Quote:
quote:Originally posted by Dalite
The battery temperature sensor that is located under the battery tray
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Don't mean to but in... but.....
I've seen posts about the battery temp sensor under the tray. I don't know where that came from.
Here's page 8F-23 of the 2002 manual:
BATTERY TEMPERATURE
SENSOR
DESCRIPTION
The IAT sensor attaches to the intake air duct
(Fig. 1).
The IAT Sensor is a Negative Temperature Coefficient
(NTC) Sensor that provides information to the
PCM regarding the temperature of the air entering
the intake manifold. The PCM sends 5 volts to the
sensor and is grounded through the sensor return
line. As temperature increases, resistance in the sensor
decreases.
OPERATION
Inlet/Intake Air Temperature
The inlet air temperature sensor replaces the
intake air temperature sensor and the battery temperature
sensor. The PCM uses the information from
the inlet air temperature sensor along with other
stored parameters to determine values to use as an
intake air temperature and a battery temperature.
The IAT sensor value is used by the PCM to determine
air density.
The PCM uses this information to calculate:
² Injector pulse width
² Adjustment of ignition timing (to prevent spark
knock at high intake air temperatures)
Battery Temperature
The battery temperature information along with
data from monitored line voltage (B+), 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 battery temperature information is also used
for OBD II diagnostics. Certain faults and OBD II
monitors are either enabled or disabled depending
upon the battery temperature sensor input (example:
disable purge, enable LDP). Most OBD II monitors
are disabled below 20°F.