HYBRID BATTERY SYSTEM, Diagnostic DTC:P0AAE-123, P0AAF-123

DTC Code DTC Name
P0AAE-123 Hybrid Battery Pack Air Temperature Sensor "A" Circuit Low
P0AAF-123 Hybrid Battery Pack Air Temperature Sensor "A" Circuit High

DESCRIPTION


DTC No. DTC Detection Condition Trouble Area

P0AAE-123

P0AAF-123

 When the temperature indicated by the inlet air temperature sensor is lower than a predetermined limit (open circuit) or is higher than a predetermined limit (short circuit)

  • Hybrid battery thermistor

  • Battery smart unit

  • Wire harness or connector

  • Hybrid battery junction block

Tech Tips

After confirming that DTC P0AAE-123 or P0AAF-123 is output, use the intelligent tester to check "Inhaling Air Temp" in the HV ECU data list.

Displayed Temperature Malfunction
-45°C (-49°F) or less Open or +B short circuit
95°C (203°F) or more GND short

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A9D-123 Click here.

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.

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 / Trouble Codes.

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

    3. Check installation of inlet air temperature sensor


      1. Check the connections of connector z5 of the battery smart unit.

        A003TSJE09
        OK
        The connectors are connected securely and there are no contact problems.
        Result
        Result Proceed to
        NG B
        OK Go to next step

      2. Visually check the installation condition of the inlet air temperature sensor.

        A003UJP
        OK
        The inlet air temperature sensor is installed in the correct location and its claws are engaged securely.
        Result
        Result Proceed to
        The inlet air temperature sensor is installed in the correct location and its claws are engaged securely. A
        Claws are damaged. C
        Inlet air temperature sensor is not installed correctly, but claws are not damaged. D

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


    B

    CONNECT SECURELY

    C

    REPLACE HYBRID BATTERY THERMISTOR Click here

    D

    INSTALL PARTS CORRECTLY

    A

  3. CHECK HYBRID BATTERY THERMISTOR (INLET AIR TEMPERATURE SENSOR AND BATTERY 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. Remove the No. 1 hybrid vehicle battery carrier bracket sub-assembly Click here.

    3. A003TSJE08

      Disconnect connectors d1 and z5 from the battery smart unit.

    4. A003V00E04
      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 Condition Specified Condition
      z5-1 (TC0) - z5-7 (GC0) 0°C (32°F) 26.7 to 27.8 kΩ
      25°C (77°F) 9.9 to 10.1 kΩ
      40°C (104°F) 5.73 to 5.92 kΩ

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      z5-1 (TC0) - d1-4 (IGCT) Power switch off 10 kΩ or higher
      z5-1 (TC0) - d1-8 (GND) Power switch off 10 kΩ or higher
      z5-7 (GC0) - d1-4 (IGCT) Power switch off 10 kΩ or higher
      z5-7 (GC0) - d1-8 (GND) Power switch off 10 kΩ or higher

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      z5-6 (TB0) - d1-4 (IGCT) Power switch off 10 kΩ or higher
      z5-6 (TB0) - d1-8 (GND) Power switch off 10 kΩ or higher
      z5-12 (GB0) - d1-4 (IGCT) Power switch off 10 kΩ or higher
      z5-12 (GB0) - d1-8 (GND) Power switch off 10 kΩ or higher
      z5-5 (TB1) - d1-4 (IGCT) Power switch off 10 kΩ or higher
      z5-5 (TB1) - d1-8 (GND) Power switch off 10 kΩ or higher
      z5-11 (GB1) - d1-4 (IGCT) Power switch off 10 kΩ or higher
      z5-11 (GB1) - d1-8 (GND) Power switch off 10 kΩ or higher
      z5-4 (TB2) - d1-4 (IGCT) Power switch off 10 kΩ or higher
      z5-4 (TB2) - d1-8 (GND) Power switch off 10 kΩ or higher
      z5-10 (GB2) - d1-4 (IGCT) Power switch off 10 kΩ or higher
      z5-10 (GB2) - d1-8 (GND) Power switch off 10 kΩ or higher

    7. Connect the battery smart unit connectors.

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


    NG

    Click here

    OK

  4. CHECK BATTERY SMART UNIT (VIB VOLTAGE)

    Note

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

    3. 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.

    4. A003RR2E05
      Text in Illustration
      *a

      Component with harness connected

      (Battery Smart Unit)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      d1-5 (VIB) - d1-6 (GIB) Power switch on (IG) 4.6 to 5.4 V

    5. Turn the power switch off.

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


    NG

    Click here

    OK

    REPLACE BATTERY SMART UNIT Click here

  5. CHECK HYBRID BATTERY JUNCTION BLOCK

    Note

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

    3. A003RUME01

      Disconnect connector d4 from the hybrid battery junction block.

    4. Turn the power switch on (IG).

      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. A003U8TE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Hybrid Battery Junction Block)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      d4-1 (VIB) - d4-2 (GIB) Power switch on (IG) 4.6 to 5.4 V

    6. Turn the power switch off.

    7. Connect the hybrid battery junction block connector.

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


    NG

    Click here

    OK

    REPLACE HYBRID BATTERY JUNCTION BLOCK Click here

  6. CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - HYBRID BATTERY JUNCTION BLOCK)

    Note

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

    3. A003TSJE07

      Disconnect connector d1 from the battery smart unit.

    4. A003RUME01

      Disconnect connector d4 from the hybrid battery junction block.

    5. A003T6GE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Battery Smart Unit)
      *b

      Front view of wire harness connector

      (to Hybrid Battery Junction Block)

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

      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition
      d1-1 (IB) - d4-3 (IB) Power switch off Below 1 Ω
      d1-6 (GIB) - d4-2 (GIB) Power switch off Below 1 Ω
      d1-5 (VIB) - d4-1 (VIB) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      d1-1 (IB) or d4-3 (IB) - Body ground and other terminals Power switch off 10 kΩ or higher
      d1-6 (GIB) or d4-2 (GIB) - Body ground and other terminals Power switch off 10 kΩ or higher
      d1-5 (VIB) or d4-1 (VIB) - Body ground and other terminals Power switch off 10 kΩ or higher

    6. Connect the battery smart unit connector.

    7. Connect the hybrid battery junction block connector.

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BATTERY SMART UNIT Click here

  7. 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. Remove the upper hybrid battery cover sub-assembly Click here.

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

      A003UMS
      Specified Condition
      There are no open or short circuits in the wire harness and connectors. There are no short circuits to other wire harnesses.

    4. Install the upper hybrid battery cover sub-assembly Click here.


    NG

    REPAIR HARNESS OR CONNECTOR

    OK

    REPLACE HYBRID BATTERY THERMISTOR Click here