Toyota Venza: ECM / PCM Internal Engine Off Timer Performance (P2610)

Toyota Venza Service Manual / 1ar-fe Engine Control / Sfi System / ECM / PCM Internal Engine Off Timer Performance (P2610)

DTC SUMMARY

DTC No.	Monitoring Item	Malfunction Detection Condition	Trouble Area	Detection Timing	Detection Logic
P2610	Soak timer (built into ECM)	An ECM internal malfunction.	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 a DTC the next time the ignition switch is turned ON.

MONITOR STRATEGY

Related DTC	P2610: ECM internal engine off timer performance
Required Sensors/Components	ECM
Frequency of Operation	Once per driving cycle
Duration	2 time: Case 1 -: Case 2 and 3
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

All

Monitor runs whenever following DTC not stored

None

Case 1

All of the following conditions are met	-
Ignition switch	Off
Battery voltage	8 V or higher
CPU clock elapsed time	1.96608 seconds minutes 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

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

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

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.
Turn the ignition switch to ON and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Start the engine and warm it up.
Turn the ignition switch off and wait for at least 15 seconds.
Start the engine.
Stop the engine and leave the vehicle for 60 minutes or more.
Turn the ignition switch to ON and turn the Techstream on.
Enter the following menus: Powertrain / Engine / Trouble Codes.
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.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P2610.

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.

If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (See page ).
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 stored if an internal ECM problem is detected. Diagnostic procedures are not required. ECM replacement is necessary.
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 (See page ).

2.	CHECK WHETHER DTC OUTPUT RECURS (DTC P2610)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Clear the DTCs (See page ).

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

(f) Turn the ignition switch to ON.

(g) Turn the Techstream on.

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

(i) Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.

(j) If no pending DTC is displayed, the repair has been successfully completed.

END

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