check engine CHRYSLER VOYAGER 1996 Service Manual

²Improper operation
HARD SHIFTING
Hard shifting may be caused by a misadjusted
crossover cable. If hard shifting is accompanied by
gear clash, synchronizer clutch and stop rings or gear
teeth may be worn or damaged.
Misassembled synchronizer components also cause
shifting problems. Incorrectly installed synchronizer
sleeves, struts, or springs can cause shift problems.
NOISY OPERATION
Transaxle noise is most often a result of worn or
damaged components. Chipped, broken gear or syn-
chronizer teeth, and brinnelled, spalled bearings all
cause noise.
Abnormal wear and damage to the internal compo-
nents is frequently the end result of insufficient
lubricant.
SLIPS OUT OF GEAR
Transaxle disengagement may be caused by mis-
aligned or damaged shift components, or worn teeth
on the drive gears or synchronizer components. Incor-
rect assembly also causes gear disengagement.
LOW LUBRICANT LEVEL
Insufficient transaxle lubricant is usually the
result of leaks, or inaccurate fluid level check or refill
method. Leakage is evident by the presence of oil
around the leak point. If leakage is not evident, the
condition is probably the result of an underfill.
If air±powered lubrication equipment is used to fill
a transaxle, be sure the equipment is properly cali-
brated. Equipment out of calibration can lead to an
underfill condition.
The transaxle fill plug is located on the lower left
side of the transaxle end cover. With the vehicle at a
level position, remove the fill plug and check the
level of the lubricant. The lubricant level should be
within 3.175mm (1/8 inch) from the bottom of the fill
hole. If the lubricant level is low, fill the transaxle to
the bottom of the fill hole with SAE 5W-30 engine oil,
meeting SG and/or SG-CD qualifications, as the fac-
tory fill lubricant. SAE GL5 10W-40 engine oil is a
suitable service fill alternative.
CLUTCH PROBLEMS
Worn, damaged, or misaligned clutch components
can cause difficult shifting, gear clash, and noise.
A worn or damaged clutch disc, pressure plate, or
release bearing can cause hard shifting and gear
clash.
SERVICE PROCEDURES
FLUID DRAIN AND FILL
TRANSAXLE FLUID DRAIN
(1) Hoist vehicle.
(2) Install a drain pan underneath the transaxle
drain plug.
(3) Remove the transaxle drain plug. The drain
plug is located on the bottom of the transaxle hous-
ing.
(4) Let fluid drain out till there is just an occa-
sional drip.
(5) Reinstall drain plug. Tighten drain plug to 28
N´m (250 in. lbs.)
TRANSAXLE FLUID FILL
NOTE: All A-598 transaxles are equipped with a fill
plug. The fill plug is located on the end cover side
of the transaxle.
(1) Remove transaxle fill plug
The fluid level should be within 3.175mm (1/8
inch) from the bottom of the transaxle fill hole (vehi-
cle must be level when checking).
(2) Fill transaxle to proper level with SAE 5W-30
engine oil, meeting SG and/or SG-CD qualifications.
G5 SAE 10W-40 engine oil is a suitable service fill
alternative. Dry fill lubricant capacity is approxi-
mately 1.9-2.2 liters (4.0-4.6 pints)..
(3) Wipe the outside of the transaxle if any lubri-
cant spills.
(4) Reinstall transaxle fill plug.
FLUID DRAIN AND FILLÐRHD VEHICLES
TRANSAXLE FLUID DRAIN
(1) Hoist vehicle.
(2) Install a drain pan underneath the transaxle
drain plug.
(3) Remove the transaxle drain plug. The drain
plug is located on the bottom of the transaxle hous-
ing (Fig. 5).
(4) Let fluid drain out till there is just an occa-
sional drip.
(5) Reinstall drain plug. Tighten drain plug to 28
N´m (250 in. lbs.)
TRANSAXLE FLUID FILL
NOTE: All A-558 transaxles are equipped with a fill
plug. The fill plug is located on the end cover side
of the transaxle.
(1) Remove transaxle fill plug
21 - 4 A±598 MANUAL TRANSAXLENS/GS
DIAGNOSIS AND TESTING (Continued)

The fluid level should be within 3.175mm (1/8
inch) from the bottom of the transaxle fill hole (vehi-
cle must be level when checking).
(2) Fill transaxle to proper level with SAE 5W-30
engine oil, meeting SG and/or SG-CD qualifications.
G5 SAE 10W-40 engine oil is a suitable service fill
alternative. Dry fill lubricant capacity is approxi-
mately 1.9-2.2 liters (4.0-4.6 pints).
(3) Wipe the outside of the transaxle if any lubri-
cant spills.
(4) Reinstall transaxle fill plug.
REMOVAL AND INSTALLATION
GEARSHIFT KNOB
REMOVAL
(1) Pull shifter boot down and away from shifter
roll pin.
(2) Pry legs of shift knob away from shift lever roll
pin using a flat blade pry tool (Fig. 6).(3) Remove knob from shifter handle.
INSTALLATION
(1) For installation, reverse removal procedure,
omitting step (2).
GEARSHIFT BOOT
REMOVAL
(1) Remove shifter knob. Refer to gearshift knob
removal.
(2) Pull up on boot until retention clips disengage
from the console and remove (Fig. 7).
INSTALLATION
(1) For installation, reverse removal procedure,
taking care to fully engage the retention clips.
GEARSHIFT BOOT
REMOVAL
(1) Remove shifter knob. Refer to gearshift knob
removal.
(2) Pull up on boot until retention clips disengage
from the console and remove (Fig. 8).
INSTALLATION
(1) For installation, reverse removal procedure,
taking care to fully engage the retention clips.
GEARSHIFT CABLES
REMOVAL
(1) Disconnect battery negative cable.
(2) Remove air cleaner assembly.
(3) Disconnect gearshift cable ends from transaxle
shift levers (Fig. 9) (Fig. 10).
CAUTION: Pry up with equal force on both sides of
shifter cable isolator bushings to avoid damaging
cable isolator bushings.
Fig. 5 Transaxle Drain Plug
Fig. 6 Shifter Knob
Fig. 7 Shifter Boot
NS/GSA±598 MANUAL TRANSAXLE 21 - 5
SERVICE PROCEDURES (Continued)

INSTALLATION
(1) To install, reverse removal procedure. After
cables have been replaced, cable adjustment should
be checked. Refer to cable adjustment procedure in
this section.
NOTE: High temperature tie straps must be used
when replacing cable(s). Locate the new tie strap at
the white band on the crossover cable and cinch
cables tightly together.
CAUTION: Only the crossover cable is adjustable.
The selector cable does not have any adjustment
capabilities.
GEARSHIFT CABLESÐRHD VEHICLES
REMOVAL
(1) Disconnect battery negative cable.
(2) Remove air cleaner assembly.(3) Disconnect gearshift cable ends from transaxle
shift levers (Fig. 16) (Fig. 17).
CAUTION: Pry up with equal force on both sides of
shifter cable isolator bushings to avoid damaging
cable isolator bushings.
(4) Remove cable to bracket retaining clips at tran-
saxle (Fig. 18).
CAUTION: It is recommended that new cable retain-
ing clips be used for reinstallation.
(5) Pull cables up out of engine mount bracket.
(6) Remove gearshift knob and boot. Refer to Knob
and Boot Removal in this section.
(7) Remove console screws (Fig. 19).
(8) Remove cable retaining clips at shifter (Fig. 20)
(Fig. 21).
CAUTION: It is recommended that new cable retain-
ing clips be used for reinstallation. Clips must be
installed to span the slotted holes.
(9) Disconnect shift cables from shifter. Pry with
equal force on both sides of shifter cable isolator
bushings to avoid damaging bushings.
(10) Lift vehicle on hoist. Cut gearshift cable tie
strap at floor pan with diagonal cutters.
(11) Remove shift cables from vehicle by grasping
cables and grommets one at a time and tugging down
through floor pan holes (Fig. 22).
INSTALLATION
(1) To install, reverse removal procedure. After
cables have been replaced, cable adjustment should
be checked. Refer to cable adjustment procedure in
this section.
NOTE: High temperature tie straps must be used
when replacing cable(s). Locate the new tie strap at
the white band on the crossover cable and cinch
cables tightly together.
CAUTION: Only the crossover cable is adjustable.
The selector cable does not have any adjustment
capabilities.
GEARSHIFT MECHANISM REPLACEMENT
REMOVAL
(1) Remove shifter knob and boot. refer to Shifter
Knob And Boot Removal procedure in this section.
(2) Remove console assembly. Refer to Console
Removal procedure in this section.
Fig. 13 Selector Cable Clip
Fig. 14 Crossover Cable Clip
NS/GSA±598 MANUAL TRANSAXLE 21 - 7
REMOVAL AND INSTALLATION (Continued)

(4) Check the transaxle for leaks and recheck the
level of the transaxle lubricant.
INPUT SHAFT FRONT BEARING RETAINER
REMOVAL
(1) Remove the transaxle assembly from the vehi-
cle. For removal procedure, refer to Transaxle,
Removal and Installation.
(2) From inside the bellhousing, remove the E-clip
retaining the clutch release lever shaft (Fig. 43).
(3) Pull release lever shaft out of the clutch bell-
housing (Fig. 44).
(4) Remove the clutch release bearing from the
input bearing retainer sleeve (Fig. 45).
(5) Remove the three bolts retaining the input
shaft bearing retainer sleeve (Fig. 46).
(6) Remove the input bearing retainer sleeve from
the front of the bellhousing.
INSTALLATION
(1) For installation, reverse removal procedure.
Use MopartGasket Maker to seal input bearing
retainer sleeve to bellhousing.
Fig. 40 Front Engine Mount (Left Side)
Fig. 41 Front Engine Mount (Right Side)
Fig. 42 Left Mount Bolts
Fig. 43 E-clip at Clutch Release Lever Shaft
Fig. 44 Clutch Release Shaft
NS/GSA±598 MANUAL TRANSAXLE 21 - 15
REMOVAL AND INSTALLATION (Continued)

NOTE: To avoid distortion of the drive plate, bolts
should be tightened a few turns at a time. Use a
crisscross pattern until all bolts are seated. Tighten
modular clutch plate bolts to 74 N´m (55 ft. lbs.).
NOTE: Lower control arm pinch bolts must be
installed with the bolt head rearward of the ball
joint.
(3) Fill transaxle to the proper level with the spec-
ified lubricant.
(4) While the vehicle is elevated slightly, run the
transaxle through all the forward gears. Apply
brakes and shift into reverse. Run the transaxle
through reverse gear.
(5) Check the transaxle for leaks and recheck the
level of the transaxle lubricant.
DISASSEMBLY AND ASSEMBLY
TRANSAXLE
The A-598 transaxle (Fig. 63) is similar to the
A-523, A-568 transaxle with the following exceptions.
The major differences are that the input shaft is sup-
ported by ball and roller bearings and the intermedi-
ate shaft is supported by tapered roller bearings.
Also the front intermediate bearing will not clear the
final drive gear for disassembly or reassembly.
In vehicle service is limited to:
²Shift cover components
²Sealing external joints and seals
²Service of 5th gear set and synchronizer
DISASSEMBLY
(1) Remove engine mount bracket (Fig. 64).
(2) Remove differential bearing retainer (Fig. 65).
(3) Remove extension housing (Fig. 66).
(4) Remove differential cover with soft-faced ham-
mer (Fig. 67).
Fig. 62 Modular Clutch Mounting
Fig. 61 Front Engine Mount (Right Side)
Fig. 63 A-598 Transaxle
21 - 20 A±598 MANUAL TRANSAXLENS/GS
REMOVAL AND INSTALLATION (Continued)

SPECIAL TOOLS
A-598 (T-750) MANUAL TRANSAXLE
A-558 MANUAL TRANSAXLEÐRHD VEHICLES
A-558 MANUAL TRANSAXLE FLUID FILL
The fluid level should be within 3.175mm (1/8 inch)
from the bottom of the transaxle fill hole (vehicle must
be level when checking).
Fill transaxle to proper level with SAE 5W-30 engine oil,
meeting SG and/or SG-CD qualifications. G5 SAE
10W-40 engine oil is a suitable service fill alternative.
TRANSAXLEMETRIC MEA-
SUREU.S. MEASURE
A-558 1.9-2.2 Liters 2.0-2.3 Quarts
Bearing Splitter 1130
Slide Hammer 3752
Bearing Remover 5066
Gear Holder 6252
Bearing Remover 6786
Bearing Remover 6787
21 - 60 A±598 MANUAL TRANSAXLENS/GS

HEATING AND AIR CONDITIONING
CONTENTS
page page
FRONT HEATING AND AIR CONDITIONING
SYSTEM............................... 1REAR HEATING AND AIR CONDITIONING
SYSTEM.............................. 41
FRONT HEATING AND AIR CONDITIONING SYSTEM
INDEX
page page
GENERAL INFORMATION
INTRODUCTION......................... 2
SAFETY PRECAUTIONS AND WARNINGS...... 2
DESCRIPTION AND OPERATION
A/C PRESSURE TRANSDUCER.............. 2
A/C SERVICE PORTS..................... 2
AIR DISTRIBUTION DUCTS................. 2
COMPRESSOR HIGH-PRESSURE RELIEF
VALVE................................ 3
CONDENSATE DRAIN..................... 3
ENGINE COOLING SYSTEM REQUIREMENTS . . 3
EVAPORATOR PROBE..................... 3
HANDLING TUBING AND FITTINGS........... 3
HVAC CONTROL MODULE................. 4
REAR BLOWER SPEED SWITCH............ 3
SIDE DOOR HEATER A/C OUTLETS.......... 4
SIDE WINDOW DEMISTER................. 4
SYSTEM AIRFLOW....................... 4
SYSTEM OIL LEVEL...................... 5
DIAGNOSIS AND TESTING
A/C PERFORMANCE TEST................ 12
A/C PRESSURE TRANSDUCER............. 12
ACTUATOR CALIBRATION/DIAGNOSTICS AND
COOLDOWN TEST...................... 6
BLOWER MOTOR AND WHEEL ASSEMBLY.... 13
COMPRESSOR CLUTCH/COIL.............. 13
COMPRESSOR NOISE DIAGNOSIS.......... 13
EXPANSION VALVE...................... 13
HEATER PERFORMANCE TEST............ 15
HVAC CONTROL DIAGNOSTIC CONDITIONS . . . 9
SYSTEM CHARGE LEVEL TEST............ 16SERVICE PROCEDURES
CHARGING REFRIGERANT SYSTEM........ 17
EVACUATING REFRIGERANT SYSTEM....... 18
R-134a REFRIGERANT................... 16
STICKING HVAC CONTROL MODULE PUSH
BUTTONS............................ 19
SYSTEM LEAK CHECKING................ 19
THERMOCOUPLE PROBE................. 19
REMOVAL AND INSTALLATION
A/C PRESSURE TRANSDUCER............. 20
A/C SERVICE PORTS.................... 20
BLEND-AIR DOOR ACTUATOR............. 20
BLOWER MOTOR AND WHEEL ASSEMBLY.... 21
BLOWER MOTOR RESISTOR BLOCK........ 21
BLOWER MOTOR WHEEL................. 22
COMPRESSOR CLUTCH/COIL.............. 23
COMPRESSOR......................... 23
CONDENSER ASSEMBLY................. 25
DISCHARGE LINE....................... 26
EVAPORATOR PROBE.................... 27
EXPANSION VALVE...................... 28
FILTER-DRIER ASSEMBLY................. 28
HEATER A/C UNIT HOUSING............... 29
HEATER CORE......................... 30
HEATER HOSES........................ 31
LIQUID LINE........................... 32
MODE DOOR ACTUATOR................. 32
RECIRC DOOR ACTUATOR................ 34
SIDE WINDOW DEMISTER DUCTS.......... 33
SUCTION LINE.......................... 33
DISASSEMBLY AND ASSEMBLY
HEATER A/C UNIT RECONDITION........... 34
NSHEATING AND AIR CONDITIONING 24 - 1

CAUTION: The refrigerant oil used in a R-134a A/C
system is unique. Use only oils which were
designed to work with R-134a refrigerant. The oil
designated for this vehicle is ND8 PAG (polyalka-
lene glycol).
SERVICING REFRIGERANT OIL LEVEL
(1) Using a refrigerant recovery machine, remove
refrigerant from the A/C system.
(2) Remove refrigerant lines from A/C compressor.
(3) Remove compressor from vehicle.
(4) From suction port on top of compressor, drain
refrigerant oil from compressor.
(5) Add system capacity minus the capacity of
components that have not been replaced through suc-
tion port on compressor. Refer to the Refrigerant Oil
Capacity Chart.
(6) Install compressor, connect refrigerant lines,
evacuate, and charge refrigerant system.
DIAGNOSIS AND TESTING
ACTUATOR CALIBRATION/DIAGNOSTICS AND
COOLDOWN TEST
GENERAL INFORMATION
If the HVAC control module is replaced, the Cali-
bration Diagnostic and Cooldown tests will need to
be performed. Once this group of tests have success-
fully passed, they can be performed individually. The
engine must be running during the test to provide
hot coolant for the heater, A/C compressor operation
and to assure that the actuators are calibrated cor-
rectly. The HVAC control module is capable of trou-
bleshooting the system in approximately 120 seconds.
If a condition is detected, an error code is displayed.
The error code cannot be erased until the condition is
repaired and the diagnostic test is performed. Check
wire before replacing components, refer to Group 8W,
Wiring Diagrams.CAUTION: Do not remove the actuators from the
Heater-A/C unit assembly with power applied.
Removal should only be done with the Ignition OFF.
The actuators have no mechanical stops to limit the
travel. If the actuator rotates and is not connected
to the unit assembly, it will become out of calibra-
tion.
ACTUATOR CALIBRATION
Mode, Blend and Zone (if equipped) door calibra-
tion compensates for mechanical variations in the
actuators, HVAC control module and its linkages. In-
vehicle calibration can be entered from the control's
front panel. If the REAR WIPE and INTERMIT-
TENT LED's flash simultaneously when Ignition is
cycled ON, the actuators have not been calibrated or
during the previous calibration a failure occurred
(Fig. 6) and (Fig. 7). Diagnostics will always occur
during Calibration Diagnostic and Cooldown test.
REFRIGERANT OIL CAPACITIES
Refrigerant
Oil Capaci-
tiesFront A/C Dual A/C
Component ml oz ml oz
Compressor 150 ml 5.0 oz 220 ml 7.4 oz
Filter-Drier 30 ml 1.0 oz 30 ml 1.0 oz
Condenser 30 ml 1.0 oz 30 ml 1.0 oz
Evaporator 60 ml 2.0 oz 60 ml 2 .0 oz
Rear Evap. N/A N/A 60 ml 2.0 oz
Fig. 6 Radio Bezel and HVAC Control
24 - 6 HEATING AND AIR CONDITIONINGNS
DESCRIPTION AND OPERATION (Continued)

probe will drop the temperature 7ÉC (20ÉF) in two
minutes. If the Evaporator Probe is found to be
faulty, check that the sensor is positioned in the
evaporator fins properly. If not, correct and repeat
test. If OK, replace the evaporator probe.
Once the repairs are completed, repeat the Calibra-
tion Diagnostic and Cooldown test. Repeating the
test is necessary to clear the fault codes.
A/C PERFORMANCE TEST
The air conditioning system is designed to remove
heat and humidity from the air entering the passen-
ger compartment. The evaporator, located in the
heater A/C unit, is cooled to temperatures near the
freezing point. As warm damp air passes over the
fins in the evaporator, moisture in the air condenses
to water, dehumidifying the air. Condensation on the
evaporator fins reduces the evaporators ability to
absorb heat. During periods of high heat and humid-
ity, an air conditioning system will be less effective.
With the instrument control set to RECIRC, only air
from the passenger compartment passes through the
evaporator. As the passenger compartment air dehu-
midifies, A/C performance levels rise.
PERFORMANCE TEST PROCEDURE
Review Safety Precautions and Warnings in this
group before proceeding with this procedure. Air tem-
perature in test room and on vehicle must be 21É C
(70ÉF) minimum for this test.
NOTE: When connecting the service equipment
coupling to the line fitting, verify that the valve of
the coupling is fully closed. This will reduce the
amount of effort required to make the connection.
(1) Connect a tachometer and manifold gauge set.
(2) Set control to A/C, RECIRC, and PANEL, tem-
perature lever on full cool and blower on high.
(3) Start engine and hold at 1000 rpm with A/C
clutch engaged.(4) Engine should be warmed up with doors and
windows closed.
(5) Insert a thermometer in the left center A/C
outlet and operate the engine for five minutes. The
A/C clutch may cycle depending on ambient condi-
tions.
(6) With the A/C clutch engaged, compare the dis-
charge air temperature to the A/C Performance Tem-
peratures table.
(7) If the discharge air temperature fails to meet
the specifications in the performance temperature
chart. Refer to the Refrigerant Service Procedures for
further diagnosis.
A/C PRESSURE TRANSDUCER
The work area temperature must not be below
10ÉC (50ÉF) to test the compressor clutch circuit.
Before starting to test the transducer ensure that the
wire connector is clean of corrosion and connected
properly.
(1) With gear selector in park or neutral and park
brake set, start engine and allow to idle.
(2) Install scan tool (DRB):
²Go to main menu
²Select stand alone scan tool (DRB)
²Select refer to the proper year diagnostics
²Select climate control
²Select sensor display
²Select A/C high side volts
For A/C system to operate a voltage between .451
(Low Pressure Cutout) to 4.519 (High Pressure Cut-
out is required. Voltages outside this range indicate a
low or high pressure condition andwill notallow
the compressor to cycle.
Refer to the A/C Pressure Transducer Voltage table
for the appropriate condition(s):
A/C PERFORMANCE TEMPERATURES
AMBIENT TEMPERATURE 21ÉC
(70ÉF)26.5ÉC
(80ÉF)32ÉC
(90ÉF)37ÉC
(100ÉF)43ÉC
(110ÉF)
AIR TEMPERATURE AT LEFT
CENTER PANEL OUTLET1-8ÉC
(34-46ÉF)3-9ÉC
(37-49ÉF)4-10ÉC
(39-50ÉF)6-11ÉC
(43-52ÉF)7-18ÉC
(45-65ÉF)
COMPRESSOR DISCHARGE
PRESSURE AFTER THE FILTER
DRIER1034-1724
kPa
(150-250
PSI)1517-2275
kPa
(220-330
PSI)1999-2620
kPa
(290-380
PSI)2068-2965
kPa
(300-430
PSI)2275-3421
kPa
(330-496
PSI)
EVAPORATOR SUCTION
PRESSURE103-207 kPa
(15-30 PSI)117-221 kPa
(17-32 psi)138-241 kPa
(20-35 PSI)172-269 kPa
(25-39 PSI)207-345 kPa
(30-50 PSI)
24 - 12 HEATING AND AIR CONDITIONINGNS
DIAGNOSIS AND TESTING (Continued)

BLOWER MOTOR AND WHEEL ASSEMBLY
VIBRATION AND/OR NOISE DIAGNOSIS
The blower speed switch, in conjunction with the
resistor block, supplies the blower motor with varied
voltage.
CAUTION: Stay clear of the blower motor and resis-
tor block (Hot). Do not operate the blower motor
with the resistor block removed from the heater A/C
housing.
Refer to the Blower Motor Vibration/Noise chart in
this section for diagnosis.
COMPRESSOR NOISE DIAGNOSIS
Excessive noise while the A/C is being used, can be
caused by loose mounts, loose clutch, or high operat-
ing pressure. Verify compressor drive belt condition,
proper refrigerant charge and head pressure before
compressor repair is performed.
If the A/C drive belt slips at initial start-up, it does
not necessarily mean the compressor has failed.
With the close tolerances of a compressor it is pos-
sible to experience a temporary lockup. The longer
the A/C system is inactive, the more likely the condi-
tion to occur.
This condition is the result of normal refrigerant
movement within the A/C system caused by temper-
ature changes. The refrigerant movement may wash
the oil out of the compressor.
COMPRESSOR CLUTCH/COIL
The air conditioning compressor clutch electrical
circuit is controlled by the Powertrain Control Mod-
ule. It is located in the engine compartment outboard
of the battery.If the compressor clutch does not engage verify
refrigerant charge.
If the compressor clutch still does not engage check
for battery voltage at the pressure transducer located
on the liquid line. If voltage is not detected, refer to:
²Group 8W, Wiring diagrams.
²Powertrain Diagnostic Procedures manual for
diagnostic information.
If voltage is detected at the pressure transducer,
connect pressure transducer and check for battery
voltage between the compressor clutch connector ter-
minals.
If voltage is detected, perform A/C Clutch Coil
Tests.
TESTS
(1) Verify battery state of charge. (Test indicator in
battery should be green).
(2) Connect an ampmeter (0-10 ampere scale) in
series with the clutch coil terminal. Use a voltmeter
(0-20 volt scale) with clip leads measuring voltage
across the battery and A/C clutch.
(3) With A/C control in A/C mode and blower at
low speed, start the engine and run at normal idle.
(4) The A/C clutch should engage immediately and
the clutch voltage should be within two volts of the
battery voltage. If the A/C clutch does not engage,
test the fuse.
(5) The A/C clutch coil is acceptable if the current
draw is 2.0 to 3.7 amperes at 11.5-12.5 volts at clutch
coil. This is with the work area temperature at 21ÉC
(70ÉF). If voltage is more than 12.5 volts, add electri-
cal loads by turning on electrical accessories until
voltage reads below 12.5 volts.
(6) If coil current reads zero, the coil is open and
should be replaced. If the ammeter reading is 4
amperes or more, the coil is shorted and should be
replaced. If the coil voltage is not within two volts of
the battery voltage, test clutch coil feed circuit for
excessive voltage drop.
EXPANSION VALVE
NOTE: Special effort must be used to keep all
R-134a system components moisture-free. Moisture
in the oil is very difficult to remove and will cause a
reliability problem with the compressor.
TESTS
NOTE: Expansion valve tests should be performed
after compressor tests.
Review Safety Precautions and Warnings in this
group. The work area and vehicle temperature must
A/C PRESSURE TRANSDUCER VOLTAGE
VOLTAGE CONDITION
0 TRANSDUCER FAULTY
OR NO VOLTAGE FROM
PCM
.150 TO .450 TRANSDUCER
GOOD/LOW PRESSURE
CUTOUT CONDITION
.451 TO 4.519 NORMAL OPERATING
CONDITION
4.520 TO 4.850 TRANSDUCER
GOOD/HIGH
PRESSURE CUTOUT
CONDITION
5 TRANSDUCER FAULTY
NSHEATING AND AIR CONDITIONING 24 - 13
DIAGNOSIS AND TESTING (Continued)