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DR
CHARGING (Continued)
DESCRIPTION
Generator Lower Pivot Bolt / Nut -
5.9L Gas Engine
Generator Vertical Mounting Bolt -
3.7L / 4.7L Engines
Generator (long) Horizontal
Mounting Bolt - 3.7L / 4.7L Engines
Generator (short) Horizontal
Mounting Bolt - 3.7L / 4.7L Engines
Generator B+ Output Cable
Terminal Nut
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 temper-
ature and control battery charging rate. This temper-
ature data, along with data from monitored line
voltage, is used by the PCM (ECM Diesel) 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 temper-
ature increases, resistance in the sensor decreases
and the detection voltage at the PCM increases.
The BTS is also used for OBD II diagnostics. Cer-
tain 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°F.
REMOVAL
The battery temperature sensor is located under
the vehicle battery and is attached (snapped into) a
mounting hole on battery tray (Fig. 1).
(1) Remove battery. Refer to 8, Battery for proce-
dures.
(2) Pry sensor straight up from battery tray
mounting hole to gain access to electrical connector
(Fig. 1).
(3) Disconnect sensor from engine wire harness
electrical connector.
N·m
41
55
55
74
12
Fig. 1 BATTERY TEMPERATURE SENSOR
1 - BATTERY TEMP. SENSOR
2 - BATTERY
3 - SENSOR ELEC. CONNECT.
4 - BATTERY TRAY
INSTALLATION
The battery temperature sensor is located under
the vehicle battery and is attached (snapped into) a
mounting hole on battery tray.
(1) Pull electrical connector up through mounting
hole in top of battery tray.
(2) Connect sensor.
(3) Snap sensor into battery tray.
(4) Install battery. Refer to 8, Battery for proce-
dures.
CHARGING
Ft. Lbs.
30
40
40
55
-
LOCATION
8F - 21
In. Lbs.
-
-
-
-
108
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