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

A battery current sensor is installed to the positive (+) cable side of the HV battery and detects current flowing from the HV battery. The battery current sensor outputs voltage, which changes between 0 and 5 V according to the detected amperage, to the IB terminal of the battery voltage sensor. The battery voltage sensor sends signals to the hybrid vehicle control ECU. The hybrid vehicle control ECU determines the charging and discharging amount of the HV battery based on the received signals and calculates the SOC of the HV battery through the accumulated amperage.

A304993E02

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0ABF-123

Hybrid Battery Pack Current Sensor Circuit

Power source voltage of the battery current sensor is excessively low/high.

(1 trip detection logic)

  • Battery voltage sensor

  • Hybrid battery junction block assembly

  • Wire harness or connector

Comes on

Master Warning Light:

Comes on

P0AC1-123

Hybrid Battery Pack Current Sensor Circuit Low

The battery current sensor output value is excessively low.

(1 trip detection logic)

  • Battery voltage sensor

  • Hybrid battery junction block assembly

  • Wire harness or connector

Comes on

Master Warning Light:

Comes on

P0AC2-123

Hybrid Battery Pack Current Sensor Circuit High

The battery current sensor output value is excessively high.

(1 trip detection logic)

  • Battery voltage sensor

  • Hybrid battery junction block assembly

  • Wire harness or connector

Comes on

Master Warning Light:

Comes on
Table 1. Related Data List

DTC No.

Data List

  • P0ABF-123

  • P0AC1-123

  • P0AC2-123

Batt Pack Current Val

WIRING DIAGRAM

A311271E17

CAUTION / NOTICE / HINT

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

    Tip:

    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.

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Tip:

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. Turn the power switch on (IG) and wait for 10 seconds or more.

PROCEDURE

  1. CHECK DTC OUTPUT (HYBRID CONTROL)

    Click hereClick here

    Result

    Result

    Proceed to

    P0AFC-123 is not output.

    A

    P0AFC-123 is also output.

    B
    B

    GO TO DTC CHART (P0AFC-123)

    Click here

    A

  2. CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE)

    Click here

    Result

    Proceed to

    OK

    NG
    NG

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

    OK

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

    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 vehicle battery shield reinforcement.

      Click here

    3. Disconnect the HV battery high voltage connector from the hybrid battery junction block assembly.

      Note:

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

    4. C297248E04

      Disconnect the z13 battery current sensor connector from the hybrid battery junction block assembly.

      Note:

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

    5. Disconnect the battery voltage sensor connector.

      Note:

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

    6. A321039C05

      *a

      Rear view of wire harness connector

      (to Battery Voltage Sensor)

      *b

      Front view of wire harness connector

      (to Battery Current Sensor (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

      z12-9 (IB) - z13-3 (IB)

      Power switch off

      Below 1 Ω

      z12-20 (GIB) - z13-2 (GIB)

      Power switch off

      Below 1 Ω

      z12-10 (VIB) - z13-1 (VIB)

      Power switch off

      Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection

      Condition

      Specified Condition

      z12-9 (IB) or z13-3 (IB) - Body ground and other terminals

      Power switch off

      10 kΩ or higher

      z12-20 (GIB) or z13-2 (GIB) - Body ground and other terminals

      Power switch off

      10 kΩ or higher

      z12-10 (VIB) or z13-1 (VIB) - Body ground and other terminals

      Power switch off

      10 kΩ or higher
      Note:

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

      Tip:

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

    7. Reconnect the battery voltage sensor connector.

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

    9. Reconnect the HV battery high voltage connector to the hybrid battery junction block assembly.

    10. Install the No. 2 hybrid vehicle battery shield reinforcement.

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR HARNESS OR CONNECTOR (BATTERY CURRENT SENSOR)

    OK

  4. CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE)

    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 vehicle battery shield reinforcement.

      Click here

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

    4. Turn the power switch on (IG).

    5. A321038C21

      *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

      z12-10 (VIB) - z12-20 (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 vehicle battery shield reinforcement.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE BATTERY VOLTAGE SENSOR

    Click here

    OK

  5. CHECK BATTERY VOLTAGE SENSOR (BATTERY CURRENT SENSOR OUTPUT VOLTAGE)

    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 vehicle battery shield reinforcement.

      Click here

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

    4. Turn the power switch on (IG).

    5. A321038C22

      *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

      z12-9 (IB) - z12-20 (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 vehicle battery shield reinforcement.

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE BATTERY VOLTAGE SENSOR

    Click here

    NG

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

    Click here