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Discussion Starter #1
What is the purpose of this sensor ?

I moved the outside air temp sensor that is shown on the rear view
mirror to an under hood position to moniter that area .

My underhood temp is about 10* plus ambient .

:D
 
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Discussion Starter #2
Do not disconnect or remove the battery temp sensor, it's needed. I copied the section out of the FSM for you below. The Battery Temp Sensor doesn't do anything more that take the batteries temp. So moving your air temp sensor to under the hood will give you a good sense of how hot it is there.

Ron

BATTERY TEMPERATURE SENSOR DESCRIPTION
The Battery Temperature Sensor (BTS) is attached to the battery tray located under the battery.

OPERATION
The BTS is used to determine the battery temperature and control battery charging rate. This temperature data, along with data from monitored line voltage, is used by the PCM to vary the battery charging rate. System voltage will be higher at colder temperatures and is gradually reduced at warmer temperatures. The PCM sends 5 volts to the sensor and is grounded through the sensor return line. As temperature increases, resistance in the sensor decreases and the detection voltage at the PCM increases. The BTS is also used for OBD II diagnostics. Certain faults and OBD II monitors are either enabled or disabled, depending upon BTS input (for example, disable purge and enable Leak Detection Pump (LDP) and O2 sensor heater tests). Most OBD II monitors are disabled below 20 degrees F.
 
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Thanks for the reply - I have added that to my notes !

:D
 
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