Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026PV7
Model Year Start: 2023 Model: Corolla HV Prod Date Range: [09/2022 -           ]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P06881F; ECM/PCM Power Relay Sense Circuit Intermittent; 2023 - 2025 MY Corolla HV [09/2022 -        ]

DTC

P06881F

ECM/PCM Power Relay Sense Circuit Intermittent

DESCRIPTION

This DTC indicates that the hybrid vehicle control ECU detected an instantaneous interruption in +B power source voltage.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P06881F

ECM/PCM Power Relay Sense Circuit Intermittent

When the ignition switch is ON (READY), the hybrid vehicle control ECU is reset due to an instantaneous interruption of power source.

(1 trip detection logic)
  • Wire harness or connector
  • Hybrid vehicle control ECU

Comes on

Master Warning:

Comes on

SAE Code:

P2511

MONITOR DESCRIPTION

The hybrid vehicle control ECU monitors the +B power source voltage and detects momentary interruptions. If there is a momentary interruption in the +B power source voltage, the hybrid vehicle control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P2511 (INF P06881F): ECM/PCM Power relay sense circuit intermittent

Required sensors/components

Main: Power source circuit

Sub: Hybrid vehicle control ECU

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

Hybrid vehicle control ECU

DTC P2511 (INF P06881F) 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 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): UTILITY

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

    Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): DTC CHECK / CLEAR

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS 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 GTS on.
  6. Turn the ignition switch to ON (READY) and wait for 30 seconds or more. [*1]

    (If the DTC is not output, drive the vehicle on urban roads according to the freeze frame data item "Vehicle Speed" for approximately 5 minutes.)

    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

PROCEDURE

1.

CHECK AUXILIARY BATTERY TERMINAL

(a) Confirm whether the auxiliary battery terminals have been disconnected recently.

Result

Proceed to

Terminals have been disconnected.

A

Terminals have not been disconnected.

B
B

GO TO STEP 5

A

2.

CONFIRM MASTER WARNING

(a) Turn the ignition switch to ON (READY) from off.

(b) Confirm that the master warning illuminates.

Result

Proceed to

Master warning illuminates.

A

Master warning does not illuminate.

B

NOTICE:

DTC P06881F may be stored after disconnecting and reconnecting the auxiliary battery terminals. If this happens, the DTC will not be output if the ignition switch is turned off and then ON (READY) again. In this case, clear the DTCs to complete the inspection.

(c) Turn the ignition switch off.

B

END
A

3.

CLEAR DTC

(a) Read and record the DTCs and Freeze Frame Data.

Powertrain > Hybrid Control > Trouble Codes

(b) Clear the DTCs and Freeze Frame Data.

Powertrain > Hybrid Control > Clear DTCs

(c) Turn the ignition switch off and wait for 2 minutes or more.

NEXT

4.

CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

DTC P06881F is output again.

A

DTCs other than P06881F are also output.

B

(b) Turn the ignition switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)
A

5.

CHECK AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM)

(a) Check the connection of the auxiliary battery terminal.

OK:

The terminal is connected securely and there is no contact problem.

NG

CONNECT SECURELY
OK

6.

CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)

Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): P056014; System Voltage (BATT) Circuit Short to Ground or Open+

NG

CONNECT SECURELY
OK

7.

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGCT-MAIN NO. 1 RELAY)

(a) Remove the IGCT-MAIN NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Disconnect the hybrid vehicle control ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I3-8 (+B1) - 3 (IGCT-MAIN NO. 1 relay holder)

Ignition switch off

Below 1 Ω

(d) Reconnect the hybrid vehicle control ECU connector.

(e) Reinstall the IGCT-MAIN NO. 1 relay.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

8.

CHECK FOR INTERMITTENT PROBLEMS

(a) Check for intermittent problems.

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

(1) Check the connection and terminal contact pressure of the connectors and wire harnesses between the hybrid vehicle control ECU and the No. 1 engine room relay block and No. 1 junction block assembly.

(2) When the ignition switch is ON (READY), jiggle the connectors and wire harnesses between the hybrid vehicle control ECU and the No. 1 engine room relay block and No. 1 junction block assembly.

Result

Proceed to

Problem symptom does not recur.

A

Problem symptom recurs.

B
A

REPLACE HYBRID VEHICLE CONTROL ECU

B

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA