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

WIRING DIAGRAM

A003US8E03

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. 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. 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. A003TSJE09

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

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

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


    NG

    CONNECT SECURELY

    OK

  4. CHECK HYBRID BATTERY THERMISTOR (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 z5 and d1 from the battery smart unit.

    4. A003RKKE02
      Text in Illustration
      *a

      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.
      z5-6 (TB0) - z5-12 (GB0) 0
      z5-5 (TB1) - z5-11 (GB1) 1
      z5-4 (TB2) - z5-10 (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
    5. 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 Switch Condition Standard Resistance
      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
      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. Connect the battery smart unit connectors.

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


    NG

    Click here

    OK

  5. 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

    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. 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

    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. 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

  8. 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 upper hybrid battery cover sub-assembly Click here.

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

      A003RFD
      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 OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HYBRID BATTERY THERMISTOR Click here