HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A9D-123, P0A9E-123, P0AC7-123, P0AC8-123, P0ACC-123, P0ACD-123

DTC Code DTC Name
P0A9D-123 Hybrid Battery Temperature Sensor "A" Circuit Low
P0A9E-123 Hybrid Battery Temperature Sensor "A" Circuit High
P0AC7-123 Hybrid Battery Temperature Sensor "B" Circuit Low
P0AC8-123 Hybrid Battery Temperature Sensor "B" Circuit High
P0ACC-123 Hybrid Battery Temperature Sensor "C" Circuit Low
P0ACD-123 Hybrid Battery Temperature Sensor "C" Circuit High

DESCRIPTION

DTC No. INF Code DTC Detection Condition Trouble Area

P0A9D

P0A9E

P0AC7

P0AC8

P0ACC

P0ACD

 123 When the temperature of the battery temperature sensor is less than the standard value (open) or higher than the standard value (shorted) (1 trip detection).

  • HV battery

  • Battery smart unit

  • Wire harness or connector

Tech Tips

After confirming that a DTC is output, use the Techstream to check "Temp of BATT TB 1 to 3" in the hybrid vehicle control system ECU data list.

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

MONITOR DESCRIPTION

If the temperature indicated by the battery temperature sensor is lower than the standard level (open), or is higher than the standard level (short), the battery smart unit interprets this as a sensor malfunction. If the battery smart unit detects that HV battery temperature is out of the normal range or its value is abnormal, the power management control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs

P0A9D (INF 123): Battery temperature sensor circuit malfunction (GND short)

P0A9E (INF 123): Battery temperature sensor circuit malfunction (open)

P0AC7 (INF 123): Battery temperature sensor circuit malfunction (GND short)

P0AC8 (INF 123): Battery temperature sensor circuit malfunction (open)

P0ACC (INF 123): Battery temperature sensor circuit malfunction (GND short)

P0ACD (INF 123): Battery temperature sensor circuit malfunction (open)
Required sensors / components Battery temperature sensor
Frequency of operation Continuous
Duration TMC's intellectual property
MIL operation TMC's intellectual property
Sequence of operation None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present TMC's intellectual property
Other conditions belong to TMC's intellectual property -

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property -

COMPONENT OPERATING RANGE

Battery smart unit

DTC P0A9D (INF 123) is not detected

DTC P0A9E (INF 123) is not detected

DTC P0AC7 (INF 123) is not detected

DTC P0AC8 (INF 123) is not detected

DTC P0ACC (INF 123) is not detected

DTC P0ACD (INF 123) is not detected

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.

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

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

  4. Turn the power switch off.

  5. Turn the power switch on (READY) and turn the Techstream on.

  6. Perform the universal trip.

  7. Enter the following menus: Powertrain / HV / Trouble Codes.

  8. Check that permanent DTCs are cleared.

    Tech Tips

    • If a permanent DTC is output, the system is malfunctioning.

    • If no permanent DTC is output, the system is normal.

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 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

    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 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. READ VALUE USING TECHSTREAM

    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Temp of Batt TB 1 to 3.

      Tech Tips

      Compare the temperature of the 3 battery temperature sensors to determine the sensor with the malfunction (Temp of Batt TB1 to TB3).

    4. Turn the power switch off.

    NEXT

  3. CHECK CONNECTOR CONNECTION CONDITION

    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 connections of the z8 connector of the battery smart unit.

      A011YVIE01
      OK
      The connectors are connected securely and there are no contact problems.

    4. Install the front luggage compartment trim cover.

    NG

    CONNECT SECURELY

    OK

  4. CHECK HV BATTERY (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. Disconnect connectors z8 and N18 from the battery smart unit.

    4. Measure the resistance of the circuit for the malfunctioning sensor (battery temperature sensor 0 to 2).

      A011VDNE01
      Tester Connection
      Tester Connection Battery Temperature Sensor No.
      z8-4 (TBO) - z8-10 (GBO) 0
      z8-3 (TB1) - z8-9 (GB1) 1
      z8-2 (TB2) - z8-8 (GB2) 2
      Standard Resistance
      Thermistor Temperature Switch Condition Specified Condition
      0 °C (32 °F) Power switch off 26.7 to 27.8 kΩ
      25 °C (77 °F) Power switch off 9.9 to 10.1 kΩ
      40 °C (104 °F) Power switch off 5.73 to 5.92 kΩ
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Battery Smart Unit)

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

      A011W6VE05
      Standard Resistance
      Tester Connection Switch Condition Standard Resistance
      z8-4 (TBO) - N18-3 (IGCT) Power switch off 10 kΩ or more
      z8-4 (TBO) - N18-6 (GND) Power switch off 10 kΩ or more
      z8-10 (GBO) - N18-3 (IGCT) Power switch off 10 kΩ or more
      z8-10 (GBO) - N18-6 (GND) Power switch off 10 kΩ or more
      z8-3 (TB1) - N18-3 (IGCT) Power switch off 10 kΩ or more
      z8-3 (TB1) - N18-6 (GND) Power switch off 10 kΩ or more
      z8-9 (GB1) - N18-3 (IGCT) Power switch off 10 kΩ or more
      z8-9 (GB1) - N18-6 (GND) Power switch off 10 kΩ or more
      z8-2 (TB2) - N18-3 (IGCT) Power switch off 10 kΩ or more
      z8-2 (TB2) - N18-6 (GND) Power switch off 10 kΩ or more
      z8-8 (GB2) - N18-3 (IGCT) Power switch off 10 kΩ or more
      z8-8 (GB2) - N18-6 (GND) Power switch off 10 kΩ or more
      z8-1 (TCO) - N18-3 (IGCT) Power switch off 10 kΩ or more
      z8-1 (TCO) - N18-6 (GND) Power switch off 10 kΩ or more
      z8-7 (GCO) - N18-3 (IGCT) Power switch off 10 kΩ or more
      z8-7 (GCO) - N18-6 (GND) Power switch off 10 kΩ or more
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Battery Smart Unit)

    6. Connect the battery smart unit connectors.

    7. Install the front luggage compartment trim cover.

    NG

    Click here

    OK

    REPLACE BATTERY SMART UNIT Click here

  5. CHECK HARNESS AND CONNECTOR (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 front luggage compartment trim cover Click here.

    3. Check the wire harness and connectors of the battery 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 OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HV BATTERY Click here