Noise emitting from the generator may be caused
by:
• Worn, loose or defective bearings
• Loose or defective drive pulley
• Incorrect, worn, damaged or misadjusted drive
belt
• Loose mounting bolts
• Misaligned drive pulley
• Defective stator or diode
• Damaged internal fins
BATTERY TEMPERATURE SENSOR—PCM
INPUT
DESCRIPTION
The PCM incorporates a Battery Temperature Sen-
sor (BTS) on its circuit board.
OPERATION
The PCM uses the temperature of the battery area
to control the charge rate. The signal is used to reg-
ulate the system voltage. The system voltage is
higher at cold temperatures and is gradually reduced
as temperature around the battery increases.
The function of the BTS is to enable control of the
generator output based upon ambient temperature.
As temperature increases, the charging rate should
decrease. As temperature decreases, the charging
rate should increase. The sensor functions similar to
the ECT sensor with one major difference, the ambi-
ent sensor does not have a dual temperature range
program. The PCM maintains the maximum output
of the generator by monitoring battery voltage and
controlling battery voltage to a range of 13.5-14.7
volts.
REMOVAL AND INSTALLATION
GENERATOR—2.7L
REMOVAL
(1) Disconnect negative battery cable.
(2) Raise and support vehicle.
(3) Remove lower plastic splash shield.
(4) Remove transmission cooler and reposition
cooler out of the way.
(5) Remove lower radiator crossmember support
and position a jackstand under radiator for support.
(6) Loosen adjusting T-bolt, but do not remove.
(7) Loosen pivot bolt, but do not remove.
(8) Remove the generator drive belt. Refer to the
Cooling System section.
(9) Disconnect the generator field circuit plug.
(10) Remove the B+ terminal nut and wire.
(11) Remove pivot bolt, being careful not to lose
spacer.
(12) Remove generator.
INSTALLATION
(1) Install generator.
(2) Install pivot bolt, leave loose.
(3) Connect the generator field circuit plug.
(4) Install the B+ terminal nut and wire.
(5) Install the generator drive belt. Refer to the
Cooling System section.
(6) Adjusting T-bolt and tighten belt.
(7) Remove jackstand from under radiator and
install lower radiator crossmember support.
(8) Reposition transmission cooler and tighten fas-
teners.
(9) Install lower plastic splash shield.
(10) Lower vehicle.
(11) Connect negative battery cable.
Tighten all fasteners to the proper torque. Refer to
the Torque Specifications chart in this section.
GENERATOR—3.2/3.5L
REMOVAL
(1) Disconnect negative battery cable.
(2) Remove the upper radiator support and relo-
cate.
(3) Loosen lower mounting bolt do not remove.
(4) Loosen pivot bolt, but do not remove.
(5) Loosen belt adjustment bolt.
(6) Remove the generator drive belt. Refer to the
Cooling System section.
(7) Remove bracket.
(8) Remove lower mounting bolt.
(9) Remove pivot bolt.
(10) Remove generator.
(11) Disconnect the generator field circuit plug.
(12) Remove the B+ terminal nut and wire.
INSTALLATION
(1) Connect the B+ wire and tighten nut.
(2) Connect the generator field circuit connector.
(3) Install generator.
(4) Install the pivot bolt.
(5) Install the lower mounting bolt.
(6) Install bracket and tighten bolts.
(7) Install generator drive belt. Refer to the Cool-
ing System section.
(8) Tighten the pivot bolt.
(9) Tighten the lower mounting bolt.
(10) Install the upper radiator support and tighten
the bolts.
(11) Connect the negative battery cable.
Tighten all fasteners to the proper torque. Refer to
the Torque Specifications chart in this section.
8C - 2 CHARGING SYSTEM LH
DESCRIPTION AND OPERATION (Continued)
2000 LH Service Manual
Publication No. 81-270-0040
TSB 26-12-99 December, 1999
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