Dtc P0116 Engine Coolant Temperature Circuit Range / Performance Problem

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
3Zr-Fae Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

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 (RAV4_ACA30 RM000000PF50OTX_01.html).

DTC No.
DTC Detection Condition
Trouble Area
P0116
When either of the following conditions is met
(2 trip detection logic):
  1. When cold engine started and engine warmed up, engine coolant temperature sensor value does not change
  2. After warmed up engine stopped and then next cold engine start performed, engine coolant temperature sensor value does not change
  1. Thermostat
  2. Engine coolant temperature sensor
The engine coolant temperature is between -40 and 60°C (-40 and 140°F) when the engine is started, and conditions (a) and (b) are met (2 trip detection logic):
  1. (a) The vehicle is driven at varying speeds (accelerated and decelerated).
  2. (b) The engine coolant temperature remains within 3°C (5.4°F) of the initial engine coolant temperature.

INSPECTION PROCEDURE

HINT:
  1. If DTC P0115, P0117 or P0118 is output simultaneously with DTC P0116, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.
  1. 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 and 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 (RAV4_ACA30 RM000000PDF0FMX.html)
A


2.INSPECT THERMOSTAT

  1. Remove the thermostat (RAV4_ACA30 RM000000RTF031X.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 (RAV4_ACA30 RM000000RTC031X.html).



NG
REPLACE THERMOSTAT (RAV4_ACA30 RM000000RTF031X.html)
OK

REPLACE ENGINE COOLANT TEMPERATURE SENSOR (RAV4_ACA30 RM000002WSG02VX.html)