Двигатель. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
Система Управления Двигателем 1Ad-Ftv. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116)
DTC P0116 Engine Coolant Temperature Circuit Range / Performance Problem |
DESCRIPTION
A thermistor is built into the engine coolant temperature sensor and it changes its resistance value according to the engine coolant temperature.The structure of the sensor and connection to the ECM is the same as the intake air temperature sensor.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0116 | If the engine coolant temperature was between -40°C (-40°F) and 60°C (140°F) at engine start, and conditions (a) and (b) are met: (2-trip detection logic) (a) Vehicle is driven at varying speeds (accelerating and decelerating) (b) Engine coolant temperature remains within 3°C (5.4°F) of the engine starting temperature | Engine coolant temperature sensor |
| If the engine coolant temperature was more than 60°C (140°F) at engine start, and conditions (a) and (b) are met: (6-trip detection logic) (a) Vehicle is driven at varying speeds (accelerating and decelerating) (b) Engine coolant temperature remains within 1°C (1.8°F) of the engine starting temperature, and this is successively recorded 6 times |
MONITOR DESCRIPTION
The engine coolant temperature sensor is used to monitor the engine coolant temperature. The engine coolant temperature sensor has a thermistor that varies its resistance depending on the temperature of the engine coolant. When the coolant temperature is low, the resistance of the thermistor increases. When the temperature is high, the resistance drops. The variations in resistance are reflected in the voltage output from the sensor. The ECM monitors the sensor voltage and uses this value to calculate the engine coolant temperature. When the sensor's voltage output varies slightly, the ECM interprets this as a fault in the engine coolant temperature sensor and sets a DTC.Examples:
- Upon starting the engine, the engine coolant temperature was between -40°C (-40°F) and 60°C (140°F). If after driving for a few minutes, the engine coolant temperature still remains within 3°C (5.4°F) of the staring temperature, a DTC will be set (2 trip detection logic).
- Upon starting the engine, the engine coolant temperature was over 90°C (194°F). If after driving for a few minutes, the engine coolant temperature still remains within 1°C (1.8°F) of the starting temperature, a DTC will be set (6 trip detection logic).
INSPECTION PROCEDURE
- УКАЗАНИЕ:
- If DTCs P0115, P0117, and P0118 are output simultaneously, the engine coolant temperature sensor circuit may be open or shorted. Perform troubleshooting for these DTCs first.
- 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, and other data from the time the malfunction occurred.
| 1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch on (IG) and turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / DTC.
Read the DTCs.
- Result:
Result Proceed to DTC P0116 is output A DTC P0116 and other DTCs are output B
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| A | |
| 2.INSPECT THERMOSTAT |
Remove the thermostat (See page Нажмите здесь).
Check the valve operating temperature of the thermostat.
- Standard value:
- 80°C to 84°C (176°F to 183°F)
- УКАЗАНИЕ:
- In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.
Reinstall the thermostat (See page Нажмите здесь).
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| OK | ||
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