Dtc P0116 Engine Coolant Temperature Circuit Range / Performance Problem

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
1Az-Fe 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 RM000000PF508IX_01.html).

DTC No.
DTC Detection Condition
Trouble Area
P0116
Case 1:
Engine Coolant Temperature (ECT) between 35°C and 60°C (95°F and 140°F) when engine started, and conditions (a) and (b) met (2 trip detection logic):
  1. (a) Vehicle driven at varying speeds (accelerated and decelerated)
  2. (b) ECT remains within 3°C (5.4°F) of initial ECT
Case 2:
ECT more than 60°C (140°F) when engine started, and conditions (a) and (b) met (6 trip detection logic):
  1. (a) Vehicle driven at varying speeds (accelerated and decelerated)
  2. (b) ECT measurements remain within 1°C (1.8°F) of initial ECT on 6 successive occasions
  1. Thermostat
  1. ECT sensor

INSPECTION PROCEDURE

HINT:
  1. If any of DTCs P0115, P0117 or P0118 are set simultaneously with DTC P0116, the ECT sensor may have an open or a short circuit. Troubleshoot those DTCs first.
  1. Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. 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 on (IG) and turn the tester ON.

  1. Select the following menu items: Powertrain / Engine and ECT / DTC.

  1. Read DTCs.

Result:
Display (DTC Output)
Proceed to
P0116
A
P0116 and other DTCs
B


B
GO TO DTC CHART
A


2.INSPECT THERMOSTAT

  1. Remove the thermostat (RAV4_ACA30 RM0000017WE01DX.html).

  1. Check 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 RM0000017WB01DX.html).



NG
REPLACE THERMOSTAT
OK

REPLACE ENGINE COOLANT TEMPERATURE SENSOR