Dtc P2610 Ecm / Pcm Internal Engine Off Timer Performance

Engine Hybrid System. Yaris. Ncp93, 131
1Nz-Fe Engine Control. Yaris. Ncp93, 131

DTC SUMMARY

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

CONFIRMATION DRIVING PATTERN

INSPECTION PROCEDURE

REPLACE ECM

CHECK WHETHER DTC OUTPUT RECURS (IN ADDITION TO DTC P2610)

DTC P2610 ECM / PCM Internal Engine Off Timer Performance


DTC SUMMARY


DTC No.
Monitoring Item
Malfunction Detection Condition
Trouble Area
Detection Timing
Detection Logic
P2610
Soak timer (built into ECM)
ECM internal malfunction
ECM
Engine running
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.

Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan). Dtc P2610 Ecm / Pcm Internal Engine Off Timer Performance


MONITOR DESCRIPTION

  1. 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 stores the DTC.
  2. 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 a DTC the next time the ignition switch is turned ON.

MONITOR STRATEGY


Required Sensors/Components
ECM
Frequency of Operation
Once per driving cycle
Duration
10 minutes: Timer malfunction
Within 9.5 hours: Timer start-up malfunction
MIL Operation
2 driving cycles
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


All
Monitor runs whenever following DTCs not present
None

Timer Malfunction
Ignition switch
ON
Engine
Running
Battery voltage
8 V or more
Starter
OFF
CPU clock elapsed time
10 minutes or more

Timer Start-up Malfunction (Case 1)
Internal engine off timer (elapsed time from engine stop)
Less than 1800 seconds
Battery voltage
8 V or more
Ignition switch
ON
Starter
OFF

Timer Start-up Malfunction (Case 2)
Internal engine off timer (elapsed time from engine stop)
2400 seconds or more
Battery voltage
8 V or more
Ignition switch
ON
Starter
OFF

TYPICAL MALFUNCTION THRESHOLDS


Timer Malfunction
Internal engine off timer (elapsed time from engine stop)
Less than 7 minutes, or more than 13 minutes

Timer Start-up Malfunction (Case 1)
ECM had the started record by internal engine off timer
Yes

Timer Start-up Malfunction (Case 2)
ECM had the started record by internal engine off timer
No

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. Start the engine.
  7. Idle the engine for 10 minutes or more.
  8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
  9. Read pending DTCs.
    HINT:
    1. If a pending DTC is output, the system is malfunctioning.
    2. If a pending DTC is not output, perform the following procedure.
  10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  11. Input the DTC: P2610.
  12. Check the DTC judgment result.

    Techstream Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    HINT:
    If the judgment result shows ABNORMAL, the system has a malfunction.
  13. If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (YARIS_NCP93 RM000000PDK0T5X.html).
    HINT:
    1. If a permanent DTC is output, the system is malfunctioning.
    2. If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
  1. DTC P2610 is stored if an internal ECM problem is detected. Diagnostic procedures are not required. ECM replacement is required.
  2. 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.
1.REPLACE ECM

  1. Replace the ECM (YARIS_NCP93 RM000001CN002IX.html).


NEXT


2.CHECK WHETHER DTC OUTPUT RECURS (IN ADDITION TO DTC P2610)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Clear the DTCs (YARIS_NCP93 RM000000PDK0T5X.html).

  1. Turn the ignition switch off and wait for at least 30 seconds.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Start the engine and wait for 10 minutes or more.

  1. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

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

NEXT

END