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. INF Code DTC Detection Condition Trouble Area

P0AAE

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)

  • HV battery

  • Battery smart unit

  • Wire harness or connector

Tech Tips

After confirming that DTC P0AAE-123 or P0AAF-123 is output, use the Techstream 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 P0A9C-123 Click here.

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.

  • When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

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 FOR DTCS (HV)

    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

    4. Read output DTCs Click here.

      Result
      Result Proceed to
      P0AFC-123 is not output. A
      P0AFC-123 is also output. B

    5. Turn the power switch off.

    6. Disconnect the Techstream from the DLC3.

    B

    GO TO DTC CHART (P0AFC-123) Click here

    A

  2. CHECK INSTALLATION OF INLET AIR 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 front luggage compartment trim cover Click here.

    3. Check installation of inlet air temperature sensor.

      1. Check the connections of the z8 connector of the battery smart unit.

        A011YVIE01
        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.

        A011XA7
        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 front luggage compartment trim cover.

    B

    CONNECT SECURELY

    C

    REPLACE HV BATTERY Click here

    D

    INSTALL PARTS CORRECTLY

    A

  3. CHECK HV BATTERY (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 front luggage compartment trim cover Click here.

    3. Remove the rear side seat back assembly LH.

    4. Disconnect connectors N18 and z8 from the battery smart unit.

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

      A011W6VE05
      Standard Resistance
      Tester Connection Condition Specified Condition
      z8-1 (TCO) - z8-7 (GCO) 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
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Battery Smart Unit)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      z8-1 (TCO) - N18-3 (IGCT) Power switch off 10 kΩ or higher
      z8-1 (TCO) - N18-6 (GND) Power switch off 10 kΩ or higher
      z8-7 (GCO) - N18-3 (IGCT) Power switch off 10 kΩ or higher
      z8-7 (GCO) - N18-6 (GND) Power switch off 10 kΩ or higher

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      z8-4 (TBO) - N18-3 (IGCT) Power switch off 10 kΩ or higher
      z8-4 (TBO) - N18-6 (GND) Power switch off 10 kΩ or higher
      z8-10 (GBO) - N18-3 (IGCT) Power switch off 10 kΩ or higher
      z8-10 (GBO) - N18-6 (GND) Power switch off 10 kΩ or higher
      z8-3 (TB1) - N18-3 (IGCT) Power switch off 10 kΩ or higher
      z8-3 (TB1) - N18-6 (GND) Power switch off 10 kΩ or higher
      z8-9 (GB1) - N18-3 (IGCT) Power switch off 10 kΩ or higher
      z8-9 (GB1) - N18-6 (GND) Power switch off 10 kΩ or higher
      z8-2 (TB2) - N18-3 (IGCT) Power switch off 10 kΩ or higher
      z8-2 (TB2) - N18-6 (GND) Power switch off 10 kΩ or higher
      z8-8 (GB2) - N18-3 (IGCT) Power switch off 10 kΩ or higher
      z8-8 (GB2) - N18-6 (GND) Power switch off 10 kΩ or higher

    8. Connect the battery smart unit connectors.

    9. Install the rear side seat back assembly LH.

    10. Install the front luggage compartment trim cover.

    NG

    CHECK HARNESS AND CONNECTOR (INLET AIR TEMPERATURE SENSOR AND BATTERY TEMPERATURE SENSOR) Click here

    OK

    REPLACE BATTERY SMART UNIT Click here

  4. CHECK HARNESS AND CONNECTOR (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 front luggage compartment trim cover 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.

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

      Tech Tips

      Because the battery harness is not available as a supply part, if the harness cannot be repaired, replace the HV battery assembly.

    4. Install the front luggage compartment trim cover.

    NG

    REPAIR HARNESS OR CONNECTOR

    OK

    REPLACE HV BATTERY Click here