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DTC Description
 
 
DTC DETECTION LOGIC
DTCM.U.T.-III SE screen terms
(Trouble diagnosis content)
DTC detection condition
P011800ECT SEN/CIRC
(Engine coolant temperature sensor 1 circuit high)
Diagnosis conditionIgnition switch ON
Signal (terminal)Engine coolant temperature sensor signal
ThresholdAn excessively high voltage from the sensor is sent to ECM
Diagnosis delay time—
 
 
POSSIBLE CAUSE
  • Harness or connectors (The engine coolant temperature sensor circuit is open or shorted.)
  • Engine coolant temperature sensor
 
 
FAIL-SAFE
Engine operating condition in fail-safe mode
Fail safe modeVehicle behavior
Combustion control modeIdle speed controlStops feedback control of idle speed and controls with specified speed.
Recovery speed control at deceleratingStops recovery speed control by the fuel cut at decelerating and controls with specified speed.
Idle neutral controlStops idle neutral control.
 
 
DTC Confirmation Procedure
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.
: .
 
2.PERFORM DTC CONFIRMATION PROCEDURE
  1. Turn ignition switch ON and wait at least 5 seconds.
  2. Check DTC.
Is DTC detected?
Proceed to DTC Diagnosis Procedure.
-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident.
-2Confirmation after repair: INSPECTION END