Dtc P0116 Engine Coolant Temperature Circuit Range / Performance Problem

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
2Gr-Fe Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0116)

INSPECT THERMOSTAT

DTC P0116 Engine Coolant Temperature Circuit Range / Performance Problem


DESCRIPTION

A thermistor is built into the Engine Coolant Temperature (ECT) sensor, of which the resistance value varies according to the ECT.
The structure of the sensor and its connection to the ECM are the same as those of the Intake Air Temperature (IAT) sensor.

DTC No.
DTC Detection Condition
Trouble Area
P0116
  1. ECTs as listed below are nearly same (2 trip detection logic):
    1. ECT when engine is started at lower than 60°C (140°F) of ECT
    2. ECT when engine is warmed up
  1. Thermostat
  2. ECT sensor
  1. ECTs as listed below are nearly same when engine is started at higher than 60°C (140°F) of ECT (2 trip detection logic)
    1. ECT when engine is stopped after driving
    2. ECT when engine is started at lower than 60°C (140°F) of ECT

INSPECTION PROCEDURE

HINT:
  1. If any of DTCs P0115, P0117, P0118 and P0125 are set simultaneously with DTC P0116, the ECT 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 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 (RAV4_ACA30 RM000000PDS09FX.html).
1.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0116)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position.

  1. Turn the tester on.

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

  1. Read the DTC.

    Result:

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


B
GO TO DTC CHART (RAV4_ACA30 RM000002DSC00KX.html)
A


2.INSPECT THERMOSTAT

  1. Remove the thermostat (RAV4_ACA30 RM0000025DN006X.html).

  1. 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.

  1. Reinstall the thermostat (RAV4_ACA30 RM0000025DL006X.html).



NG
REPLACE THERMOSTAT (RAV4_ACA30 RM0000025DM006X.html)
OK

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (RAV4_ACA30 RM0000017U800VX.html)