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

  • Integration relay

  • Battery cooling blower assembly

  • Battery smart unit

  • Power management control ECU

WIRING DIAGRAM

A01JBMOE01

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.

    Tech Tips

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

Note

After the power switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the power switch off, make sure to wait at least 60 seconds before disconnecting the cable from the negative (-) battery terminal.

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. 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. Disconnect the intelligent tester from the DLC3.


    B

    GO TO DTC CHART

    A

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Remove the rear side seatback 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.

      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 fan.

    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 side seatback assembly RH Click here.


    NG

    CHECK INTEGRATION NO.2 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. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

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

    4. A01JBKD

      Disconnect the S14 connector of the battery cooling blower assembly.

    5. A01J9DNE03

      Disconnect the c1 connector of the battery smart unit.

    6. A01JCKQE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Battery Cooling Blower Assembly)
      *2

      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
      S14-2 (VM0) - c1-7 (VM) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      S14-2 (VM0) or c1-7 (VM) - Body ground Power switch off 10 kΩ or higher

    7. Connect the S14 connector of the battery cooling blower assembly.

    8. Connect the c1 connector of the battery smart unit.

    9. 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. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

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

    4. Connect the cable to the negative (-) battery terminal.

    5. Connect the intelligent tester to the DLC3.

    6. 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.

      • If the power switch is turned 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 intelligent tester Click here.

    7. 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 fan.

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

    9. Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" active test to operate the battery cooling blower assembly.

    10. A01J9E5E01
      Text in Illustration
      *1

      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
      S14-2 (VM0) - S14-4 (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). If the active test cannot be performed, compare the values only in the current air volume mode.

    11. 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 INTEGRATION NO.2 RELAY (BATT FAN)


    1. Remove the integration relay from the engine room junction block assembly Click here.

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

      A01J9F0E01
      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
      Text in Illustration
      *1 Integration Relay *2 BATT FAN Fuse
      *3 BATT FAN Relay - -

    3. Install the integration relay Click here.


    NG

    REPLACE INTEGRATION NO. 2 RELAY Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (VOLTAGE)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

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

    4. Connect the cable to the negative (-) battery terminal.

    5. Connect the intelligent tester to the DLC3.

    6. 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.

      • If the power switch is turned 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 intelligent tester Click here.

    7. 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 fan.

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

    9. Select each air volume mode (1 to 6) in the "Driving the Battery Cooling Fan" active test to operate the battery cooling blower assembly.

    10. A01J9E5E02
      Text in Illustration
      *1

      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
      S14-1 (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.

    11. Turn the power switch off.

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


    NG

    CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU) Click here

    OK

  7. CHECK BATTERY COOLING BLOWER ASSEMBLY


    1. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

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

    4. Connect the cable to the negative (-) battery terminal.

    5. 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.

      • If the power switch is turned 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 intelligent tester Click here.

    6. A01JD31E01
      Text in Illustration
      *1

      Component with harness connected

      (Battery Cooling Blower Assembly)

      Using a service wire, connect terminals 3 (SI0) and 4 (GND0) of the battery cooling blower assembly connector.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      S14-3 (SI0) - S14-4 (GND0) Power switch on (IG) Fan operates

      Tech Tips

      If DTCs are output after the check, clear the DTCs using the intelligent tester.

    7. Turn the power switch off.

    8. 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. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

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

    4. A01JBKD

      Remove the S14 connector of the battery cooling blower assembly.

    5. Disconnect the A21 connector of the power management control ECU Click here.

    6. A01JALME01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Battery Cooling Blower Assembly)
      *2

      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
      S14-3 (SI0) - A21-29 (SI0) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      S14-3 (SI0) or A21-29 (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.

    7. Connect the cable to the negative (-) battery terminal.

    8. 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.

      • If the power switch is turned 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 intelligent tester Click here.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      S14-3 (SI0) - Body ground Power switch on (IG) Below 1 V

    10. Turn the power switch off.

    11. Connect the S14 connector of the battery cooling blower assembly.

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

    13. Connect the A21 connector of the power management control ECU Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  9. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the A21 connector of the power management control ECU Click here.

    3. Remove the integration relay Click here.

    4. A01JCROE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Integration Relay)
      *2

      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 - A21-4 (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.

    5. Connect the cable to the negative (-) battery terminal.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A21-4 (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 disconnected, DTCs will be stored. If DTCs are output, clear them using the intelligent tester Click here.

    7. Connect the A21 connector of the power management control ECU Click here.

    8. Install the 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 the cable from the negative (-) battery terminal.

    2. Disconnect the L5 connector of the power management control ECU Click here.

    3. A01J99QE02
      Text in Illustration
      *1

      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
      L5-5 (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.

    4. Connect the L5 connector of the power management control ECU Click here.

    5. Connect the cable to the negative (-) battery terminal.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the L6 connector of the power management control ECU Click here.

    3. A01JAEKE02
      Text in Illustration
      *1

      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
      L6-5 (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.

    4. Connect the L6 connector of the power management control ECU Click here.

    5. Connect the cable to the negative (-) battery terminal.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - BATTERY COOLING BLOWER ASSEMBLY)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Remove the integration relay Click here.

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

    4. A01JBKD

      Disconnect the S14 connector of the battery cooling blower assembly.

    5. A01J8ORE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Battery Cooling Blower Assembly)
      *2

      Front view of wire harness connector

      (to Integration Relay)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1A-8 - S14-1 (IG0) Power switch off Below 1 Ω

    6. Install the integration relay Click here.

    7. Connect the S14 connector of the battery cooling blower assembly.

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

    9. Connect the cable to the negative (-) battery terminal.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  13. REPLACE INTEGRATION NO. 2 RELAY


    1. Replace the integration relay Click here.


    NEXT

  14. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - BATTERY COOLING BLOWER ASSEMBLY)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Remove the integration relay Click here.

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

    4. A01JBKD

      Disconnect the S14 connector of the battery cooling blower assembly.

    5. A01J8ORE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Battery Cooling Blower Assembly)
      *2

      Front view of wire harness connector

      (to Integration Relay)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      S14-1 (IG0) - Terminals other than 1A-8 and body ground Power switch off 10 kΩ or higher

    6. Install the integration relay Click here.

    7. Connect the S14 connector of the battery cooling blower assembly.

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

    9. Connect the cable to the negative (-) battery terminal.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. CHECK BATTERY COOLING BLOWER ASSEMBLY


    1. Disconnect the cable from the negative (-) battery terminal.

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

    3. A01JBKD

      Disconnect the S14 connector of the battery cooling blower assembly.

    4. A01JAL5E01
      Text in Illustration
      *1

      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
      S14-1 (IG0) - S14-4 (GND0) and body ground Power switch off 10 kΩ or higher

    5. Connect the S14 connector of the battery cooling blower assembly.

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

    7. Connect the cable to the negative (-) battery terminal.


    NG

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

    OK

    RECOVERY TO NORMAL