Toyota Avalon (XX50): Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range (P0ABF2A). Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground (P0ABF11,P0ABF15,P1CBB12,P1CBB14). Hybrid/EV Battery Current Sensor "

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / Hybrid / Battery Control / Hybrid Control System / Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range (P0ABF2A). Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground (P0ABF11,P0ABF15,P1CBB12,P1CBB14). Hybrid/EV Battery Current Sensor "

Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range (P0ABF2A)

DESCRIPTION

Refer to the description for DTC P0ABF11.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0ABF2A

Hybrid/EV Battery Current Sensor "A" Signal Stuck In Range

The battery current sensor output is stuck even when battery voltage change.

(1 trip detection logic)
  • Battery voltage sensor
  • HV battery junction block assembly

Comes on

Master Warning Light:

Comes on
Related Data List

DTC No.

Data List

P0ABF2A

Hybrid Battery Current for Hybrid Battery Control*1

HINT:

*1: The value of "Hybrid Battery Current for Hybrid Battery Control" usually changes by 4 A or more while the vehicle is accelerating and decelerating.

MONITOR DESCRIPTION

If the battery voltage sensor detects a malfunction in the battery current sensor, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0AC0 (INF P0ABF2A): Current sensor malfunction

Required sensors/components

Battery current sensor

Frequency of operation

Continuous

Duration

TMC's intellectual property

MIL operation

1 driving cycle

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored

TMC's intellectual property

Other conditions belong to TMC's intellectual property

-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

Battery voltage sensor

DTC P0AC0 (INF P0ABF2A) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  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 and wait for 2 minutes or more.
  5. Turn the power switch on (IG) and turn the Techstream on.
  6. Drive the vehicle on urban roads for approximately 5 minutes.[*1]

    HINT:

    [*1]: Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  8. Check the DTC judgment result.

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

PROCEDURE

1.

CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check and record any HV system DTCs and freeze frame data.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

Only DTC P0ABF2A is output or DTC P0ABF2A and DTCs other than those in the following table are output.

A

DTC P0ABF2A and any of the DTCs in the following table are output at the same time.

B

Relevant DTC

P0A9563

High Voltage Fuse Accumulated Load History

P0ABF11

Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground

P0ABF15

Hybrid/EV Battery Current Sensor "A" Circuit Short to Auxiliary Battery or Open

P0AFC00

Hybrid/EV Battery Sensor Module

P0AFC96

Hybrid/EV Battery Sensor Module Component Internal Failure

P1CBB12

Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Auxiliary Battery

P1CBB14

Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Ground or Open

P308A12

Hybrid/EV Battery Voltage Sensor All Circuit Short to Auxiliary Battery

P0B3B14, P0B4014, P0B4514, P0B4A14, P0B4F14, P0B5414, P0B5914, P0B5E14, P0B6314, P0B6814, P0B6D14, P0B7214

Hybrid/EV Battery Voltage Sensor "A - L" Circuit Short to Ground or Open

(e) Turn the power switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

A

2.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

NOTICE:

Do not turn the power switch on (READY).

(c) Enter the following menus: Powertrain / Hybrid Control / Data List / Hybrid Battery Block 1 to 11 Voltage.

NOTICE:

Select "Hybrid Battery Block 1 to 11 Voltage" only. (Do not select any other Data List items.)

Powertrain > Hybrid Control > Data List

Tester Display

Hybrid Battery Block 1 Voltage

Hybrid Battery Block 2 Voltage

Hybrid Battery Block 3 Voltage

Hybrid Battery Block 4 Voltage

Hybrid Battery Block 5 Voltage

Hybrid Battery Block 6 Voltage

Hybrid Battery Block 7 Voltage

Hybrid Battery Block 8 Voltage

Hybrid Battery Block 9 Voltage

Hybrid Battery Block 10 Voltage

Hybrid Battery Block 11 Voltage

(d) Check the voltage of each "Battery Block Vol" of "Hybrid Battery Block 1 to 11 Voltage" in the Data List with the power switch on (IG).

Specified Condition:

Any "Battery Block Vol" changes by 0.3 V or more, 60 seconds after the power switch is turned on (IG). (The difference between the maximum and minimum voltage is 0.3 V or more.)

Result

Proceed to

The change in voltage of any "Hybrid Battery Block Voltage" is 0.3 V or more.

A

Other than above

B

(e) Turn the power switch off.

A

REPLACE BATTERY VOLTAGE SENSOR

B

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground (P0ABF11,P0ABF15,P1CBB12,P1CBB14)

DESCRIPTION

A battery current sensor is installed to the positive (+) terminal 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 IB0 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.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0ABF11

Hybrid/EV Battery Current Sensor "A" Circuit Short to Ground

The battery current sensor output voltage is excessively low.

(1 trip detection logic)
  • Battery voltage sensor
  • HV battery junction block assembly
  • Wire harness or connector

Comes on

Master Warning Light:

Comes on

P0ABF15

Hybrid/EV Battery Current Sensor "A" Circuit Short to Auxiliary Battery or Open

The battery current sensor output voltage is excessively high.

(1 trip detection logic)
  • Battery voltage sensor
  • HV battery junction block assembly
  • Wire harness or connector

Comes on

Master Warning Light:

Comes on

P1CBB12

Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Auxiliary Battery

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

(1 trip detection logic)
  • Battery voltage sensor
  • HV battery junction block assembly
  • Wire harness or connector

Comes on

Master Warning Light:

Comes on

P1CBB14

Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Ground or Open

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

(1 trip detection logic)
  • Battery voltage sensor
  • HV battery junction block assembly
  • Wire harness or connector

Comes on

Master Warning Light:

Comes on
Related Data List

DTC No.

Data List

P0ABF11

Hybrid Battery Current*1

P0ABF15

P1CBB12

P1CBB14

HINT:

*1: The value of "Hybrid Battery Current" will be approximately 0 A when the power switch is on (IG) (READY off).

MONITOR DESCRIPTION

If the battery voltage sensor detects a malfunction in the battery current sensor, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0AC1 (INF P0ABF11): Current sensor circuit malfunction (GND short)

P0AC2 (INF P0ABF15): Current sensor circuit malfunction (open)

P1CBD (INF P1CBB12): Power supply circuit for current sensor malfunction (+B short)

P1CBC (INF P1CBB14): Power supply circuit for current sensor malfunction (GND short)

Required sensors/components

Battery current sensor

Frequency of operation

Continuous

Duration

TMC's intellectual property

MIL operation

Immediately

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored

TMC's intellectual property

Other conditions belong to TMC's intellectual property

-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

Battery voltage sensor

DTC P0AC1 (INF P0ABF11) is not detected

DTC P0AC2 (INF P0ABF15) is not detected

DTC P1CBD (INF P1CBB12) is not detected

DTC P1CBC (INF P1CBB14) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  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 and wait for 2 minutes or more.
  5. Turn the power switch on (IG) and turn the Techstream on.
  6. With power switch on (IG) and wait for 10 seconds or more.[*1]

    HINT:

    [*1]: Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  8. Check the DTC judgment result.

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0AFC00.

Click here

CAUTION / NOTICE / HINT

CAUTION:

  • Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
    • Inspecting the high-voltage system
    • Disconnecting the low voltage connector of the inverter with converter assembly
    • Disconnecting the low voltage connector of the HV battery
  • To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
  • After removing the service plug grip from the HV battery, 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

    HINT:

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

    *a

    Without waiting for 10 minutes

NOTICE:

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)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

P0AFC00, P0AFC96 or P308A12 is not output.

A

P0AFC00, P0AFC96 or P308A12 is output.

B

(e) Turn the power switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

A

2.

CHECK BATTERY VOLTAGE SENSOR (IGCT VOLTAGE)

Click here

NG

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

3.

CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - HV BATTERY JUNCTION BLOCK ASSEMBLY)

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

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.

(b) Remove the No. 1 HV battery cover panel RH.

Click here

(c) Disconnect the y7 battery current sensor connector.

NOTICE:

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

(d) Remove the No. 1 hybrid battery exhaust duct.

Click here

(e) Disconnect the y6 battery voltage sensor connector.

NOTICE:

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

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

Standard Resistance (Check for Open):

Tester Connection

Condition

Specified Condition

y6-5 (IB0) - y7-4 (IB0)

Power switch off

Below 1 Ω

y6-12 (GIB) - y7-3 (GIB)

Power switch off

Below 1 Ω

y6-6 (VIB) - y7-1 (VIB)

Power switch off

Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection

Condition

Specified Condition

y6-5 (IB0) or y7-4 (IB0) - Body ground and other terminals

Power switch off

10 kΩ or higher

y6-12 (GIB) or y7-3 (GIB) - Body ground and other terminals

Power switch off

10 kΩ or higher

y6-6 (VIB) or y7-1 (VIB) - Body ground and other terminals

Power switch off

10 kΩ or higher

HINT:

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

*a

Rear view of wire harness connector

(to Battery Voltage Sensor)

*b

Front view of wire harness connector

(to HV Battery Junction Block Assembly (Battery Current Sensor))

(g) Reconnect the y6 battery voltage sensor connector.

(h) Install the No. 1 hybrid battery exhaust duct.

(i) Reconnect the y7 battery current sensor connector.

(j) Install the No. 1 HV battery cover panel RH.

NG

REPLACE HYBRID BATTERY THERMISTOR

OK

4.

CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE)

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

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.

(b) Remove the No. 1 hybrid battery exhaust duct.

Click here

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

(d) Turn the power switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

y6-6 (VIB) - y6-12 (GIB)

Power switch on (IG)

4.6 to 5.4 V

NOTICE:

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.

*a

Component with harness connected

(Battery Voltage Sensor)

(f) Turn the power switch off.

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

(h) Install the No. 1 hybrid battery exhaust duct.

NG

GO TO STEP 9

OK

5.

CHECK BATTERY VOLTAGE SENSOR (GIB - GND)

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

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.

(b) Remove the No. 1 hybrid battery exhaust duct.

Click here

(c) Disconnect the y6 and K17 battery voltage sensor connectors.

NOTICE:

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

y6-12 (GIB) - K17-5 (GND)

Power switch off

Below 1 Ω

*a

Component without harness connected

(Battery Voltage Sensor)

(e) Reconnect the y6 and K17 battery voltage sensor connectors.

(f) Install the No. 1 hybrid battery exhaust duct.

NG

REPLACE BATTERY VOLTAGE SENSOR

OK

6.

CHECK BATTERY VOLTAGE SENSOR (BATTERY CURRENT SENSOR OUTPUT VOLTAGE)

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

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.

(b) Remove the No. 1 hybrid battery exhaust duct.

Click here

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

(d) Turn the power switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

y6-5 (IB0) - y6-12 (GIB)

Power switch on (IG)

2.46 to 2.54 V

NOTICE:

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.

*a

Component with harness connected

(Battery Voltage Sensor)

(f) Turn the power switch off.

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

(h) Install the No. 1 hybrid battery exhaust duct.

Result

Proceed to

OK

A

NG(Voltage is outside the specified value and 0.4 V or more.)

B

NG(Voltage is outside the specified value and less than 0.4 V.)

C
A

REPLACE BATTERY VOLTAGE SENSOR

C

GO TO STEP 8

B

7.

CHECK BATTERY VOLTAGE SENSOR (VIB - IB0)

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

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.

(b) Remove the No. 1 hybrid battery exhaust duct.

Click here

(c) Disconnect the y6 battery voltage sensor connector.

NOTICE:

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

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

Tester Connection

Condition

y6-6 (VIB) - y6-5 (IB0)

Power switch off

*a

Component without harness connected

(Battery Voltage Sensor)

(e) Reconnect the y6 battery voltage sensor connector.

(f) Install the No. 1 hybrid battery exhaust duct.

Result

Proceed to

Below 1 Ω

A

Other than above

B
A

REPLACE BATTERY VOLTAGE SENSOR

B

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

8.

CHECK BATTERY VOLTAGE SENSOR (BATTERY CURRENT SENSOR OUTPUT VOLTAGE)

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

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.

(b) Remove the No. 1 HV battery cover panel RH.

Click here

(c) Disconnect the y7 battery current sensor connector.

NOTICE:

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

(d) Remove the No. 1 hybrid battery exhaust duct.

Click here

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

(f) Turn the power switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

y6-5 (IB0) - y6-12 (GIB)

Power switch on (IG)

4.6 to 5.4 V

NOTICE:

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.

*a

Component with harness connected

(Battery Voltage Sensor)

(h) Turn the power switch off.

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

(j) Install the No. 1 hybrid battery exhaust duct.

(k) Reconnect the y7 battery current sensor connector.

(l) Install the No. 1 HV battery cover panel RH.

OK

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

NG

REPLACE BATTERY VOLTAGE SENSOR

9.

CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE)

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

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.

(b) Remove the No. 1 HV battery cover panel RH.

Click here

(c) Disconnect the y7 battery current sensor connector.

NOTICE:

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

(d) Remove the No. 1 hybrid battery exhaust duct.

Click here

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

(f) Turn the power switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

y6-6 (VIB) - y6-12 (GIB)

Power switch on (IG)

4.6 to 5.4 V

NOTICE:

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.

*a

Component with harness connected

(Battery Voltage Sensor)

(h) Turn the power switch off.

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

(j) Install the No. 1 hybrid battery exhaust duct.

(k) Reconnect the y7 battery current sensor connector.

(l) Install the No. 1 HV battery cover panel RH.

OK

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

NG

REPLACE BATTERY VOLTAGE SENSOR

Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure (P0ABF28)

DESCRIPTION

Refer to the description for DTC P0ABF11.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0ABF28

Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure

The offset value of the battery current sensor is excessively large.

(1 trip detection logic)
  • Battery voltage sensor
  • HV battery junction block assembly
  • Hybrid battery thermistor

Comes on

Master Warning Light:

Comes on
Related Data List

DTC No.

Data List

P0ABF28
  • Hybrid Battery Current for Hybrid Battery Control*1
  • Hybrid Battery Current

HINT:

*1: The value of "Hybrid Battery Current for Hybrid Battery Control" usually changes by 4 A or more while the vehicle is accelerating and decelerating.

MONITOR DESCRIPTION

If the battery voltage sensor detects a malfunction in the battery current sensor, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0AC0 (INF P0ABF28): Current sensor malfunction

Required sensors/components

Battery current sensor

Frequency of operation

Continuous

Duration

TMC's intellectual property

MIL operation

1 driving cycle

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored

TMC's intellectual property

Other conditions belong to TMC's intellectual property

-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

Battery voltage sensor

DTC P0AC0 (INF P0ABF28) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  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 and wait for 2 minutes or more.
  5. Drive the vehicle on urban roads for approximately 10 minutes.[*1]
  6. Turn the power switch off and wait for 2 minutes or more.[*2]
  7. Turn the power switch on (IG) and turn the Techstream on.[*3]
  8. With power switch on (IG) and wait for 10 seconds or more.[*4]

    HINT:

    [*1] to [*4]: Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  9. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  10. Check the DTC judgment result.

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0ABF11.

Click here

CAUTION / NOTICE / HINT

CAUTION:

  • Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
    • Inspecting the high-voltage system
    • Disconnecting the low voltage connector of the inverter with converter assembly
    • Disconnecting the low voltage connector of the HV battery
  • To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
  • After removing the service plug grip from the HV battery, 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

    *a

    Without waiting for 10 minutes

    HINT:

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

NOTICE:

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)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

P0AFC00, P0AFC96 or P0A9563 is not output.

A

P0AFC00, P0AFC96 or P0A9563 is output.

B

(e) Turn the power switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

A

2.

CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - HV BATTERY JUNCTION BLOCK ASSEMBLY)

Click here

NG

REPLACE HYBRID BATTERY THERMISTOR

OK

3.

CHECK HV BATTERY JUNCTION BLOCK ASSEMBLY (BATTERY CURRENT SENSOR (IB))

CAUTION:

Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:

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.

(b) Remove the No. 1 hybrid battery exhaust duct.

Click here

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

(d) Turn the power switch on (IG).

(e) Using a toyota electrical tester set to 40 V, measure the VIB voltage according to the value(s) in the table below.

Tester Connection

Tester Connection

y6-6 (VIB) - y6-12 (GIB)

Power switch on (IG)

NOTICE:

  • 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.
  • Be sure to set the toyota electrical tester to 40 V when performing this test.

*a

Component with harness connected

(Battery Voltage Sensor)

(f) Using a toyota electrical tester set to 4 V, measure the IB0 voltage according to the value(s) in the table below.

Tester Connection

Tester Connection

y6-5 (IB0) - y6-12 (GIB)

Power switch on (IG)

NOTICE:

Be sure to set the toyota electrical tester to 4 V when performing this test.

*a

Component with harness connected

(Battery Voltage Sensor)

(g) Compare the measured values of the IB0 terminal voltage and VIB terminal voltage using the following formula:

IB0 voltage - VIB Voltage / 2 = less than 0.081 V

IB0 voltage - VIB Voltage / 2 = -0.081 V or higher

Result

Proceed to

Within the specified range above

A

Other than above

B

(h) Turn the power switch off.

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

(j) Install the No. 1 hybrid battery exhaust duct.

HINT:

When the power switch is on (IG) the actual current will be approximately 0 A. The following graph shows the relation of the actual output voltage of the battery current sensor terminal IB0 and actual current used for DTC judgment.

B

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

A

4.

REPLACE BATTERY VOLTAGE SENSOR

Click here

NEXT

5.

SIMULATION TEST

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Clear the DTCs and freeze frame data.

Powertrain > Hybrid Control > Clear DTCs

(e) Drive the vehicle on urban roads for approximately 10 minutes.

(f) Turn the power switch off and wait for 2 minutes or more.

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

NEXT

6.

RECONFIRM DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Read output DTCs.

Powertrain > Hybrid Control > Trouble Codes

(e) Turn the power switch off.

Result

Proceed to

P0ABF28 is not output.

A

P0ABF28 is output.

B
A

END
B

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

Hybrid/EV Battery Voltage Isolation Sensor Circuit Internal Electronic Failure (P0AA749). Hybrid/EV Battery Air Temperature Sensor "A" Circuit Short to Ground (P0AAC11,P0AAC15). Hybrid/EV Battery Curr

Hybrid/EV Battery Positive Contactor Circuit Short to Ground (P0AD911). Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open (P0AD915). Hybrid/EV Battery Negative Contactor

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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