Drive belt CHRYSLER VOYAGER 2001 Service Manual

CONDITION POSSIBLE CAUSES CORRECTION
8. Internal power steering gear
noise.8. Replace power steering gear.
9. Damaged front suspension
crossmember.9. Replace front suspension
crossmember.
10. Stabilizer bar link ball joints
worn.10. Replace stabilizer bar link.
POPPING NOISE 1. Worn outer tie rod. 1. Replace outer tie rod.
CHIRP OR SQUEAL
(POWER STEERING
PUMP)1. Loose power steering pump drive
belt.1. Check and adjust power steering
pump drive belt to specifications or
replace automatic tensioner where
applicable. Replace belt if worn or
glazed.
WHINE, GROWL, MOAN
OR GROAN (POWER
STEERING PUMP)**1. Low fluid level. 1. Fill power steering fluid reservoir to
proper level and check for leaks (make
sure all air is bled from the system
fluid).
2. Power steering hose touching
vehicle body or frame.2. Adjust hose to proper position by
loosening, repositioning, and tightening
fitting to specified torque. Do not bend
tubing. Replace hose if damaged.
3. Extreme wear of power steering
pump internal components.3. Replace power steering pump and
flush system as necessary.
SUCKING AIR SOUND 1. Loose clamp on power steering
fluid return hose.1. Tighten or replace hose clamp.
2. Missing O-Ring on power steering
hose connection.2. Inspect connection and replace
O-Ring as required.
3. Low power steering fluid level. 3. Fill power steering fluid reservoir to
proper level and check for leaks.
4. Air leak between power steering
fluid reservoir and power steering
pump.4. Replace power steering pump (with
reservoir).
SQUEAK OR RUBBING
SOUND1. Steering column shroud rubbing. 1. Realign shrouds as necessary.
2. Steering column shaft rubbing. 2. Move or realign item rubbing shaft.
3. Clockspring noisy. 3. Remove clockspring. Reinstall wheel.
If noise is gone, replace clockspring.
4. Steering gear internally noisy. 4. Replace steering gear.
SCRUBBING OR
KNOCKING NOISE.1. Incorrect tire or wheel size. 1. Replace incorrect size tire or wheel
with size used as original equipment.
2. Interference between steering
gear and other vehicle components.2. Check for bent or misaligned
components and correct as necessary.
3. Steering gear internal stops worn
excessively allowing tires to be
steered excessively far.3. Replace steering gear.
19 - 4 STEERINGRS
STEERING (Continued)

CONDITION POSSIBLE CAUSES CORRECTION
5. Lack of lubrication in steering gear
outer tie rod ends.5. Lubricate tie rod ends if they are not a
lubricated-for-life type. If tie rod end is a
lubricated-for-life type, replace tie rod end.
6. Loose power steering pump drive
belt.6. Tighten the power steering pump drive
belt to specifications or replace automatic
tensioner where applicable. If drive belt is
worn or glazed, replace belt.
7. Faulty power steering pump flow
control (Follow Power Steering
System Flow and Pressure Test
procedure).7. Replace power steering pump.
8. Excessive friction in steering
column or intermediate shaft/coupler.8. Isolate and correct condition.
9. Excessive friction in power
steering gear.9. Replace power steering gear.
10. Worn or binding seat and bearing
in front strut assembly.10. Replace seat and bearing in front strut
assembly.
STIFF, HARD TO TURN,
SURGE, MOMENTARY
INCREASE IN EFFORT
WHEN TURNING.1. Tires not properly inflated. 1. Inflate tires to specified pressure.
2. Low power steering fluid level. 2. Add power steering fluid as required to
power steering fluid reservoir to obtain
proper level. Check for leaks.
3. Loose power steering pump drive
belt.3. Tighten the power steering pump drive
belt to specifications or replace automatic
tensioner where applicable. If drive belt is
worn or glazed, replace belt.
4. Lack of lubrication in lower control
arm ball joints.4. Lubricate ball joints if ball joints are not a
lubricated-for-life type ball joint. If ball joint
is a lubricated-for-life ball joint, replace
lower control arm ball joint.
5. Worn or binding lower control arm
ball joint.5. Replace lower control arm ball joint.
6. Low power steering pump
pressure (Follow Power Steering
System Flow and Pressure Test
procedure).6. Replace the power steering pump as
necessary.
7. High internal leak in power
steering gear (Follow Power Steering
System Flow and Pressure Test
procedure).7. Replace power steering gear.
STEERING WHEEL DOES
NOT RETURN TO
CENTER POSITION.1. Tires not inflated properly. 1. Inflate tires to specified pressure.
2. Improper front wheel alignment. 2. Check and adjust wheel alignment as
necessary.
19 - 6 STEERINGRS
STEERING (Continued)

PUMP
TABLE OF CONTENTS
page page
PUMP
DESCRIPTION...........................24
OPERATION.............................24
CAUTION...............................25
STANDARD PROCEDURE..................25
POWER STEERING PUMP INITIAL
OPERATION...........................25
REMOVAL..............................25
DISASSEMBLY...........................28
ASSEMBLY.............................28
INSTALLATION...........................29SPECIAL TOOLS.........................30
FLUID
STANDARD PROCEDURE..................30
POWER STEERING FLUID LEVEL
CHECKING............................30
FLUID COOLER
DESCRIPTION...........................30
OPERATION.............................30
REMOVAL..............................31
INSTALLATION...........................31
PUMP
DESCRIPTION
Hydraulic pressure for the operation of the power
steering gear is provided by a belt driven power
steering pump. The power steering pump is mounted
on the back side of the engine on all engine applica-
tions. The pumps are different depending on the
engine option. The pump for the 2.4L engine is made
out of cast iron and steel. The pump used on the
3.3L/3.8L engine is made of aluminum.
The pump for the 3.3L/3.8L engine does not have a
return fitting as the pump for the 2.4L engine does.
The power steering return hose on the 3.3L/3.8L
engine goes to the reservoir instead of the pump.
OPERATION
The power steering pump is a constant flow rate
and displacement vane type pump. The power steer-
ing pump used on all applications is the Vane-Sub-
merged remote reservoir style power steering pump.
The remote reservoir type pump has the pump
housing and internal components combined with the
fluid housing. It has a remote reservoir for the power
steering fluid supply.Fig. 1 POWER STEERING PUMP (2.4L)
1 - PULLEY
2 - BRACKET
3 - PRESSURE FITTING
4 - RETURN FITTING
5 - SUPPLY FITTING
Fig. 2 POWER STEERING PUMP (3.3L/3.8L)
1 - SUPPLY FITTING
2 - PRESSURE FITTING
3 - PULLEY
19 - 24 PUMPRS

(10) Move the heat sleeve on the power steering
return hose to expose the hose connection at the
pump (Fig. 5). Remove the hose from the power
steering Pump. Allow the remaining power steering
fluid to drain from the power steering pump and res-
ervoir through the removed return hose.
(11) Remove the power steering fluid pressure line
from the power steering pump (Fig. 6). Drain excess
power steering fluid from tube.
(12) Remove the fasteners, then the accessory
drive splash shield.
(13) Remove the adjuster nut attaching rear of
power steering pump to the cast mounting bracket.
(Fig. 7)
(14) Remove the front adjuster nut and the lower
pivot bolt (Fig. 8) attaching power steering pump
bracket to cast bracket.
(15) Remove the drive belt from the power steering
pump pulley.
(16) Remove the power steering pump and the
front bracket from the cast bracket on the engine as
an assembly through the exhaust tunnel.
(17) Remove the 3 bolts attaching the front
bracket to the power steering pump and separate the
power steering pump from the front bracket.
(18) If transferal of the power steering pump pul-
ley is necessary, (Refer to 19 - STEERING/PUMP -
DISASSEMBLY).
REMOVAL - PUMP (3.3L/3.8L ENGINE)
(1) Remove the (-) negative battery cable from the
battery and isolate cable.
(2) Remove the wiper module (unit)(Refer to 8 -
ELECTRICAL/WIPERS/WASHERS/WIPER MOD-
ULE - REMOVAL).(3) Raise the vehicle.
(4) Remove the drive belt splash shield.
Fig. 4 Exhaust System - Typical (All Vehicles)
1 - CATALYTIC CONVERTER 4 - SUPPORT - RESONATOR
2 - BAND CLAMP 5 - RESONATOR
3 - SUPPORTS - MUFFLER 6 - MUFFLER
Fig. 5 PRESSURE AND RETURN HOSES - 2.4L
1 - PUMP
2 - RETURN HOSE
3 - ROUTING CLAMPS
4 - PRESSURE FITTING AT GEAR
5 - RETURN FITTING AT GEAR
6 - CRADLE CROSSMEMBER
7 - STEERING GEAR
8 - PRESSURE FITTING AT PUMP
19 - 26 PUMPRS
PUMP (Continued)

DISASSEMBLY - PUMP (PULLEY)
The only serviceable part of the power steering
pump is the pulley. The procedure following is for
removal and installation of the pulley from the pump
once the pump is removed from the vehicle.(1) Remove the power steering pump from the
vehicle. Refer to Removal And Installation in this
section of the service manual.
(2) Remove the pulley from the shaft of the power
steering pump using Puller C-4333 or C-4068 (Fig.
12).
CAUTION: Do not hammer on power steering pump
pulley. This will damage the pulley and the power
steering pump.
(3) Replace pulley if it is found to be bent, cracked,
or loose.
ASSEMBLY - PUMP (PULLEY)
The only serviceable part of the power steering
pump is the pulley. The procedure following is for
removal and installation of the pulley from the pump
once the pump is removed from the vehicle.
(1) Install the pulley with Installer C-4063 (Fig.
13). Do not use the tool adapters.
(2) Ensure that the tool and the pulley remain
aligned with the pump shaft. Prevent the pulley from
being cocked on the shaft.
(3) Install the pulley until it is flush with the end
of the power steering pump shaft (Fig. 14).
(4) Install the power steering pump on the vehicle.
NOTE: Once the pump is installed on the vehicle,
run the engine until it's warm (5 min.) and note any
belt chirp. If chirp exists, move the pulley outward
approximately 0.5 mm (0.020 in.). If noise increases,
press the pulley on 1.0 mm (0.040 in.). Be careful
that the pulley does not contact the pump mounting
bolts.
Fig. 10 PRESSURE HOSE ROUTING CLAMP
1 - PRESSURE HOSE TUBE
2 - STEERING GEAR
3 - CRADLE CROSSMEMBER
4 - DRIVESHAFT
5 - ROUTING CLAMP BRACKET
Fig. 11 SUPPLY & PRESSURE HOSES AT PUMP
1 - PRESSURE HOSE AND FITTING
2 - SUPPLY HOSE AND CLAMP
3 - POWER STEERING PUMP
Fig. 12 Pulley Removal
1 - POWER STEERING PUMP DRIVE PULLEY
2 - SPECIAL TOOL C-4333
19 - 28 PUMPRS
PUMP (Continued)

INSTALLATION - PUMP (2.4L ENGINE)
(1) Install power steering pump back in vehicle
using the reverse order of its removal through the
exhaust tunnel are of the vehicle.
(2) Install the power steering pump on its cast
mounting bracket (Fig. 7), then install the nut and
bolt attaching the front bracket to the cast bracket
(Fig. 8).Do not fully tighten at this time..
(3) Install the rear nut (Fig. 7).
(4) Install the power steering pump drive belt on
pulley and adjust (Refer to 7 - COOLING/ACCES-
SORY DRIVE/DRIVE BELTS - INSTALLATION).(5) Tighten the two adjustment slot bolts and the
one pivot bolt to 54 N´m (40 ft.lbs.) torque.
(6) Install the accessory drive splash shield.
NOTE: Before installing power steering fluid pres-
sure hose on power steering pump, inspect the
O-ring on the pressure hose for damage and
replace if necessary.
(7) Install the power steering fluid pressure line
onto the output fitting of the power steering pump
(Fig. 6). Tighten the pressure line to pump fitting
tube nut to a torque of 31 N´m (275 in. lbs.).
(8) Install the power steering fluid low pressure
return hose on the power steering pump low pressure
fitting (Fig. 6).Be sure hose clamps are properly
reinstalled.
(9) Install the power steering fluid supply hose on
the power steering pump fluid fitting.Be sure hose
is clear of accessory drive belts all hose clamps
are properly reinstalled.
(10) When used, properly position the protective
heat sleeve on the power steering return hose. Tie
strap the heat sleeve to the power steering hose to
keep in it's proper position.
(11) Install the exhaust system (Fig. 4). Install all
exhaust system isolators/hangers on the exhaust sys-
tem brackets, then the four bolts and flag nuts (Fig.
3).
(12) Connect the oxygen sensor wiring harness to
the vehicle wiring harness.
(13) Lower vehicle.
(14) Connect the negative battery cable on the
negative battery post.
(15) Perform the POWER STEERING PUMP INI-
TIAL OPERATION procedure to properly fill and
bleed the power steering system. (Refer to 19 -
STEERING/PUMP - STANDARD PROCEDURE)
(16) Inspect for leaks.
INSTALLATION - PUMP (3.3L/3.8L ENGINE)
(1) Install power steering pump back in vehicle
using the reverse order of its removal through the
engine compartment of the vehicle.
(2) Install the power steering pump on its mount-
ing bracket.
(3) Install the 3 front and 1 rear power steering
pump mounting bolts (Fig. 9). Remember to place
spacer between pump and rear mounting bracket
when installing rear mounting bolt. Tighten the
power steering pump mounting bolts to a torque of
54 N´m (40 ft. lbs.).
NOTE: Before installing power steering pressure
hose on power steering pump, inspect the O-ring
on the power steering pressure hose for damage
and replace if required.
Fig. 13 Pulley Installation
1 - POWER STEERING PUMP DRIVE PULLEY
2 - SPECIAL TOOL
C-4063±A
Fig. 14 Pulley To Pump Shaft Location
1 - PULLEY
2 - PUMP BODY
3 - PUMP SHAFT
4 - HUB
RSPUMP19-29
PUMP (Continued)

(4) Install the power steering fluid pressure line
into the pressure output fitting of the power steering
pump (Fig. 11). Tighten the pressure line to pump fit-
ting tube nut to a torque of 31 N´m (275 in. lbs.).
(5) Install the power steering fluid low-pressure
return hose on the power steering pump low pressure
fitting (Fig. 11).Be sure hose clamps are prop-
erly reinstalled.
(6) Raise the vehicle.
(7) Install the routing clip on the engine for the
pressure hose (Fig. 10).
(8) Tighten the pump thru-bolt (Fig. 9). Tighten to
54 N´m (40 ft. lbs.) torque.
(9) Install the serpentine drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION).
(10) Install the drive belt splash shield.
(11) Lower the vehicle.
(12) Install the wiper module (unit)(Refer to 8 -
ELECTRICAL/WIPERS/WASHERS/WIPER MOD-
ULE - INSTALLATION).
(13) Connect the negative battery cable on the
negative battery post.
(14) Fill and bleed the power steering system
using the Power Steering Pump Initial Operation
Procedure (Refer to 19 - STEERING/PUMP - STAN-
DARD PROCEDURE).
(15) Inspect for leaks.
SPECIAL TOOLS
POWER STEERING PUMP
FLUID
STANDARD PROCEDURE - POWER STEERING
FLUID LEVEL CHECKING
WARNING: FLUID LEVEL SHOULD BE CHECKED
WITH THE ENGINE OFF TO PREVENT INJURY
FROM MOVING PARTS.
The fluid level can be read on the exterior of the
power steering fluid reservoir. The fluid level should
be within the ªFILL RANGEº when the fluid is at
normal ambient temperature, approximately 21ÉC to
27ÉC (70ÉF to 80ÉF) (Fig. 15).
Before removing the power steering filler cap, wipe
the reservoir filler cap free of dirt and debris. Do not
overfill the power steering system. Use onlyMopart
Power Steering Fluid (MS-5931)or quivalent.
FLUID COOLER
DESCRIPTION
All models of this vehicle are equipped with a
cooler for the power steering system fluid. The power
steering fluid cooler is located on the front suspen-
sion cradle crossmember reinforcement (Fig. 16).
There are two different size coolers offered depending
on options. There is a standard 6-inch and an 8-inch
for vehicles equipped with the heavy duty cooling
package.
OPERATION
The purpose of the power steering fluid cooler is to
keep the temperature of the power steering system
fluid from rising to a level that would affect the per-
formance of the power steering system.
Installer C-4063B
Puller C-4333
Fig. 15 POWER STEERING FLUID RESERVOIR
19 - 30 PUMPRS
PUMP (Continued)

PUMP
TABLE OF CONTENTS
page page
PUMP
DESCRIPTION............................6
REMOVAL...............................6
INSTALLATION............................6RESERVOIR
DESCRIPTION............................7
REMOVAL...............................7
INSTALLATION............................7
PUMP
DESCRIPTION - PUMP (2.5L DIESEL)
Hydraulic pressure for the operation of the power
steering gear is provided by a belt driven power
steering pump. The power steering pump is mounted
front lower right corner of the engine (Fig. 2).
The pump has a supply fitting for fluid coming
from the reservoir and a pressure port for exiting
fluid that is headed for the steering gear.
REMOVAL - PUMP (2.5L DIESEL)
(1) Remove the negative (-) battery cable from the
battery and isolate cable.
(2) Remove the fill cap from the power steering
fluid reservoir.
(3) Using a siphon pump, remove as much power
steering fluid as possible from the fluid reservoir.
(4) Raise the vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
(5) Remove the splash shields from below the
engine compartment.
(6) Remove the accessory drive belt from the power
steering pump pulley. (Refer to 7 - COOLING/AC-
CESSORY DRIVE/DRIVE BELTS - REMOVAL)
(7) Disconnect the fluid supply hose from the
pump (Fig. 1).
(8) Disconnect the pressure hose from the pump
(Fig. 1).
(9) Remove the bolt fastening the stamped bracket
on the rear of the pump to the cast bracket (Fig. 2).
(10) Remove the three front mounting bolts
through the pulley.
(11) Remove the pump from the cast bracket and
vehicle.
INSTALLATION - PUMP (2.5L DIESEL)
(1) Install the power steering pump on its cast
mounting bracket.
(2) Install the three front power steering pump
mounting bolts. Tighten the mounting bolts to a
torque of 54 N´m (40 ft. lbs.).(3) Install the rear mounting bolt fastening the
stamped bracket to the cast bracket (Fig. 2). Tighten
the mounting bolt to a torque of 54 N´m (40 ft. lbs.).
NOTE: Before installing power steering pressure
hose on power steering pump, inspect the O-ring
on the power steering pressure hose for damage
and replace if required.
(4) Install the power steering fluid pressure hose
fitting into the pressure port of the power steering
pump (Fig. 1). Tighten the pressure line to pump fit-
ting tube nut to a torque of 31 N´m (275 in. lbs.).
(5) Install the power steering fluid supply hose on
the power steering pump supply fitting (Fig. 1).Be
sure hose clamp is properly reinstalled.
(6) Install the accessary drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION).
Fig. 1 POWER STEERING PUMP - 2.5L DIESEL
1 - PRESSURE HOSE
2 - HOSE CLAMP
3 - SUPPLY HOSE
4 - POWER STEERING PUMP
19a - 6 PUMPRG

Performance Temperature and Pressure
Ambient Temperature 21É C
(70É F)27É C
(80É F)32É C
(90É F)38É C
(100É F)43É C
(110É F)
Left Center Panel
Outlet Discharge Air
Temperature1to8ÉC
(34 to 46É F)3to9ÉC
(37 to 49É F)4 to 10ÉC
(39 to 50É F)6to11ÉC
(43 to 52É F)7 to 18É C
(45 to 65É F)
Discharge Pressure
(High Side Service
Port)1034 to 1724
kPa
(150 to 250
psi)1517 to 2275
kPa
(220 to 330
psi)1999 to 2620
kPa
(290 to 380
psi)2068 to 2965
kPa
(300 to 430
psi)2275 to 3421
kPa
(330 to 450 psi)
Suction Pressure (Low
Side Service Port)103 to 207 kPa
(15 to 30 psi)117 to 221 kPa
(17 to 32 psi)138 to 241 kPa
(20 to 35 psi)172 to 269 kPa
(25 to 39 psi)207 to 345 kPa
(30 to 50 psi)
DIAGNOSIS AND TESTING - HEATER
PERFORMANCE TEST
PRE-DIAGNOSTIC PREPARATIONS
WARNING: REFER TO THE APPLICABLE WARN-
INGS AND CAUTIONS FOR THIS SYSTEM BEFORE
PERFORMING THE FOLLOWING OPERATION.
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING FRONT - WARNING - HEATER PLUMB-
ING).
Check the coolant level, drive belt tension, radiator
air flow, and cooling fan operation. Start the engine
and allow it to warm up to normal temperature.
MAXIMUM HEATER OUTPUT: TEST AND ACTION
Engine coolant is provided to the heater system by
two 16 mm (5/8 inch inside diameter) heater hoses.
With the engine idling at normal running tempera-
ture, set the heater-A/C controls as follows. Temper-
ature control to full Heat, Mode control to Floor,
Blower control to the highest speed setting. Using a
test thermometer, check the air temperature coming
from the center floor outlets and compare this read-
ing to the Temperature Reference table.
TEMPERATURE REFERENCE
AMBIENT
TEMPERATUREMINIMUM FLOOR
OUTLET TEMPERATURE
CELSIUS FAHRENHEIT CELSIUS FAHRENHEIT
15.5É 60É 62.2É 144É
21.1É 70É 63.8É 147É
26.6É 80É 65.5É 150É
32.2É 90É 67.2É 153ÉIf the floor outlet air temperature is insufficient,
check that the cooling system is operating to specifi-
cations. (Refer to 7 - COOLING/ENGINE - DIAGNO-
SIS AND TESTING). Both heater hoses should be
HOT to the touch (the coolant return hose should be
slightly cooler than the supply hose). If the coolant
return hose is much cooler than the supply hose,
locate and repair the engine coolant flow obstruction
in heater system.
POSSIBLE LOCATIONS OR CAUSE OF OBSTRUCTED
COOLANT FLOW
²Pinched or kinked heater hoses.
²Improper heater hose routing.
²Plugged heater hoses or supply and return ports
at cooling system connections.
²Plugged heater core.
²Air locked heater core.
²Restrictor in backwards.
If coolant flow is verified and the heater floor out-
let temperature is insufficient, a mechanical problem
may exist.
POSSIBLE LOCATION OR CAUSE OF INSUFFICIENT HEAT
²Obstructed cowl air intake.
²Obstructed heater system outlets.
²Blend-air door not functioning properly.
TEMPERATURE CONTROL
If heater floor outlet temperature cannot be
adjusted with the heater-A/C control temperature
control lever, one of the following could require ser-
vice:
²Blend-air door binding.
²Faulty blend-air door motor.
²Improper engine coolant temperature.
²Faulty heater-A/C control.
24 - 6 HEATING & AIR CONDITIONINGRS
HEATING & AIR CONDITIONING (Continued)

(2) Install and tighten the two screws that secure
the blower motor resistor to the evaporator housing.
Tighten the screws to 2 N´m (17 in. lbs.).
(3) Reconnect the blower motor pigtail wire con-
nector to the blower motor resistor connector recep-
tacle.
(4) Reconnect the instrument panel wire harness
connector for the blower motor resistor to the resistor
connector receptacle.
(5) Flex both sides of the glove box bin inward
near the top far enough for the rubber glove box stop
bumpers to clear the sides of the glove box opening,
then roll the glove box upward.
(6) Close and latch the glove box.
(7) Reconnect the battery negative cable.
COMPRESSOR CLUTCH
DESCRIPTION
The compressor clutch assembly consists of a sta-
tionary electromagnetic coil with a zener diode, a hub
bearing and pulley assembly, and a clutch plate (Fig.
12). The electromagnetic coil unit and the hub bear-
ing and pulley assembly are each retained on the
nose of the compressor front housing with snap rings.
The clutch plate is keyed or splined to the compres-
sor shaft, and secured with a bolt.
The compressor clutch plate and pulley unit, or the
clutch coil are available for separate service replace-
ment. The clutch coil zener diode is integral to the
clutch coil pigtail wire and connector and, if faulty ordamaged, the clutch electromagnetic coil unit must
be replaced.
OPERATION
The compressor clutch components provide the
means to engage and disengage the compressor from
the engine serpentine accessory drive belt. When the
clutch coil is energized, it magnetically draws the
clutch plate into contact with the clutch pulley and
drives the compressor shaft. When the coil is not
energized, the pulley freewheels on the clutch hub
bearing, which is part of the pulley.
A zener diode is connected in parallel with the
clutch electromagnetic coil. This diode controls the
dissipation of voltage induced into the coil windings
by the collapsing of the electromagnetic fields that
occurs when the compressor clutch is disengaged.
The zener diode dissipates this induced voltage by
regulating a current path to ground. This arrange-
ment serves to protect other circuits and components
from potentially damaging voltage spikes in the vehi-
cle electrical system that might occur if the voltage
induced in the clutch coil windings could not be dis-
sipated.
The compressor clutch engagement is controlled by
several components: the heater-A/C controls in the
passenger compartment, the A/C pressure transducer
on the liquid line, the evaporator temperature sensor
on the expansion valve, the Powertrain Control Mod-
ule (PCM) in the engine compartment, and the com-
pressor clutch relay in the Intelligent Power Module
(IPM). The PCM may delay compressor clutch
engagement for up to thirty seconds. (Refer to 8 -
Fig. 11 Blower Motor Resistor
1 - BLOWER MOTOR RESISTOR
2 - INSTRUMENT PANEL WIRE HARNESS
3 - SCREW (2)
4 - GLOVE BOX OPENING LOWER REINFORCEMENT
5 - BLOWER MOTOR PIGTAIL WIRE
6 - EVAPORATOR HOUSING
Fig. 12 Compressor Clutch - Typical
1 - CLUTCH PLATE
2 - SHAFT KEY (SOME MODELS)
3 - PULLEY AND BEARING
4 - CLUTCH COIL
5 - CLUTCH SHIMS
6 - SNAP RING
7 - SNAP RING
RSCONTROLS - FRONT24-17
BLOWER MOTOR RESISTOR (Continued)