DTC Description

DTC DETECTION LOGIC

DTC		M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detection condition
P0116	00	ECT SENSOR (Engine coolant temperature sensor 1 circuit range/performance)	A	Diagnosis condition	Engine cold start
				Signal (terminal)	Engine coolant temperature sensor signal
				Threshold	The comparison result of signals transmitted to ECM from each temperature sensor (IAT sensor, ECT sensor, FTT sensor, and EOT sensor) shows that the voltage signal of the ECT sensor is higher/lower than that of other temperature sensors when the engine is started with its cold state
				Diagnosis delay time	—
			B	Diagnosis condition	—
				Signal (terminal)	Engine coolant temperature sensor signal
				Threshold	Engine coolant temperature signal from engine coolant temperature sensor does not fluctuate, even when some time has passed after starting the engine with pre-warming up condition
				Diagnosis delay time	—

POSSIBLE CAUSE

Harness or connectors (High or low resistance in the engine coolant temperature sensor circuit)
Engine coolant temperature sensor

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

1.INSPECTION START

Is it necessary to erase permanent DTC?

2.PERFORM COMPONENT FUNCTION CHECK

Perform Component Function Check. Refer to Component Function CheckComponent Inspection

Is the inspection result normal?

INSPECTION END

3.PRECONDITIONING

If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following procedure before conducting the next test.

TESTING CONDITION:

Before performing the following procedure, do not add fuel.
Before performing the following procedure, check that fuel level is between 1/4 and 4/4.
Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

4.PERFORM DTC CONFIRMATION PROCEDURE

Move the vehicle to a cool place.
note Cool the vehicle in an environment of ambient air temperature between −10°C (14°F) and 35°C (95°F).
Turn ignition switch OFF and leave the vehicle for 12 hours.
caution Never turn ignition switch ON during this procedure.
note The vehicle must be cooled with the hood open.
Start engine and let it idle for 20 minutes or more.
caution Never turn ignition switch OFF during idling.
Check 1st trip DTC.

Is 1st trip DTC detected?

-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident

-2Confirmation after repair: INSPECTION END