HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A85-123

DTC Code DTC Name
P0A85-123 Hybrid Battery Pack Cooling Fan 1

DESCRIPTION

Refer to the circuit description for DTC P0A84-123 Click here.

DTC No. DTC Detection Condition Trouble Area
P0A85-123 When the output voltage of the battery cooling blower assembly (VM) is too high compared to the target control voltage range (1 trip detection)

  • Wire harness or connector

  • Battery cooling blower assembly

  • Battery smart unit

  • Hybrid battery thermistor

WIRING DIAGRAM

B001MZ0E14

CAUTION / NOTICE / HINT

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

    6. B001LHME02
      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
      Q14-2 (VM0) - Q14-4 (GND0) Battery cooling blower is operating. Below 5 V

      Tech Tips

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

    7. Turn the power switch off.


    NG

    CHECK HARNESS AND CONNECTOR (VM0 VOLTAGE) 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. B001LS9E02

      Disconnect connector Q14 from the battery cooling blower assembly.

    3. B001N1JE01

      Disconnect connector i1 from the battery smart unit.

    4. B001KWFE02
      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 cable to the negative (-) auxiliary battery terminal.

    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.

      • 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
      Q14-2 (VM0) - Body ground Power switch on (IG) Below 1 V

      Tech Tips

      As there might be an intermittent malfunction, inspect the following items even if the measured voltage is as specified.

      Check that each connector between the battery voltage sensor and battery cooling blower assembly is not loose or disconnected.

    8. Turn the power switch off.

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

    10. Connect the battery cooling blower assembly connector.

    11. Connect the battery smart unit connector.


    NG

    REPAIR HARNESS OR CONNECTOR

    OK

  4. CHECK HYBRID BATTERY THERMISTOR (BATTERY TEMPERATURE SENSOR AND INLET AIR TEMPERATURE SENSOR)

    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. B001KOCE02

      Disconnect connectors i1 and z10 from the battery smart unit.

    3. B001KFQE02
      Text in Illustration
      *a

      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
      z10-6 (TBO) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-12 (GBO) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-5 (TB1) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-11 (GB1) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-4 (TB2) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-10 (GB2) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-1 (TCO) - i1-4 (IGCT) Power switch off 10 kΩ or higher
      z10-7 (GCO) - i1-4 (IGCT) Power switch off 10 kΩ or higher

    4. Connect the battery smart unit connectors.


    OK

    REPLACE BATTERY SMART UNIT Click here

    NG

  5. CHECK HARNESS AND CONNECTOR (INLET AIR TEMPERATURE SENSOR AND BATTERY TEMPERATURE SENSOR)

    CAUTION:

    Be sure to wear insulated gloves and protective goggles.


    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. Check the wire harness and connectors of the battery temperature sensor and inlet air temperature sensor for abnormalities by sight and touch.

      B001MX6
      Specified Condition
      There are no open or short circuits in the wire harness and connectors. There are no short circuits to other wire harnesses.

    OK

    REPLACE HYBRID BATTERY THERMISTOR Click here

    NG

    REPAIR HARNESS OR CONNECTOR

  6. CHECK HARNESS AND CONNECTOR (VM0 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. B001LS9E02

      Disconnect connector Q14 from the battery cooling blower assembly.

    3. Turn the power switch on (IG).

    4. B001L0KE02
      Text in Illustration
      *a

      Front 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
      Q14-2 (VM0) - Q14-4 (GND0) Power switch on (IG) Below 5 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 battery cooling blower assembly connector.


    OK

    REPLACE BATTERY COOLING BLOWER ASSEMBLY Click here

    NG

  7. 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. B001LS9E02

      Disconnect connector Q14 from the battery cooling blower assembly.

    3. B001N1JE01

      Disconnect connector i1 from the battery smart unit.

    4. B001KWFE02
      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
      Q14-2 (VM0) and i1-7 (VM) - Other terminal Power switch off 10 kΩ or higher

    5. Connect the battery smart unit connector.

    6. Connect the battery cooling blower assembly connector.


    OK

    REPLACE BATTERY SMART UNIT Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR