Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Hybrid/EV Battery Sensor Module Signal Compare Failure (P0AFC62,...,P308A13)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / Hybrid / Battery Control / Hybrid Control System / Hybrid/EV Battery Sensor Module Signal Compare Failure (P0AFC62,...,P308A13)

DESCRIPTION

Refer to the description for DTC P1AC000.

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DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0AFC62

Hybrid/EV Battery Sensor Module Signal Compare Failure

The difference between the voltage output by detection circuit C and the total of the voltage output by detection circuits A and B exceeds a threshold.

HINT: The battery voltage sensor uses 3 voltage detection circuits (A, B and C) to detect the voltage of the battery blocks.

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B3B14

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

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B4014

Hybrid/EV Battery Voltage Sensor "B" Circuit Short to Ground or Open

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B4514

Hybrid/EV Battery Voltage Sensor "C" Circuit Short to Ground or Open

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B4A14

Hybrid/EV Battery Voltage Sensor "D" Circuit Short to Ground or Open

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B4F14

Hybrid/EV Battery Voltage Sensor "E" Circuit Short to Ground or Open

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B5414

Hybrid/EV Battery Voltage Sensor "F" Circuit Short to Ground or Open

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B5914

Hybrid/EV Battery Voltage Sensor "G" Circuit Short to Ground or Open

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B5E14

Hybrid/EV Battery Voltage Sensor "H" Circuit Short to Ground or Open

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B6314

Hybrid/EV Battery Voltage Sensor "I" Circuit Short to Ground or Open

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B6814

Hybrid/EV Battery Voltage Sensor "J" Circuit Short to Ground or Open

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B6D14

Hybrid/EV Battery Voltage Sensor "K" Circuit Short to Ground or Open

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P0B7214

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

The battery block voltage detection line has a malfunction and any of the battery block voltages become lower than the specified value (open).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

P308A13

Hybrid/EV Battery Voltage Sensor All Circuit Open

The battery block voltage detection line is open (all blocks) or all battery block voltages become lower than the specified value (possibility of open or loosely connected connector).

(1 trip detection logic)

  • Battery voltage sensor
  • HV battery

Comes on

Master Warning Light:

Comes on

HINT:

Hybrid Battery Block 1 to 11 Voltage values smaller than 2.0 V may not be shown in the Data List because a fail-safe value is substituted.

Related Data List

DTC No.

Data List

P0AFC62

Hybrid Battery Block 1 to 11 Voltage*1

P0B3B14

P0B4014

P0B4514

P0B4A14

P0B4F14

P0B5414

P0B5914

P0B5E14

P0B6314

P0B6814

P0B6D14

P0B7214

P308A13

  • Hybrid Battery Voltage
  • Hybrid Battery Block 1 to 11 Voltage*1

HINT:

  • *1: Under normal conditions, the values of Hybrid Battery Block 1, 2, 9, 10 and 11 Voltage will be approximately 16 V and Hybrid Battery Block 3, 4, 5, 6, 7 and 8 Voltage will be approximately 32 V.
  • If there is a short or open in a battery block voltage detection line, the value of Hybrid Battery Block Voltage for the corresponding battery block will be lower than 8 V.

MONITOR DESCRIPTION

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

MONITOR STRATEGY

Related DTCs

P0AFC (INF P0AFC62), P0B3D (INF P0B3B14), P0B42 (INF P0B4014), P0B47 (INF P0B4514), P0B4C (INF P0B4A14), P0B51 (INF P0B4F14), P0B56 (INF P0B5414), P0B5B (INF P0B5914), P0B60 (INF P0B5E14), P0B65 (INF P0B6314), P0B6A (INF P0B6814), P0B6F (INF P0B6D14), P0B74 (INF P0B7214), P308A (INF P308A13): Battery voltage sensor circuit malfunction (open)

Required sensors/components

Battery voltage 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 P0AFC (INF P0AFC62) is not detected

DTC P0B3D (INF P0B3B14) is not detected

DTC P0B42 (INF P0B4014) is not detected

DTC P0B47 (INF P0B4514) is not detected

DTC P0B4C (INF P0B4A14) is not detected

DTC P0B51 (INF P0B4F14) is not detected

DTC P0B56 (INF P0B5414) is not detected

DTC P0B5B (INF P0B5914) is not detected

DTC P0B60 (INF P0B5E14) is not detected

DTC P0B65 (INF P0B6314) is not detected

DTC P0B6A (INF P0B6814) is not detected

DTC P0B65 (INF P0B6D14) is not detected

DTC P0B6A (INF P0B7214) is not detected

DTC P308A (INF P308A13) 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 20 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.

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

  • Make sure to insulate the high-voltage connectors and terminals of the HV battery with insulating tape after removing it.

    If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.

  • When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

    *a

    Dealer

    *b

    Battery Collection Agent

    • Accidents such as electric shock may result if the HV battery is disposed of improperly or abandoned. Therefore, make sure to return all HV batteries through an authorized collection agent.
  • After removing the HV battery, keep it away from water. Exposure to water may cause the HV battery to produce heat, resulting in a fire.

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 and record any HV system DTCs and freeze frame data.

(e) Read output DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

P0AFC00, P0AFC96 or P308A12 is not output.

A

P0AFC00, P0AFC96 or P308A12 is output.

B

(f) Turn the power switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

A

2.

CHECK CONNECTOR CONNECTION CONDITION

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) Check the connections of the y6 battery voltage sensor connector.

Click here

OK:

The connector is connected securely and there are no contact problems.

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

NG

CONNECT SECURELY

OK

3.

REPLACE BATTERY VOLTAGE SENSOR

Click here

NEXT

4.

CLEAR DTC (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Powertrain / Hybrid Control / Clear DTCs.

(d) Clear the DTCs and freeze frame data.

Powertrain > Hybrid Control > Clear DTCs

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

(f) Turn the power switch on (IG) and wait for 20 seconds or more.

NEXT

5.

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

Result

Proceed to

Hybrid battery voltage sensor circuit DTCs for this diagnostic procedure are not output.

A

Hybrid battery voltage sensor circuit DTCs for this diagnostic procedure are output.

B

(e) Turn the power switch off.

A

END

B

REPLACE HV BATTERY

    Hybrid/EV Battery Sensor Module Internal Electronic Failure (P0AFC49)

    Hybrid/EV Battery "A" Voltage Sensor Voltage Out of Range (P0B231C)

    See More:

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