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

A003VDBE03

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.

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.

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 / DTC.

    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. Connect the intelligent tester 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.

      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.

    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.

    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. A003W1YE02

      Disconnect connector Q14 from the battery cooling blower assembly.

    3. A003WUPE13

      Disconnect connector i1 from the battery smart unit.

    4. A003ZKTE06
      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
      Q14-2 (VM0) - i1-7 (VM) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      Q14-2 (VM0) or i1-7 (VM) - Body ground Power switch off 10 kΩ or higher

    5. Connect the battery cooling blower assembly connector.

    6. Connect the battery smart unit connector.


    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. Connect the intelligent tester to the DLC3.

    3. 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.

    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 voltage. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling fan.

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

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

    7. A003ZIFE12
      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
      Q14-2 (VM0) - Q14-4 (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.


    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.

      A003YILE01
      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. Connect the intelligent tester to the DLC3.

    3. 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.

    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 voltage. In accordance with fail-safe system operation, the power management control ECU sends a command to operate the battery cooling fan.

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

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

    7. A003ZIFE13
      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
      Q14-1 (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.

    8. Turn the power switch off.


    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. 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.

    3. A003Z87E02
      Text in Illustration
      *a

      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
      Q14-3 (SI0) - Q14-4 (GND0) Power switch on (IG) Fan operates

      Tech Tips

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

    4. Turn the power switch off.


    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 (-) auxiliary 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. A003W1YE02

      Disconnect connector Q14 from the battery cooling blower assembly.

    4. Disconnect connector A19 from the power management control ECU Click here.

    5. A003XZ9E05
      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
      Q14-3 (SI0) - A19-29 (SI0) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      Q14-3 (SI0) or A19-29 (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. Connect the cable to the negative (-) auxiliary battery terminal.

    7. 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.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Q14-3 (SI0) - Body ground Power switch on (IG) Below 1 V

    9. Turn the power switch off.

    10. Connect the battery cooling blower assembly connector.

    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 A19 from the power management control ECU Click here.

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

    3. A003ZHJE03
      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 - A19-4 (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
      A19-4 (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 the cable from the negative (-) auxiliary battery terminal.

    2. Disconnect connector H3 from the power management control ECU Click here.

    3. A003W1PE07
      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
      H3-5 (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 power management control ECU connector Click here.

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

    2. Disconnect connector H4 from the power management control ECU Click here.

    3. A003Z80E07
      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
      H4-5 (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 power management control ECU connector Click here.

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

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

    3. A003W1YE02

      Disconnect connector Q14 from the battery cooling blower assembly.

    4. A003Z9AE03
      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 - Q14-1 (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. Connect the cable to the negative (-) auxiliary battery terminal.


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

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

    3. A003W1YE02

      Disconnect connector Q14 from the battery cooling blower assembly.

    4. A003Z9AE03
      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
      Q14-1 (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. Connect the cable to the negative (-) auxiliary battery terminal.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. CHECK BATTERY COOLING BLOWER ASSEMBLY

    CAUTION:

    Be sure to wear insulated gloves.


    1. A003W1YE02

      Disconnect connector Q14 from the battery cooling blower assembly.

    2. A003YW7E06
      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
      Q14-1 (IG0) - Q14-4 (GND0) and body ground Power switch off 10 kΩ or higher

    3. Connect the battery cooling blower assembly connector.


    NG

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

    OK

    RECOVERY TO NORMAL