Dtc P0116 Engine Coolant Temperature Circuit Range / Performance Problem

Engine. Camry. Acv40 Gsv40
2Az-Fe Engine Control System. Camry. Acv40 Gsv40

DESCRIPTION

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116)

INSPECT THERMOSTAT

DTC P0116 Engine Coolant Temperature Circuit Range / Performance Problem


DESCRIPTION

Refer to DTC P0115 (Link).

DTC No.
DTC Detection Condition
Trouble Area
P0116
Engine coolant temperature is between -40°C and 60°C (-40°F and 140°F) when engine is started, and conditions (a) and (b) are met (2 trip detection logic):
  1. (a) Vehicle is driven at varying speeds (accelerated and decelerated)
  2. (b) Engine coolant temperature remains within 3°C (5.4°F) of initial engine coolant temperature
  1. Thermostat
  2. Engine coolant temperature sensor

INSPECTION PROCEDURE

HINT:
  1. If any of DTCs P0115, P0117 or P0118 are set simultaneously with DTC P0116, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.
  2. 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 help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result:

    Result
    		Proceed to
    DTC P0116 is output
    		A
    DTC P0116 and other DTCs are output
    		B
    HINT:
    If any DTCs other than P0116 are output, troubleshoot those DTCs first.


B
GO TO DTC CHART (CAMRY_ACV40 RM000000PDF0C4X.html)
A


2.INSPECT THERMOSTAT

  1. Remove the thermostat (CAMRY_ACV40 RM0000017WE02QX.html).

  1. Measure the valve opening temperature of the thermostat.

    Standard temperature:
    80°C to 84°C (176°F to 183°F)
    HINT:
    In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.

  1. Reinstall the thermostat (CAMRY_ACV40 RM0000017WB02QX.html).



NG
REPLACE THERMOSTAT (CAMRY_ACV40 RM0000017WE02QX.html)
OK

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (CAMRY_ACV40 RM000002A42028X.html)