Inspection Procedure

HINT:

• If DTC P0115, P0116, P0117, P0118 and P0125 are output simultaneously, The ECT sensor circuit may be open or shorted. Perform the troubleshooting of DTC P0115, P0117 or P0118 first.
• Read freeze frame data using the intelligent tester. 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.

1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0116) 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the ignition switch to the ON position and turn the tester on.
   3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   4. Read the DTCs.

      Result 

      DTC RESULT REFERENCE
      
      

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

   B: GO TO  DTC CHART  

   A: GO TO NEXT STEP 

2. INSPECT THERMOSTAT 
   1. Remove the thermostat (See REMOVAL ).
   2. Check the valve opening temperature of the thermostat.

      Standard temperature: 

      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 thermostat (See REMOVAL ).

   NG: REPLACE THERMOSTAT 

   OK: REPLACE ENGINE COOLANT TEMPERATURE SENSOR