DTC Description

DESCRIPTION

This ECM contains a timer and measures time between an ignition switch OFF and the next ignition switch ON. This enables the judging of the state of engine cooling at an engine start.

DTC DETECTION LOGIC

DTC		M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detection condition
P2610	00	ECM/PCM INTERNAL ENG OFF TIMER (ECM/PCM engine off timer performance)	Diagnosis condition	—
			Signal (terminal)	—
			Threshold	ECM internal engine off timer is malfunctioning The time calculated by ECM based on a descent allowance of engine coolant temperatures during ignition switch OFF is extremely shorter than the time counted by the Engine internal OFF timer
			Diagnosis delay time	—

POSSIBLE CAUSE

ECM
ECM power supply

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

1.INSPECTION START

It is necessary to erase permanent DTC?

2.PRECONDITIONING

Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 12 V or more under ignition switch OFF condition.

3.PERFORM DTC CONFIRMATION PROCEDURE-I

Turn ignition switch ON and wait at least 190 seconds.
Check 1st trip DTC.

Is 1st trip DTC detected?

DTC Diagnosis Procedure

INSPECTION END

4.PRECONDITIONING

Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 12 V or more under ignition switch OFF condition.
Before performing the following procedure, check that fuel level is between 2/8 and 7/8.

5.PERFORM DTC CONFIRMATION PROCEDURE-I

Turn ignition switch ON and wait at least 190 seconds.
Check 1st trip DTC.

Is 1st trip DTC detected?

DTC Diagnosis Procedure

6.PERFORM DTC CONFIRMATION PROCEDURE-II

caution

To start this self-diagnosis, the conditions listed bellow are required to be satisfied. Perform the following steps to satisfy the conditions.

Engine coolant temperature decrease by 55°C (131°F) or more during the time between an ignition switch OFF (after engine warm-up) and the second ignition switch ON.
A fuel temperature at the second ignition switch ON is −5°C (23°F) or more and less than 35°C (95°F).
The temperature difference between engine coolant and fuel is 5°C (41°F) or more.

note	This self-diagnosis is not performed if the distance traveled is extremely short.

Turn ignition switch ON.
Start engine and warm it up to normal operating temperature.
Turn ignition switch OFF and soak the vehicle for at least 12 hours.
caution
Never turn ON the ignition switch during soaking.
Never open the fuel filler cap and perform refueling during soaking.
Turn ignition switch ON and wait at least 190 seconds.
Check 1st trip DTC.

Is 1st trip DTC detected?

DTC Diagnosis Procedure

INSPECTION END