HYBRID BATTERY SYSTEM, Diagnostic DTC:P0ABF-123, P0AC1-123, P0AC2-123

DTC Code DTC Name
P0ABF-123 Hybrid Battery Pack Current Sensor Circuit
P0AC1-123 Hybrid Battery Pack Current Sensor Circuit Low
P0AC2-123 Hybrid Battery Pack Current Sensor Circuit High

DESCRIPTION

The battery current sensor, which is mounted on the positive cable side of the HV battery, detects the amperage that flows into the HV battery. The battery voltage sensor receives a voltage, which varies between 0 and 5 V in proportion to the amperage, at its IB terminal from the battery current sensor. An output voltage of the battery current sensor below 2.5 V indicates that the HV battery is being charged, and above 2.5 V indicates that the HV battery is being discharged. The hybrid vehicle control ECU assembly determines the charging and discharging amperage of the HV battery based on the signals that are input to its IB terminal from the battery voltage sensor, and calculates the SOC (state of charge) of the HV battery through the accumulated amperage.


DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0ABF-123 Hybrid Battery Pack Current Sensor Circuit When the battery current sensor is abnormal (1 trip detection)

  • Hybrid battery junction block assembly

  • Battery voltage sensor

  • Wire harness or connector

 Comes on Comes on
P0AC1-123 Hybrid Battery Pack Current Sensor Circuit Low When the battery current sensor is abnormal (1 trip detection)

  • Hybrid battery junction block assembly

  • Battery voltage sensor

  • Wire harness or connector

 Comes on Comes on
P0AC2-123 Hybrid Battery Pack Current Sensor Circuit High When the battery current sensor is abnormal (1 trip detection)

  • Hybrid battery junction block assembly

  • Battery voltage sensor

  • Wire harness or connector

 Comes on Comes on

WIRING DIAGRAM

A01KRQ7E02
*a Battery Current Sensor (Hybrid Battery Junction Block Assembly)
*b Battery Voltage Sensor

Refer to the wiring diagram for DTC P0AFC-123.

Click here

INSPECTION PROCEDURE

CAUTION:


  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, 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.

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)

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

    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Read output DTCs.


      Powertrain > Hybrid Control > Trouble Codes
      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 GTS from the DLC3.


    B

    GO TO DTC CHART (P0AFC-123) Click here

    A

  2. CHECK BATTERY VOLTAGE SENSOR (IGCT VOLTAGE)

    Result
    Proceed to
    OK
    NG

    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. 2 hybrid battery intake duct.

      Click here

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Turn the power switch on (IG).

    5. A01KRXYC07
      *a

      Component with harness connected

      (Battery Voltage Sensor)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L48-3 (IGCT) - L48-6 (GND) Power switch on (IG) 11 to 14 V

      Note

      Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

      Tech Tips

      As there might be an intermittent malfunction in the battery voltage sensor power source circuit, inspect the following even if the measured voltage is as specified:


      • Installation condition of fuse(s) (before removing fuse(s)) (IGCT circuit)

      • Fuse condition (before and after removing fuse(s)) (IGCT circuit)

      • Connection condition of connectors (IGCT circuit)

      • Wire harness condition (IGCT circuit)

      • Wire harness condition (GND circuit)

    6. Turn the power switch off.

    7. Disconnect the cable from the negative (-) auxiliary battery terminal.

    8. Install the No. 2 hybrid battery intake duct.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY VOLTAGE SENSOR POWER SOURCE CIRCUIT)

    OK

  3. CHECK HARNESS AND CONNECTOR (HYBRID BATTERY JUNCTION BLOCK ASSEMBLY - BATTERY VOLTAGE SENSOR)

    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. 2 hybrid battery intake duct.

      Click here

    3. Remove the hybrid battery cover sub-assembly RH.

      Click here

    4. Disconnect only the z8 battery voltage sensor connector.

    5. A01KU12N01

      Disconnect the z9 battery current sensor connector from the hybrid battery junction block assembly.

    6. A01KS5ZC03
      *a

      Rear view of wire harness connector

      (to Battery Voltage Sensor)
      *b

      Front view of wire harness connector

      (to Hybrid Battery Junction Block Assembly)

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      z8-5 (IB) - z9-3 (IB) Power switch off Below 1 Ω
      z8-12 (GIB) - z9-2 (GIB) Power switch off Below 1 Ω
      z8-6 (VIB) - z9-1 (VIB) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      z8-5 (IB) or z9-3 (IB) - Body ground and other terminals Power switch off 10 kΩ or higher
      z8-12 (GIB) or z9-2 (GIB) - Body ground and other terminals Power switch off 10 kΩ or higher
      z8-6 (VIB) or z9-1 (VIB) - Body ground and other terminals Power switch off 10 kΩ or higher

      Tech Tips

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

    7. Reconnect the z8 battery voltage sensor connector.

    8. Reconnect the z9 battery current sensor connector to the hybrid battery junction block assembly.

    9. Install the hybrid battery cover sub-assembly RH.

    10. Install the No. 2 hybrid battery intake duct.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK BATTERY VOLTAGE SENSOR (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. 2 hybrid battery intake duct.

      Click here

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Turn the power switch on (IG).

    5. A01KTUJC05
      *a

      Component with harness connected

      (Battery Voltage Sensor)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      z8-6 (VIB) - z8-12 (GIB) Power switch on (IG) 4.6 to 5.4 V

      Note

      Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

    7. Disconnect the cable from the negative (-) auxiliary battery terminal.

    8. Install the No. 2 hybrid battery intake duct.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BATTERY VOLTAGE SENSOR Click here

    OK

  5. CHECK BATTERY VOLTAGE 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. 2 hybrid battery intake duct.

      Click here

    3. Connect the cable to the negative (-) auxiliary battery terminal.

    4. Turn the power switch on (IG).

    5. A01KTUJC06
      *a

      Component with harness connected

      (Battery Voltage Sensor)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      z8-5 (IB) - z8-12 (GIB) Power switch on (IG) 2.46 to 2.54 V

      Note

      Turning the power switch on (IG) with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

    7. Disconnect the cable from the negative (-) auxiliary battery terminal.

    8. Install the No. 2 hybrid battery intake duct.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BATTERY VOLTAGE SENSOR Click here

    NG

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY Click here