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. DTC Detection Condition Trouble Area

P0A9D-123

P0A9E-123

P0AC7-123

P0AC8-123

P0ACC-123

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).

  • Hybrid battery thermistor

  • Battery smart unit

  • Wire harness or connector

  • Hybrid battery junction block

Tech Tips

After confirming that a DTC is output, use the intelligent tester 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

WIRING DIAGRAM

A01J8IEE07

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 disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

    Tech Tips

    At least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note

After the power switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the power switch off, make sure to wait at least 60 seconds before disconnecting the cable from the negative (-) battery terminal.

PROCEDURE


  1. CHECK DTC OUTPUT (DTC P0AFC-123 IS OUTPUT)


    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. Read output DTCs Click here.

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

    5. Disconnect the intelligent tester from the DLC3.


    B

    GO TO DTC CHART

    A

  2. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester 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).


    NEXT

  3. CHECK CONNECTOR CONNECTION CONDITION

    CAUTION:

    Be sure to wear insulated gloves.


    1. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

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

    4. A01J9DNE02

      Check the connections of the z17 connector of the battery smart unit.

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

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

    6. Connect the cable to the negative (-) battery terminal.


    NG

    CONNECT SECURELY

    OK

  4. CHECK HYBRID BATTERY THERMISTOR (BATTERY TEMPERATURE SENSOR)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

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

    4. A01J9DNE01

      Disconnect the z17 and c1 connectors of the battery smart unit.

    5. A01JBSAE01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Battery Smart Unit)

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

      Tester Connection
      Tester Connection Battery Temperature Sensor No.
      z17-6 (TB0) - z17-12 (GB0) 0
      z17-5 (TB1) - z17-11 (GB1) 1
      z17-4 (TB2) - z17-10 (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
    6. A01JBDME01
      Text in Illustration
      *1

      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 Switch Condition Standard Resistance
      z17-6 (TB0) - c1-4 (IGCT) Power switch off 10 kΩ or more
      z17-6 (TB0) - c1-8 (GND) Power switch off 10 kΩ or more
      z17-12 (GB0) - c1-4 (IGCT) Power switch off 10 kΩ or more
      z17-12 (GB0) - c1-8 (GND) Power switch off 10 kΩ or more
      z17-5 (TB1) - c1-4 (IGCT) Power switch off 10 kΩ or more
      z17-5 (TB1) - c1-8 (GND) Power switch off 10 kΩ or more
      z17-11 (GB1) - c1-4 (IGCT) Power switch off 10 kΩ or more
      z17-11 (GB1) - c1-8 (GND) Power switch off 10 kΩ or more
      z17-4 (TB2) - c1-4 (IGCT) Power switch off 10 kΩ or more
      z17-4 (TB2) - c1-8 (GND) Power switch off 10 kΩ or more
      z17-10 (GB2) - c1-4 (IGCT) Power switch off 10 kΩ or more
      z17-10 (GB2) - c1-8 (GND) Power switch off 10 kΩ or more
      z17-1 (TC0) - c1-4 (IGCT) Power switch off 10 kΩ or more
      z17-1 (TC0) - c1-8 (GND) Power switch off 10 kΩ or more
      z17-7 (GC0) - c1-4 (IGCT) Power switch off 10 kΩ or more
      z17-7 (GC0) - c1-8 (GND) Power switch off 10 kΩ or more

    7. Connect the z17 and c1 connectors of the battery smart unit.

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

    9. Connect the cable to the negative (-) battery terminal.


    NG

    Click here

    OK

  5. CHECK BATTERY SMART UNIT (VIB VOLTAGE)

    Note

    Be sure to wear insulated gloves.


    1. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

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

    4. Connect the cable to the negative (-) battery terminal.

    5. 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 (P0A0D-350) to be set. Use the intelligent tester to clear the DTCs Click here.

    6. A01JBYOE01
      Text in Illustration
      *1

      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
      c1-5 (VIB) - c1-6 (GIB) Power switch on (IG) 4.6 to 5.4 V

    7. Turn the power switch off.

    8. Disconnect the cable from the negative (-) battery terminal.

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

    10. Connect the cable to the negative (-) battery terminal.


    NG

    CHECK HYBRID BATTERY JUNCTION BLOCK Click here

    OK

    REPLACE BATTERY SMART UNIT Click here

  6. CHECK HYBRID BATTERY JUNCTION BLOCK

    Note

    Be sure to wear insulated gloves.


    1. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

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

    4. Disconnect the c4 battery current sensor connector from the hybrid battery junction block.

    5. Connect the cable to the negative (-) battery terminal.

    6. Turn the power switch on (IG).

      Note

      Turning the power switch on (IG) with the HV relay assembly (battery current sensor) connector disconnected causes DTC P0AC2-123 to be set. Use the intelligent tester to clear the DTCs Click here.

    7. A01JBQLE01
      Text in Illustration
      *1

      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
      c4-1 (VIB) - c4-2 (GIB) Power switch on (IG) 4.6 to 5.4 V

    8. Turn the power switch off.

    9. Connect the c4 battery current sensor connector to the hybrid battery junction block.

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


    NG

    CHECK HARNESS AND CONNECTOR (BATTERY SMART UNIT - HYBRID BATTERY JUNCTION BLOCK) Click here

    OK

    REPLACE HYBRID BATTERY JUNCTION BLOCK Click here

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

    Note

    Be sure to wear insulated gloves.


    1. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

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

    4. A01J9DNE03

      Disconnect only the c1 connector of the battery smart unit.

    5. Disconnect the c4 battery current sensor connector from the hybrid battery junction block.

    6. A01J8EXE01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Battery Smart Unit)
      *2

      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
      c1-1 (IB) - c4-3 (IB) Power switch off Below 1 Ω
      c1-6 (GIB) - c4-2 (GIB) Power switch off Below 1 Ω
      c1-5 (VIB) - c4-1 (VIB) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      c1-1 (IB) or c4-3 (IB) - Body ground and other terminals Power switch off 10 kΩ or higher
      c1-6 (GIB) or c4-2 (GIB) - Body ground and other terminals Power switch off 10 kΩ or higher
      c1-5 (VIB) or c4-1 (VIB) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Connect the c1 connector to the battery smart unit.

    8. Connect the c4 battery current sensor connector to the hybrid battery junction block.

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

    10. Connect the cable to the negative (-) battery terminal.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BATTERY SMART UNIT Click here

  8. CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR)

    CAUTION:

    Be sure to wear insulated gloves and protective goggles.


    1. Disconnect the cable from the negative (-) battery terminal.

    2. 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.

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

    4. 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.

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

    6. Connect the cable to the negative (-) battery terminal.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HYBRID BATTERY THERMISTOR Click here