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HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A85-123

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

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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).

Tip:

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).

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PROCEDURE


  1. Click here

    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.


  2. Click here

    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. A003ZIFE12

      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
      Table 1. Text in Illustration
      *a

      Component with harness connected

      (Battery Cooling Blower Assembly)
      Tip:

      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.


  3. Click here

    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. A003WUPE17

      Disconnect connectors i1 and z10 from the battery smart unit.

    3. A003W5ME09

      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
      Table 2. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Battery Smart Unit)

    4. Connect the battery smart unit connectors.


  4. Click here

    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. A003WZK

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

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

  5. Click here

    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. A003W1YE02

      Disconnect connector Q14 from the battery cooling blower assembly.

    3. Turn the power switch on (IG).

    4. A003W21E09

      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
      Table 3. Text in Illustration
      *a

      Front view of wire harness connector

      (to Battery Cooling Blower Assembly)
      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.


  6. Click here

    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

      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
      Table 4. 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)

    5. Connect the battery smart unit connector.

    6. Connect the battery cooling blower assembly connector.


  7. Click here

    GO TO DTC CHARTClick here

  8. Click here

    REPLACE HYBRID BATTERY THERMISTORClick here

  9. Click here

    REPLACE BATTERY SMART UNITClick here

  10. Click here

    REPLACE BATTERY COOLING BLOWER ASSEMBLYClick here

  11. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. Click here

    REPAIR HARNESS OR CONNECTOR