Inspection Procedure

HINT:

• If any of DTCs P0115, P0117, P0118 or P0125 are set simultaneously with DTC P0116, the ECT sensor may have an open or a short circuit. Troubleshoot those DTCs first.
• 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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See FREEZE FRAME DATA ).

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116) 
   1. Connect the Techstream to the DLC3.
   2. Turn the engine switch on (IG).
   3. Turn the Techstream on.
   4. Select the following menu items: Powertrain/Engine and ECT/Trouble Codes.
   5. Read the DTC.

      Result 

      DTC OUTPUT REFERENCE
      
      

      Display (DTC Output)	Proceed to
      P0116	A
      P0116 and other DTCs	B

   B : GO TO DTC CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

   A : Go to next step 

2. INSPECT WATER INLET WITH THERMOSTAT (THERMOSTAT) 
   1. Remove the water inlet with thermostat (See REMOVAL ).
   2. Check the valve opening temperature of the thermostat.

      Standard: 

      80 to 84°C (176 to 183°F) 

      HINT:

      In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.

   3. Reinstall the water inlet with thermostat (See INSTALLATION ).

   NG : REPLACE WATER INLET WITH THERMOSTAT 

   OK : REPLACE ENGINE COOLANT TEMPERATURE SENSOR