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Home >> Lexus >> 2006 >> LX 470 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2UZ-FE) - DTC P0010 - P0308 >> DTC P0116: Engine Coolant Temperature Circuit Range / Performance Problems >> Inspection Procedure
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Inspection Procedure

  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0116) 
    1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
    2. Turn the ignition switch ON.
    3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
    4. Read the DTCs.

    Result 

    RESULT CHART

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

    B: GO TO RELEVANT DTC CHART 

    A: Go to next step 

  2. INSPECT THERMOSTAT 
    1. Remove the thermostat (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 thermostat (INSTALLATION ).

    NG: REPLACE THERMOSTAT 

    OK: REPLACE ENGINE COOLANT TEMPERATURE SENSOR