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. DTC Detection Condition Trouble Area
P0A84-123

The battery cooling blower assembly is malfunctioning and both of the following conditions are met:

(1 trip detection logic)


  • The speed calculated based on the battery cooling blower assembly output frequency (FP0) is not within the target control speed range.

  • The battery cooling blower assembly speed is excessively low when a speed below a certain level is requested (possibility of open or short to ground in connected circuits, short to +B or motor locking).

  • Harness or connector

  • Battery cooling blower assembly

  • BATT FAN fuse

  • Battery voltage sensor

  • Power management control ECU
Related Data List
DTC No. Data List
P0A84-123

  • Cooling Fan 0

  • Cooling Fan Mode 1

  • Cooling Fan Frequency 1

Tech Tips

"Cooling Fan Frequency 1" is detected when the battery cooling blower assembly is operating and its value changes in proportion to the battery cooling blower assembly speed.

WIRING DIAGRAM

A01FU8BE01

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 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 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 Click here.

Tech Tips


  • As the battery cooling blower assembly speed is too low, there is a possibility of open or short to ground in connected circuits, short to +B or motor locking.

  • 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.

  • Operation of the battery cooling blower 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)


    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. Read output DTCs.

      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 (P0AFC-123) Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (Driving the Battery Cooling Fan)


    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. Clear DTCs and freeze frame data.

      Note

      When DTCs are cleared, freeze frame data and INF codes are also cleared.

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

      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 -

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

      Note

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

    7. Check that the battery cooling blower assembly operates and air is sucked into the inlet duct.

      Tech Tips

      The battery cooling blower assembly 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.

    8. Turn the power switch off.


    NG

    CHECK FUSE (BATT FAN) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - BATTERY COOLING BLOWER ASSEMBLY)

    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 upper hybrid battery cover sub-assembly Click here.

    3. Disconnect the m5 battery voltage sensor connector.

    4. Disconnect the X8 battery cooling blower assembly connector.

    5. A01FSTCE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Battery Voltage Sensor)
      *b

      Rear view of wire harness connector

      (to Battery Cooling Blower Assembly)

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

      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition
      m5-5 (FP0) - X8-2 (FP0) Power switch off Below 1 Ω
      m5-5 (FP0) or X8-2 (FP0) - Body ground Power switch off 10 kΩ or higher

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

    7. Turn the power switch on (IG).

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

      Standard Voltage:
      Tester Connection Switch Condition Specified Condition
      X8-2 (FP0) - Body ground Power switch on (IG) Below 1 V

      Note

      If the power switch is turned on (IG) with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

    9. Turn the power switch off.

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

    11. Reconnect the X8 battery cooling blower assembly connector.

    12. Reconnect the m5 battery voltage sensor connector.

    13. Install the upper hybrid battery cover sub-assembly.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    2. Remove the front luggage compartment trim cover 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 / Trouble Codes.

    7. Clear DTCs and freeze frame data.

      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.

      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 -

    9. Enter the following menus: All Data / Cooling Fan Frequency1.

    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.

      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 fan.

    11. A01FTMTE01
      Text in Illustration
      *a

      Component with harness connected

      (Battery Cooling Blower Assembly)
      *b

      Rear view of battery cooling blower assembly connector

      (to Wire Harness Connector)

      While the cooling fan is operating, compare the value in the Data List (Cooling Fan Frequency1) with the frequency value that was actually measured at the battery cooling blower assembly connector.

      Standard
      Tester Connection Condition Specified Condition
      X8-2 (FP0) - X8-4 (GND0) Battery cooling blower assembly is operating Difference between the value in the Data List (Cooling Fan Frequency1) and the actual measurement value is 10 % or less.

      Note

      Turning the power switch 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.

    12. Turn the power switch off.

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

    14. Install the front luggage compartment trim cover.


    NG

    REPLACE BATTERY VOLTAGE SENSOR Click here

    OK

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

  5. CHECK FUSE (BATT FAN)


    1. Remove the BATT FAN fuse from the No. 1 engine room relay block and junction block assembly.

    2. A01FQ1LE01
      Text in Illustration
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 BATT FAN Fuse

      Measure the resistance of the BATT FAN fuse.

      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 (BATTERY COOLING BLOWER ASSEMBLY - BATT FAN FUSE) Click here

    OK

  6. 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 front luggage compartment trim cover 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 / Trouble Codes.

    7. Clear DTCs and freeze frame data.

      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.

      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 -

    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.

      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.

    10. A01FTMTE02
      Text in Illustration
      *a

      Component with harness connected

      (Battery Cooling Blower Assembly)
      *b

      Rear view of battery cooling blower assembly connector

      (to Wire Harness Connector)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      X8-1 (IG0) - Body ground Battery cooling blower assembly is operating 11 to 14 V

      Note

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

      Tech Tips

      Perform this inspection with the battery cooling blower assembly connectors connected.

    11. Turn the power switch off.

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

    13. Install the front luggage compartment trim cover .


    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) 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 front luggage compartment trim cover Click here.

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

    4. Turn the power switch on (IG).

    5. A01FQHNE01
      Text in Illustration
      *a

      Component with harness connected

      (Battery Cooling Blower Assembly)
      *b

      Rear view of battery cooling blower assembly connector

      (to Wire Harness Connector)
      *1 SST

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

      Standard Condition
      Tester Connection Switch Condition Specified Condition
      X8-3 (SI0) - X8-4 (GND0) Power switch on (IG) Fan operates

      Note

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

      Tech Tips

      Perform this inspection with the battery cooling blower assembly connector connected.

    6. Turn the power switch off.

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

    8. Remove the service wire.

    9. Install the front luggage compartment trim cover.


    NG

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - 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 front luggage compartment trim cover Click here.

    3. Disconnect the N91 power management control ECU connector.

    4. Disconnect the X8 battery cooling blower assembly connector.

    5. A01FS6OE08
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)
      *b

      Rear 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
      N91-17 (SI0) - X8-3 (SI0) Power switch off Below 1 Ω
      N91-17 (SI0) or X8-3 (SI0) - Body ground Power switch off 10 kΩ or higher

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

    7. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      X8-3 (SI0) - Body ground Power switch on (IG) Below 1 V

      Note

      If the power switch is turned on (IG) with the connectors disconnected, other DTCs will be stored. Be sure to clear the DTCs after the inspection.

    9. Turn the power switch off.

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

    11. Reconnect the X8 battery cooling blower assembly connector.

    12. Reconnect the N91 power management control ECU connector.

    13. Install the front luggage compartment trim cover.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

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


    1. Disconnect the N91 power management control ECU connector.

    2. A01FV4UE22
      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
      N91-5 (E01) - Body ground Power switch off Below 1 Ω

    3. Reconnect the N91 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 N92 power management control ECU connector.

    2. A01FSANE18
      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
      N92-5 (E02) - Body ground Power switch off Below 1 Ω

    3. Reconnect the N92 power management control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    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 front luggage compartment trim cover Click here.

    3. Disconnect the X8 battery cooling blower assembly connector.

    4. Remove the IGCT relay.

    5. A01FSK3E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Battery Cooling Blower Assembly)
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
      *2 IGCT relay

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      X8-1 (IG0) - 5 (IGCT relay) 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.

    6. Install the BATT FAN fuse.

    7. Reconnect the X8 battery cooling blower assembly connector.

    8. Install the front luggage compartment trim cover.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

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


    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 front luggage compartment trim cover Click here.

    3. Disconnect the X8 battery cooling blower assembly connector.

    4. Remove the BATT FAN fuse.

    5. A01FRJGE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Battery Cooling Blower Assembly)
      *1 No. 1 Junction Block Assembly
      *2 BATT FAN Fuse

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      X8-1 (IG0) - Terminals other than 2 (BATT FAN fuse) and 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. Install the BATT FAN fuse.

    7. Reconnect the X8 battery cooling blower assembly connector.

    8. Install the front luggage compartment trim cover.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  13. 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 front luggage compartment trim cover Click here.

    3. Disconnect the X8 battery cooling blower assembly connector.

    4. A01FSZBE29
      Text in Illustration
      *a

      Component without harness connected

      (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
      X8-1 (IG0) - X8-4 (GND0) and 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.

    5. Reconnect the X8 battery cooling blower assembly connector.

    6. Install the front luggage compartment trim cover.


    NG

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

    OK

    REPLACE FUSE (BATT FAN)

  14. REPLACE BATTERY COOLING BLOWER ASSEMBLY


    1. Replace the battery cooling blower assembly Click here.


    NEXT

    REPLACE FUSE (BATT FAN)

  15. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

    REPLACE FUSE (BATT FAN)