    5. Install the No. 2 integration relay Click here.

    6. Connect the battery cooling blower assembly connector.

    7. Install the upper hybrid battery cover sub-assembly Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  13. REPLACE NO. 2 INTEGRATION RELAY


    1. Replace the No. 2 integration relay Click here.


    NEXT

  14. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BATTERY COOLING BLOWER ASSEMBLY)


    1. Remove the No. 2 integration relay Click here.

    2. Remove the upper hybrid battery cover sub-assembly Click here.

    3. A003TRBE01

      Disconnect connector M24 from the battery cooling blower assembly.

    4. A003U33E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Battery Cooling Blower Assembly)
      *b

      Front view of wire harness connector

      (to No. 2 Integration Relay)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      M24-1 (IG0) - Terminals other than 1A-8 and body ground Power switch off 10 kΩ or higher

    5. Install the No. 2 integration relay Click here.

    6. Connect the battery cooling blower assembly connector.

    7. Install the upper hybrid battery cover sub-assembly Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. CHECK BATTERY COOLING BLOWER ASSEMBLY

    CAUTION:

    Be sure to wear insulated gloves.


    1. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.

    2. A003TRBE01

      Disconnect connector M24 from the battery cooling blower assembly.

    3. A003T3NE03
      Text in Illustration
      *a

      Component without harness connected

      (Battery Cooling Blower Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      M24-1 (IG0) - M24-4 (GND0) and body ground Power switch off 10 kΩ or higher

    4. Connect the battery cooling blower assembly connector.

    5. Install the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.


    NG

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

    OK

    RECOVERY TO NORMAL