Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001N839
Model Year Start: 2021 Model: Corolla Prod Date Range: [04/2020 - 11/2022]
Title: 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: P2610; ECM / PCM Internal Engine Off Timer Performance; 2021 - 2023 MY Corolla [04/2020 - 11/2022]

DTC

P2610

ECM / PCM Internal Engine Off Timer Performance

DTC SUMMARY

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P2610

ECM / PCM Internal Engine Off Timer Performance

ECM internal malfunction.

ECM

Comes on

DTC stored

DTC for Mexico Models

- Does not apply

DTC No.

Monitoring Item

Detection Timing

Detection Logic

P2610

Soak timer (built into ECM)

Ignition switch off

2 trip

DESCRIPTION

The soak timer operates after the ignition switch is turned off. When a certain amount of time has elapsed after turning the ignition switch off, the soak timer activates the ECM to perform malfunction checks which can only be performed after the engine is stopped. The soak timer is built into the ECM.

MONITOR DESCRIPTION

If the soak timer activates the ECM even though only a short amount of time has elapsed since the ignition switch was turned off, or if the soak timer does not activate the ECM even though a considerable amount of time has elapsed since the ignition switch was turned off, the ECM determines that the soak timer is malfunctioning, illuminates the MIL and stores this DTC the next time the ignition switch is turned to ON.

While the engine is running, the ECM monitors the synchronization of the soak timer and the CPU clock. If these two are not synchronized, the ECM interprets this as a malfunction, illuminates the MIL and sets the DTC.

MONITOR STRATEGY

Related DTC

P2610: ECM internal engine off timer performance

Required Sensors/Components (Main)

ECM

Required Sensors/Components (Related)

-

Frequency of Operation

Once per driving cycle

Duration

2 times: Case 1

-: Case 2 and 3

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

All

Monitor runs whenever the following DTCs are not stored

None

Case 1

All of the following conditions are met

-

Battery voltage

8 V or higher

Ignition switch

Off

CPU clock elapsed time

1.96608 seconds or more

Case 2

All of the following conditions are met

-

Internal engine off timer (elapsed time from engine stop)

10 minutes or more, and less than 30 minutes

Battery voltage

8 V or higher

Ignition switch

ON

Starter

Off

Both of the following conditions are not met at last trip

1 and 2

1. ECM power

On

2. ECM wake up timer by internal engine off timer

Reached

Both of the following conditions are met

3 and 4

3. ECM started by

Ignition switch

4. ECM started by

Internal engine off timer

All of the following conditions are met at last trip

5 to 7

5. ECM internal engine off timer clock comparsion monitor pass

Detected

6. ECM internal engine off timer clock comparsion monitor

Completed

7. Following conditions is met when ECM internal engine off timer clock comparison monitor is completed

-

Internal engine off timer

0 seconds

Case 3

All of the following conditions are met

-

Internal engine off timer (elapsed time from engine stop)

40 minutes or more

Battery voltage

8 V or higher

Ignition switch

ON

Starter

Off

The shortest ECM wake up timer by internal engine off timer

Not reset

Both of the following conditions are not met at last trip

1 and 2

1. ECM power

On

2. ECM wake up timer by internal engine off timer

Reached

Both of the following conditions are met

3 and 4

3. ECM started by

Ignition switch

4. ECM started by

Internal engine off timer

All of the following conditions are met at last trip

5 to 7

5. ECM internal engine off timer clock comparsion monitor pass

Detected

6. ECM internal engine off timer clock comparsion monitor

Completed

7. Following conditions is met when ECM internal engine off timer clock comparison monitor is completed

-

Internal engine off timer

0 seconds

TYPICAL MALFUNCTION THRESHOLDS

Case 1

One of the following conditions is met

Condition A, B or C

A. Both of the following conditions are met

Condition (a) and (b)

(a) CPU clock elapsed time

1.96608 seconds or more, and less than 8.323072 seconds

(b) Internal engine off timer

9.375 seconds or more

B. Both of the following conditions are met

Condition (c) and (d)

(c) CPU clock elapsed time

8.323072 to 10.420224 seconds

(d) Internal engine off timer

18.75 seconds or more

C. Both of the following conditions are met

Condition (e) and (f)

(e) CPU clock elapsed time

More than 10.420224 seconds

(f) Internal engine off timer

Less than 9.375 seconds

Case 2

ECM started by internal engine off timer last trip

Yes

Case 3

ECM started by internal engine off timer last trip

No

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off and wait for at least 30 seconds.
  6. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
  7. Turn the ignition switch off and wait for at least 15 seconds.
  8. Start the engine.
  9. Stop the engine and leave the vehicle for 60 minutes or more.
  10. Turn the ignition switch to ON.
  11. Turn the Techstream on.
  12. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
  13. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  14. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  15. Input the DTC: P2610.
  16. Check the DTC judgment result.

    Techstream Display

    Description

    NORMAL

    • DTC judgment completed
    • System normal

    ABNORMAL

    • DTC judgment completed
    • System abnormal

    INCOMPLETE

    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A

    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
  17. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs.

    Click here 2020 - 2022 MY Corolla [03/2019 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

    HINT:

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTC is output, the system is normal.

CAUTION / NOTICE / HINT

HINT:

  • DTC P2610 is set if an internal ECM problem is detected. Diagnostic procedures are not required. ECM replacement is required.
  • Read Freeze Frame Data using the Techstream. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.

REPLACE ECM

(a) Replace the ECM.

Click here 2020 - 2022 MY Corolla [03/2019 - 09/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: REMOVAL 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: REMOVAL

NEXT

2.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs

(e) Turn the ignition switch off and wait for at least 30 seconds.

NEXT

3.

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

(a) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

(b) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.

(c) Read the Pending DTCs.

Powertrain > Engine and ECT > Trouble Codes

HINT:

If no pending DTC is output, the repair has been successfully completed.

NEXT

END