Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001OBCJ
Model Year Start: 2020 Model: RAV4 HV Prod Date Range: [06/2020 -           ]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P056014; System Voltage (BATT) Circuit Short to Ground or Open; 2020 - 2024 MY RAV4 HV [06/2020 -        ]

DTC

P056014

System Voltage (BATT) Circuit Short to Ground or Open

DESCRIPTION

Auxiliary battery power is supplied to the BATT terminal of the hybrid vehicle control ECU assembly in order to store DTCs and freeze frame data. Even if the ignition switch is turned off, back-up power is supplied.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P056014

System Voltage (BATT) Circuit Short to Ground or Open

Malfunction in the hybrid vehicle control ECU assembly back-up power source circuit

(1 trip detection logic)

  • Wire harness or connector
  • Hybrid vehicle control ECU assembly
  • Fuse

Comes on

Master Warning:

Comes on

MONITOR DESCRIPTION

If a period of time has elapsed with a low voltage at the BATT terminal of the hybrid vehicle control ECU assembly, the hybrid vehicle control ECU assembly will determine that a malfunction has occurred in the back-up power supply system, and it will store a DTC. The MIL will illuminate the next time the ignition switch ON.

MONITOR STRATEGY

Related DTCs

P0562 (INF P056014): System voltage range check (Low voltage)

Required sensors/components

Main: Back-up power source circuit

Sub: Hybrid vehicle control ECU assembly

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

Auxiliary battery voltage

Between 9 and 14 V

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 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): UTILITY

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

    Click here 2020 - 2022 MY RAV4 HV [06/2020 - 10/2022]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): DTC CHECK / CLEAR 2023 - 2024 MY RAV4 HV [10/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for 2 minutes or more.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. With ignition switch ON and wait for 5 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, perform the normal judgment procedure again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

After turning the ignition 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 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

PROCEDURE

1.

CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR)

(a) Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU assembly connectors.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: ELECTRONIC CIRCUIT INSPECTION PROCEDURE

OK:

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

NG

CONNECT SECURELY

OK

2.

CHECK HARNESS AND CONNECTOR (POWER SOURCE OF HYBRID VEHICLE CONTROL ECU ASSEMBLY)

(a) Turn the ignition switch off.

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

*a

Component with harness connected

(Hybrid Vehicle Control ECU Assembly)

-

-

Standard Voltage:

Tester Connection

Condition

Specified Condition

A30-27 (BATT) - A30-3 (E1)

Ignition switch off

11 to 14 V

OK

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NG

3.

CHECK FUSE (ECU-B NO. 2)

(a) Remove the ECU-B NO. 2 fuse from the instrument panel junction block assembly.

*1

Instrument Panel Junction Block Assembly

*2

ECU-B NO. 2 Fuse

(b) Check if there is an open circuit in the ECU-B NO. 2 fuse in the instrument panel junction block assembly.

OK:

There is no open circuit in the ECU-B NO. 2 fuse.

(c) Install the ECU-B NO. 2 fuse.

NG

REPLACE FUSE (ECU-B NO. 2)

OK

4.

CHECK HARNESS AND CONNECTOR (ECU-B NO. 2 FUSE - AUXILIARY BATTERY TERMINAL)

(a) Remove the ECU-B NO. 2 fuse from the instrument panel junction block assembly.

*1

Instrument Panel Junction Block Assembly

*2

ECU-B NO. 2 Fuse Terminal

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

(c) Disconnect the cable from the positive (+) auxiliary battery terminal.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (ECU-B NO. 2 fuse terminal) - Auxiliary battery positive (+) cable

Ignition switch off

Below 1 Ω

1 (ECU-B NO. 2 fuse terminal) - Body ground

Ignition switch off

10 kΩ or higher

(e) Connect the cable to the positive (+) auxiliary battery terminal.

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

(g) Install the ECU-B NO. 2 fuse.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK HARNESS AND CONNECTOR (ECU-B NO. 2 FUSE - HYBRID VEHICLE CONTROL ECU ASSEMBLY)

(a) Remove the ECU-B NO. 2 fuse from the instrument panel junction block assembly.

(b) Disconnect the A30 hybrid vehicle control ECU assembly connector.

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

*1

Instrument Panel Junction Block Assembly

*2

ECU-B NO. 2 Fuse Terminal

*a

Front view of wire harness connector

(to Hybrid Vehicle Control ECU Assembly)

-

-

Standard Resistance (Check for Open):

Tester Connection

Condition

Specified Condition

2 (ECU-B NO. 2 fuse terminal) - A30-27 (BATT)

Ignition switch off

Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection

Condition

Specified Condition

2 (ECU-B NO. 2 fuse terminal) or A30-27 (BATT) - Body ground and other terminals

Ignition switch off

10 kΩ or higher

(d) Reconnect the A30 hybrid vehicle control ECU assembly connector.

(e) Reinstall the ECU-B NO. 2 fuse.

OK

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 2020 MY RAV4 HV [10/2019 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2021 MY RAV4 HV [08/2020 - 12/2021]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2022 MY RAV4 HV [12/2021 - 10/2022]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2023 MY RAV4 HV [10/2022 - 10/2023]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL 2024 MY RAV4 HV [10/2023 -        ]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR