HYBRID CONTROL SYSTEM, Diagnostic DTC:P0AAC11, P0AAC15

DTC Code DTC Name
P0AAC11 Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground
P0AAC15 Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open

DESCRIPTION

The inlet air temperature sensor (battery) is mounted on the HV battery. The resistance of the sensor varies in accordance with changes in the intake air temperature. The characteristics of the inlet air temperature sensor are the same as those of the battery temperature sensors Click here. The battery voltage sensor uses signals from the inlet air temperature sensor to control the air volume of the battery cooling blower assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0AAC11 Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground

The inlet air temperature sensor output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value.

(1 trip detection logic)

  • Hybrid battery thermistor

  • Battery voltage sensor

  • Wire harness or connector

 Does not come on

Master Warning Light:

Comes on
P0AAC15 Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open

The inlet air temperature sensor output voltage is higher than the standard value (short to +B or open) and the detected temperature is lower than the specified value.

(1 trip detection logic)

  • Hybrid battery thermistor

  • Battery voltage sensor

  • Wire harness or connector

 Does not come on

Master Warning Light:

Comes on

Tech Tips

After checking for the above DTCs, check the hybrid system Data List item "Hybrid Battery Cooling Fan Intake Air Temperature 1" using the GTS.

Displayed Temperature Malfunction
-45°C (-49°F) or less Open or +B short circuit
95°C (203°F) or more GND short
Related Data List
DTC No. Data List
P0AAC11 Hybrid Battery Cooling Fan Intake Air Temperature 1
P0AAC15

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the GTS on.

  6. With power switch on (IG) and wait for 5 seconds or more.

  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  8. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A9B2A.

Click here

CAUTION / NOTICE / HINT

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 DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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


      Powertrain > Hybrid Control > Trouble Codes

    4. Check for DTCs.

      Result
      Result Proceed to
      P0AFC00, P0AFC96 or P308A12 is output A
      Other than above B

    5. Turn the power switch off.


    A

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    B

  2. CHECK CONNECTOR CONNECTION CONDITION (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 battery exhaust duct.

      Tech Tips

      Click here

    3. B004Q62N05

      Check the connections of the z9 battery voltage sensor connector.

      Tech Tips

      Click here

      OK
      The connector is connected securely and there are no contact problems.
      Result
      Result
      OK
      NG

    4. Install the No. 1 hybrid battery exhaust duct.


    NG

    CONNECT SECURELY

    OK

  3. 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 HV battery junction block assembly.

      Tech Tips

      Click here

    3. B004OX0

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

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

    4. Install the HV battery junction block assembly.


    B

    REPLACE HYBRID BATTERY THERMISTOR Click here

    C

    INSTALL PARTS CORRECTLY

    A

  4. CHECK HV BATTERY (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 battery exhaust duct.

      Tech Tips

      Click here

    3. Disconnect the z9 battery voltage sensor connector.

      Note

      Before disconnecting the connector, check that it is not loose or disconnected.

    4. B004PXQC07
      *a

      Rear view of wire harness connector

      (to Battery Voltage Sensor)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z9-1 (TC0) - z9-7 (GC0)

      Power switch off

      0°C (32°F)

      		 26.7 to 27.8 kΩ
      z9-1 (TC0) - z9-7 (GC0)

      Power switch off

      25°C (77°F)

      		 9.9 to 10.1 kΩ
      z9-1 (TC0) - z9-7 (GC0)

      Power switch off

      40°C (104°F)

      		 5.73 to 5.92 kΩ

      Note

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    5. Disconnect the M35 battery voltage sensor connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z9-1 (TC0) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-1 (TC0) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-7 (GC0) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-7 (GC0) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-4 (TB0) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-4 (TB0) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-10 (GB0) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-10 (GB0) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-3 (TB1) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-3 (TB1) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-9 (GB1) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-9 (GB1) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-2 (TB2) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-2 (TB2) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-8 (GB2) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-8 (GB2) - M35-5 (GND) Power switch off 10 kΩ or higher

    7. Reconnect the M35 and z9 battery voltage sensor connectors.

    8. Install the No. 1 hybrid battery exhaust duct.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BATTERY VOLTAGE SENSOR Click here

    NG

  5. CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR AND 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 upper No. 1 hybrid battery cover sub-assembly.

      Tech Tips

      Click here

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

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

      Tech Tips

      As the wire harness of the battery temperature sensors is not available as a supply part, if it cannot be repaired, replace the HV battery.

    4. Install the upper No. 1 hybrid battery cover sub-assembly.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID BATTERY THERMISTOR Click here

    NG

    REPAIR HARNESS OR CONNECTOR (INLET AIR TEMPERATURE SENSOR)