2001 DODGE TOWN AND COUNTRY CD changer

Component Page
C326............................. 8W-80-41
C327............................. 8W-80-41
C327............................. 8W-80-41
C329 (Diesel)....................... 8W-80-42
C329 (Diesel)....................... 8W-80-42
C330 (Diesel)....................... 8W-80-42
C330 (Diesel)....................... 8W-80-42
C331 (Diesel)....................... 8W-80-42
C331 (Diesel)....................... 8W-80-43
C332 (ATC)........................ 8W-80-43
C332 (ATC)........................ 8W-80-43
Cabin Heater Assist C1 (Diesel)........ 8W-80-43
Cabin Heater Assist C2 (Diesel)........ 8W-80-44
Camshaft Position Sensor (Gas)........ 8W-80-44
Camshaft Position Sensor (Diesel)...... 8W-80-44
CD Changer....................... 8W-80-44
Center Dome Lamp (Base/High Line).... 8W-80-45
Center High Mounted Stop Lamp....... 8W-80-45
Clockspring C1..................... 8W-80-45
Clockspring C2..................... 8W-80-45
Clockspring C3..................... 8W-80-45
Clockspring C4..................... 8W-80-46
Clockspring C5..................... 8W-80-46
Clutch Departure Switch (Diesel)....... 8W-80-46
Clutch Interlock/Upstop Switch (MTX) . . . 8W-80-46
Controller Antilock Brake............. 8W-80-47
Crank Case Ventilation Heater (Diesel) . . 8W-80-47
Crankshaft Position Sensor (Diesel)..... 8W-80-48
Crankshaft Position Sensor (Gas)....... 8W-80-48
Data Link Connector................. 8W-80-48
Diagnostic Junction Port.............. 8W-80-49
Dosing Pump....................... 8W-80-49
Driver Airbag C1.................... 8W-80-49
Driver Airbag C2.................... 8W-80-49
Driver Blend Door Actuator (ATC)...... 8W-80-50
Driver Blend Door Actuator (MTC)...... 8W-80-50
Driver Door Courtesy Lamp........... 8W-80-50
Driver Door Lock Switch.............. 8W-80-50
Driver Heated Seat Back............. 8W-80-50
Driver Heated Seat Cushion........... 8W-80-51
Driver Heated Seat Module C1......... 8W-80-51
Driver Heated Seat Module C2......... 8W-80-51
Driver Heated Seat Module C3......... 8W-80-51
Driver Power Seat Front Riser Motor.... 8W-80-52
Driver Power Seat Horizontal Motor..... 8W-80-52
Driver Power Seat Rear Riser Motor.... 8W-80-52
Driver Power Seat Recliner Motor...... 8W-80-52
Driver Power Seat Switch............. 8W-80-52
Driver Power Window Motor........... 8W-80-53
Driver Power Window Switch (LHD)..... 8W-80-53
Driver Power Window Switch (RHD).... 8W-80-53
Driver Seat Belt Switch.............. 8W-80-54
Driver Seat Belt Tensioner............ 8W-80-54
EGR Solenoid (Diesel)................ 8W-80-54Component Page
EGR Solenoid (Gas)................. 8W-80-54
Electric Wiper De-Icer C1............. 8W-80-54
Electric Wiper De-Icer C2............. 8W-80-55
Engine Control Module C1 (Diesel)...... 8W-80-55
Engine Control Module C2 (Diesel)...... 8W-80-57
Engine Coolant Temp Sensor (Diesel).... 8W-80-57
Engine Coolant Temp Sensor (Gas)...... 8W-80-58
Engine Oil Pressure Sensor (Diesel)..... 8W-80-58
Engine Oil Pressure Switch (Gas)....... 8W-80-58
Engine Oil Temperature Sensor (Diesel) . . 8W-80-58
EVAP/Purge Solenoid (Gas)............ 8W-80-58
Evaporator Temperature Sensor........ 8W-80-59
Floor Console Lamp................. 8W-80-59
Floor Console Power Outlet........... 8W-80-59
Front Blower Module C1 (ATC)......... 8W-80-59
Front Blower Module C2 (ATC)......... 8W-80-59
Front Cigar Lighter................. 8W-80-60
Front Reading Lamps/Switch.......... 8W-80-60
Front Washer Pump Motor............ 8W-80-60
Fuel Heater (Diesel)................. 8W-80-60
Fuel Injector No. 1 (2.4L/3.3L/3.8L)..... 8W-80-60
Fuel Injector No. 1 (Diesel)............ 8W-80-61
Fuel Injector No. 2 (2.4L/3.3L/3.8L)..... 8W-80-61
Fuel Injector No. 2 (Diesel)............ 8W-80-61
Fuel Injector No. 3 (2.4L/3.3L/3.8L)..... 8W-80-61
Fuel Injector No. 3 (Diesel)............ 8W-80-61
Fuel Injector No. 4 (2.4L/3.3L/3.8L)..... 8W-80-62
Fuel Injector No. 4 (Diesel)............ 8W-80-62
Fuel Injector No. 5 (3.3L/3.8L)......... 8W-80-62
Fuel Injector No. 6 (3.3L/3.8L)......... 8W-80-62
Fuel Pressure Sensor (Diesel).......... 8W-80-62
Fuel Pressure Solenoid (Diesel)......... 8W-80-63
Fuel Pump Module.................. 8W-80-63
Generator......................... 8W-80-63
Glove Box Lamp.................... 8W-80-63
Glow Plug Relay (Diesel).............. 8W-80-63
Halo Lamp........................ 8W-80-64
Headlamp Switch................... 8W-80-64
Headlamp Washer Pump Motor
(Built-Up-Export)................. 8W-80-64
High Note Horn.................... 8W-80-64
Hood Ajar Switch................... 8W-80-65
Idle Air Control Motor (2.4L).......... 8W-80-65
Idle Air Control Motor (3.3L/3.8L)....... 8W-80-65
Ignition Coil (2.4L).................. 8W-80-65
Ignition Coil (3.3L/3.8L).............. 8W-80-65
Ignition Switch..................... 8W-80-66
Inlet Air Temperature Sensor.......... 8W-80-66
Instrument Cluster.................. 8W-80-66
Instrument Panel Switch Bank......... 8W-80-67
Intelligent Power Module C1.......... 8W-80-67
Intelligent Power Module C2.......... 8W-80-68
Intelligent Power Module C3 (Diesel).... 8W-80-68
Intelligent Power Module C3 (Gas)...... 8W-80-69
8Wa - 80 - 2 8W-80 CONNECTOR PIN-OUTSRG
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CABIN HEATER ASSIST C2 (DIESEL) - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 A119 14RD/OR FUSED B(+)
2 Z149 14BK/DB GROUND
CAMSHAFT POSITION SENSOR (GAS) - BLACK 3 WAY
CAV CIRCUIT FUNCTION
1 F888 18BR/PK 8 VOLT SUPPLY
2 K900 18DB/DG SENSOR GROUND
3 K44 18DB/GY CAMSHAFT POSITION SENSOR SIGNAL
CAMSHAFT POSITION SENSOR (DIESEL) - BLACK 3 WAY
CAV CIRCUIT FUNCTION
1 K944 20BK/GY CAMSHAFT POSITION SENSOR GROUND
2 K44 20DB/GY CAMSHAFT POSITION SENSOR SIGNAL
3 K342 16BR/WT ECM/PCM RELAY OUTPUT
CD CHANGER-8WAY
CAV CIRCUIT FUNCTION
1 X40 24GY/WT (BUILT-UP-EXPORT) AUDIO OUT RIGHT
1 X40 20GY/WT (EXCEPT BUILT-UP-EX-
PORT)AUDIO OUT RIGHT
2 E14 24OR/TN (BUILT-UP-EXPORT) PANEL LAMPS DRIVER
2 E14 18OR/TN (EXCEPT BUILT-UP-EX-
PORT)PANEL LAMPS DRIVER
3 D25 20WT/VT (EXCEPT BUILT-UP-EX-
PORT)PCI BUS
3 D25 24VT/YL (BUILT-UP-EXPORT) PCI BUS
4 X112 24RD (BUILT-UP-EXPORT) IGNITION SWITCH OUTPUT
4 X112 20RD (EXCEPT BUILT-UP-EX-
PORT)IGNITION SWITCH OUTPUT
5 X41 20DG/WT (EXCEPT BUILT-UP-EX-
PORT)AUDIO OUT LEFT
5 X41 24DG/WT (BUILT-UP-EXPORT) AUDIO OUT LEFT
6 Z140 24BK/OR (BUILT-UP-EXPORT) GROUND
6 Z140 18BK/OR (EXCEPT BUILT-UP-
EXPORT)GROUND
7 Z141 18BK/TN (EXCEPT BUILT-UP-
EXPORT)GROUND
7 Z141 22BK/TN (BUILT-UP-EXPORT) GROUND
8 X160 22GY/YL (BUILT-UP-EXPORT) B(+)
8 X160 20GY/YL (EXCEPT BUILT-UP-
EXPORT)B(+)
8Wa - 80 - 44 8W-80 CONNECTOR PIN-OUTSRG
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Component/Ground Color Location Fig.
C326 YL At Driver Side Airbag N/S
C327 YL At Passenger Side Airbag N/S
C329 (Diesel) BK Left Rear Engine Compartment N/S
C330 (Diesel) LTGY Left Rear Engine Compartment N/S
C331 (Diesel) BK Left Rear Engine Compartment N/S
Cabin Heater Assist C1 (Diesel) BK Top of Engine 12, 13
Cabin Heater Assist C2 (Diesel) BK Top of Engine 12, 13
Camshaft Position Sensor BK Rear of Cylinder Head
Right Side of EngineN/S
Camshaft Position Sensor
(Diesel)BK Rear of Cylinder Head 12, 13
CD Changer Behind CD Changer N/S
Center Dome Lamp GY At Lamp N/S
Center High Mounted Stop Lamp BK At Lamp 38
Clockspring - C1 WT Steering Column 16, 17, 18,
19, 26
Clockspring - C2 YL Steering Column 16, 17, 18
19, 26
Clockspring - C3 BK Steering Column N/S
Clockspring - C4 BK Steering Column N/S
Clockspring - C5 YL Steering Column N/S
Clutch Departure Switch (MTX) RD At Switch/Driver Side 32
Clutch Interlock/Upstop Switch
(MTX)BK At Switch/Driver Side 32
Controller Anti-Lock Brake BK Right Side of Engine Compartment 10, 11, 13,
14, 15
Crank Case Ventilation Heater
(Diesel)BK Top of Cylinder Head 12
Crankshaft Position Sensor
(Diesel)BK Rear of Engine 13
Crankshaft Position Sensor (Gas) BK Rear of Engine 10, 14
Data Link Connector WT Lower Instrument Panel Near Steering Column 31, 32
Diagnostic Junction Port BK Lower Instrument Panel Near Steering Column 31, 32
Dosing Pump BK Top of Engine N/S
Driver Airbag C1 BN Steering Column N/S
Driver Airbag C2 BK Steering Column N/S
Driver Blend Actuator (ATC) GY On HVAC N/S
Driver Blend Actuator (MTC) GY On HVAC N/S
Driver Door Courtesy Lamp GY At Lamp N/S
Driver Door Lock Switch BK At Switch N/S
Driver Heated Seat Back GN At Seat N/S
Driver Heated Seat Cushion BK At Seat N/S
Driver Heated Seat Module C1 GY Driver Heated Seat N/S
Driver Heated Seat Module C2 GY Driver Heated Seat Back N/S
RG8W-90 CONNECTOR/GROUND LOCATIONS BUX8Wa-90-3
CONNECTOR/GROUND LOCATIONS BUX (Continued)
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REMOVAL.............................118
INSTALLATION..........................118
THROTTLE VALVE CABLE
REMOVAL.............................118
INSTALLATION..........................118
ADJUSTMENTS.........................120
TORQUE CONVERTER
DESCRIPTION..........................120
OPERATION............................123
REMOVAL.............................125
INSTALLATION..........................125
TRANSFER SYSTEM - OUTPUT SHAFT/GEAR/
BEARING
REMOVAL.............................126
INSTALLATION..........................129
ADJUSTMENTS.........................132TRANSFER SYSTEM - TRANSFER SHAFT/
GEAR/BEARING
REMOVAL.............................134
INSTALLATION..........................137
ADJUSTMENTS.........................142
VALVE BODY
REMOVAL.............................142
DISASSEMBLY..........................145
CLEANING.............................151
INSPECTION...........................152
ASSEMBLY............................152
INSTALLATION..........................155
ADJUSTMENTS.........................157
VEHICLE SPEED SENSOR/PINION GEAR
REMOVAL.............................157
INSTALLATION..........................157
AUTOMATIC - 31TH
DESCRIPTION
This transaxle combines torque converter, three
speed transmission, final drive gearing, and differen-
tial into a front wheel drive system.
Within this transaxle, there are three primary
areas:
(1) Main center line plus valve body.
(2) Transfer shaft center line (includes governor
and parking sprag).
(3) Differential center line.
Center distances between the main rotating parts
in these three areas are held precise to maintain a
low noise level.
The torque converter, transaxle area, and differen-
tial are housed in an integral aluminum die casting.
The differential oil sump is common with the
transaxle sump. Separate filling of the differen-
tial is NOT necessary.
The torque converter is attached to the crankshaft
through a flexible driving plate. Cooling of the con-
verter is accomplished by circulating the transaxle
fluid through a remote cooler. There are two types of
coolers used. An oil-to-water type cooler located in
the radiator side tank and/or an oil-to-air heat
exchanger. The torque converter assembly is a sealed
unit that cannot be disassembled.
The transaxle fluid is filtered by an internal filter
attached to the lower side of the valve body assembly.Engine torque is transmitted to the torque con-
verter and then through the input shaft to multiple-
disc clutches in the transaxle. The power flow
depends on the application of the clutches and bands.
Refer to Elements in Use Chart in Diagnosis and
Tests section.
The transaxle consists of:
²Two multiple-disc clutches
²An overrunning clutch
²Two servos
²A hydraulic accumulator
²Two bands
²Two planetary gear sets
This provides three forward ratios and a reverse
ratio. The common sun gear of the planetary gear
sets is connected to the front clutch by a driving
shell. The driving shell is splined to the sun gear and
front clutch retainer. The hydraulic system consists
of an oil pump and a single valve body which con-
tains all of the valves except the governor valves.
The transaxle sump and differential sump are both
vented through the dipstick. Output torque from the
main center line is delivered through helical gears to
the transfer shaft. This gear set is a factor in the
transaxle final drive (axle) ratio. The shaft also car-
ries the governor and parking sprag. An integral heli-
cal gear on the transfer shaft drives the differential
ring gear.
21 - 22 AUTOMATIC - 31THRS
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SPECIFICATIONS
31TH AUTOMATIC TRANSAXLE
GENERAL SPECIFICATIONS
Transaxle TypeThree speed automatic with torque converter and
integral differential
Cooling Method Air to oil heat exchanger
Lubrication Method Pump (internal-external gear-type)
GEAR RATIOS
1st Gear 2.69
2nd Gear 1.55
3rd Gear 1.00
Reverse Gear 2.10
BAND ADJUSTMENT
Kickdown (Front)ÐBacked Off From 8 N²m (72 in. lbs.) 2ò turns
Low-Reverse (Rear)ÐBacked Off From 5 N²m (41 in.
lbs.)3 Turns
BEARING SETTINGS (END PLAY & TURNING TORQUE)
Description Metric Standard
Differential Assembly 0.7-1.4 N´m 6-12 in. lbs.
Output Shaft 0-0.3 N´m 0-3 in. lbs.
Transfer Shaft 0.051-0.254 mm 0.002-0.010 in. (end play)
Overall Drag At Output Hub 0.03-1.8 N´m 3-16 in. lbs.
CLUTCH CLEARANCES
Description Metric Standard
Front Clutch (Not Adjustable) 1.27-2.79 mm 0.050-0.110 in.
Rear Clutch 0.71-1.10 mm 0.028-0.043 in.
END PLAY
Description Metric Standard
Input Shaft 0.19-1.50 mm 0.008-0.060 in.
Front Clutch Retainer 0.76-2.69 mm 0.030-0.106 in.
Front Carrier 0.89-1.45 mm 0.007-0.057 in.
Front Annulus Gear 0.09-0.50 mm 0.0035-0.020 in.
Planet Pinion 0.15-0.59 mm 0.006-0.023 in.
Reverse Drum 0.76-3.36 mm 0.030-0.132 in.
RSAUTOMATIC - 31TH21-71
AUTOMATIC - 31TH (Continued)
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SPECIFICATIONS
SPECIFICATIONS - 41TE TRANSAXLE
GENERAL SPECIFICATIONS
DESCRIPTION SPECIFICATION
Transaxle TypeFully adaptive, electronically controlled, four speed
automatic with torque converter and integral differential
Cooling Method Air-to-oil heat exchanger
Lubrication Pump (internal-external gear-type
GEAR RATIOS
DESCRIPTION SPECIFICATION
First Gear 2.84
Second Gear 1.57
Direct Gear 1.00
Overdrive Gear 0.69
Reverse Gear 2.21
BEARING SETTINGS (END PLAY & TURNING TORQUE)
DESCRIPTION METRIC STANDARD
Differential Assembly 0.6-2 N´m 5-18 in. lbs.
Output Hub 0.3-2 N´m 3-8 in. lbs.
Transfer Shaft (End Play) 0.051-0.102 mm 0.002-0.004 in.
Overall Drag At Output Hub 0.3-1.9 N´m 3-16 in. lbs.
CLUTCH CLEARANCES
DESCRIPTION METRIC STANDARD
Low/Rev Clutch (Select Reaction
Plate)0.89-1.47 mm 0.035-0.058 in.
Two/Four Clutch (No Selection) 0.76-2.64 mm 0.030-0.104 in.
Reverse Clutch (Select Snap Ring) 0.89-1.37 mm 0.035-0.054 in.
Overdrive Clutch (No Selection) 1.07-3.25 mm 0.042-0.128 in.
Underdrive Clutch (Select Pressure
Plate)0.94-1.50 mm 0.037-0.059 in.
OIL PUMP CLEARANCES
DESCRIPTION METRIC STANDARD
Outer Gear To Pocket 0.045-0.141 mm 0.0018-0.0056 in.
Outer Gear Side Clearance 0.020-0.046 mm 0.0008-0.0018 in.
Inner Gear Side Clearance 0.020-0.046 mm 0.0008-0.0018 in.
RSAUTOMATIC - 41TE21 - 225
AUTOMATIC - 41TE (Continued)
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(3) On models with the 3.3L and 3.8L engines,
loosely install the three screws and one nut that
secure the compressor to the engine (Fig. 2). Tighten
each of the fasteners using the following sequence to
54 N´m (40 ft. lbs.).
²The upper screw at the rear of the compressor.
²The lower screw at the rear of the compressor.
²The lower screw at the front of the compressor.
²The upper nut at the front of the compressor.
(4) On models with the 3.3L and 3.8L engines only,
engage the retainer on the engine wire harness com-
pressor clutch coil take out with the bracket on the
top of the compressor.
(5) Reconnect the engine wire harness connector
for the compressor clutch coil to the coil pigtail wire
connector on the top of the compressor.
(6) Reinstall the serpentine accessory drive belt
onto the front of the engine. (Refer to 7 - COOLING/
ACCESSORY DRIVE/DRIVE BELTS - 2.4L -
INSTALLATION) or (Refer to 7 - COOLING/ACCES-
SORY DRIVE/DRIVE BELTS - 3.3L/3.8L - INSTAL-
LATION).
(7) Lower the vehicle.
(8) Remove the tape or plugs from the compressor
discharge port and the discharge line fitting.
(9) Lubricate a new rubber O-ring seal with clean
refrigerant oil and install it on the discharge line fit-
ting.
(10) Reconnect the discharge line fitting to the
compressor discharge port.
(11) Install and tighten the nut that secures the
discharge line fitting to the compressor. Tighten the
nut to 23 N´m (17 ft. lbs.).
(12) Remove the tape or plugs from the compressor
suction port and the suction line fitting.(13) Lubricate a new rubber O-ring seal with clean
refrigerant oil and install it on the suction line fit-
ting.
(14) Reconnect the suction line fitting to the com-
pressor suction port.
(15) Install and tighten the nut that secures the
suction line fitting to the compressor. Tighten the nut
to 23 N´m (17 ft. lbs.).
(16) Reconnect the battery negative cable.
(17) Evacuate the refrigerant system. (Refer to 24
- HEATING & AIR CONDITIONING/PLUMBING -
FRONT/REFRIGERANT - STANDARD PROCE-
DURE - REFRIGERANT SYSTEM EVACUATE).
(18) Charge the refrigerant system. (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
FRONT/REFRIGERANT - STANDARD PROCE-
DURE - REFRIGERANT SYSTEM CHARGE).
INSTALLATION - COMPRESSOR MOUNTING
BRACKET - 2.4L ENGINE
(1) Position the compressor mounting bracket onto
the engine (Fig. 3).
(2) Install and tighten the four screws that secure
the compressor mounting bracket to the engine.
Tighten the screws to 54 N´m (40 ft. lbs.).
(3) Reinstall the compressor onto the mounting
bracket. (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING/COMPRESSOR - INSTALLA-
TION).
CONDENSER
DESCRIPTION
The condenser is integral to a cooling module
which includes the radiator, the electric cooling fan,
the fan shroud, air seals and an automatic transmis-
sion oil cooler. The cooling module is located in the
air flow in the front of the engine compartment
behind the radiator grille. The condenser cannot be
repaired or adjusted and, if faulty or damaged, it
must be replaced. The condenser may be removed
from the cooling module for service without removing
the cooling module from the vehicle.
OPERATION
The condenser is a heat exchanger that allows the
high-pressure refrigerant gas being discharged by the
compressor to give up its heat to the air passing over
the condenser fins. When the refrigerant gas gives up
its heat, it condenses. When the refrigerant leaves
the condenser, it has become a high-pressure liquid
refrigerant. The volume of air flowing over the con-
denser fins is critical to the proper cooling perfor-
mance of the air conditioning system. Therefore, it is
important that there are no objects placed in front of
Fig. 3 Compressor Mounting Bracket - 2.4L Engine
1 - MOUNTING BRACKET
2 - SCREWS (4)
3 - ENGINE
RSPLUMBING - FRONT24-67
COMPRESSOR (Continued)
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connector receptacle on the top of the expansion
valve.
(7) Remove the tape or plugs from the front liquid
line rear section and suction line fittings for the
expansion valve and both ports on the front of the
expansion valve.
(8) Lubricate new rubber O-ring seals with clean
refrigerant oil and install them on the front liquid
line rear section and suction line fittings for the
expansion valve.
(9) Reconnect the liquid line and suction line fit-
tings to the expansion valve.
(10) Install and tighten the nut that secures the
suction line and liquid line fittings to the stud on the
expansion valve. Tighten the nut to 23 N´m (17 ft.
lbs.).
(11) Remove the tape or plugs from the liquid line
rear section fitting for the filter-drier and the filter-
drier outlet port.
(12) Lubricate a new rubber O-ring seal with clean
refrigerant oil and install it on the liquid line fitting.
(13) Reconnect the liquid line fitting to the filter-
drier outlet port on the top of the filter-drier.
(14) Install and tighten the screw that secures the
liquid line fitting to the filter-drier. Tighten the screw
to 2 N´m (18 in. lbs.).
(15) Reconnect the headlamp and dash wire har-
ness connector for the A/C pressure transducer to the
transducer on the front liquid line rear section.
(16) Reconnect the drain tube to the wiper module
drain on the right side of the engine compartment.
(17) Reinstall the air cleaner housing into the
right side of the engine compartment.
(18) Reconnect the battery negative cable.
(19) Evacuate the refrigerant system. (Refer to 24
- HEATING & AIR CONDITIONING/PLUMBING -
FRONT/REFRIGERANT - STANDARD PROCE-
DURE - REFRIGERANT SYSTEM EVACUATE).
(20) Charge the refrigerant system. (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
FRONT/REFRIGERANT - STANDARD PROCE-
DURE - REFRIGERANT SYSTEM CHARGE).
HEATER CORE
DESCRIPTION
The heater core is located in the distribution hous-
ing of the heater-A/C unit, under the instrument
panel. It is a heat exchanger made of rows of tubes
and fins. One end of the core is fitted with a molded
plastic tank that includes integral heater core inlet
and outlet ports. The removable heater core tubes
are held in place these ports by a sealing plate
secured with a screw to the heater core tank. This
removable heater core tube arrangement allows theheater core to be serviced without removing the heat-
er-A/C unit housing from the vehicle. The heater core
cannot be repaired and, if faulty or damaged, it must
be replaced.
OPERATION
Engine coolant is circulated through heater hoses
to the heater core at all times. As the coolant flows
through the heater core, heat removed from the
engine is transferred to the heater core fins and
tubes. Air directed through the heater core picks up
the heat from the heater core fins. The blend air door
allows control of the heater output air temperature
by controlling how much of the air flowing through
the heater-A/C unit housing is directed through the
heater core.
REMOVAL- HEATER CORE EXTENSION TUBES
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).
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Drain the engine cooling system. (Refer to 7 -
COOLING - STANDARD PROCEDURE - COOLING
SYSTEM DRAIN).
(2) Disconnect and isolate the battery negative
cable.
(3) Disconnect the heater hoses from the heater
hose tubes. (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING - FRONT/HEATER HOSE -
REMOVAL).
(4) Remove the silencer from beneath the driver
side end of the instrument panel. (Refer to 23 -
BODY/INSTRUMENT PANEL/INSTRUMENT
PANEL SILENCER - REMOVAL).
24 - 76 PLUMBING - FRONTRS
EXPANSION VALVE (Continued)
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