Connect ohmmeter between term. 13 on disconnected DME plug and ground. Specifications for 15 to 30°C (59 to 86°F): 1.45 to 3.3 k-ohms Specifications for 80°C (176°F): 280 to 360 ohms If measured values deviate from specified values, repeat test on temperature sensor itself, replacing temperature sensor if necessary. Note: Break on temperature sensor causes richer mixture. Short on temperature sensor causes leaner mixture.
Other way is :-
To test the sensor, connect a digital meter to the sensor leads and hold the ice cube against the sensor. Because the sensor has a negative temperature coefficient (higher resistance at colder temperatures), you should see the meter reading increase as the sensor cools. Remove the ice and the meter reading should decrease.
If the sensor is not operating properly the DME cannot compensate for air density changes due to changes in ambient temperature. This will cause the fuel/air mixture to be off.
Answers & Comments
Hi,
Connect ohmmeter between term. 13 on disconnected DME plug and ground. Specifications for 15 to 30°C (59 to 86°F): 1.45 to 3.3 k-ohms Specifications for 80°C (176°F): 280 to 360 ohms If measured values deviate from specified values, repeat test on temperature sensor itself, replacing temperature sensor if necessary.
Note: Break on temperature sensor causes richer mixture. Short on temperature sensor causes leaner mixture.
Other way is :-
To test the sensor, connect a digital meter to the sensor leads and hold the ice cube against the sensor. Because the sensor has a negative temperature coefficient (higher resistance at colder temperatures), you should see the meter reading increase as the sensor cools. Remove the ice and the meter reading should decrease.
If the sensor is not operating properly the DME cannot compensate for air density changes due to changes in ambient temperature. This will cause the fuel/air mixture to be off.
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