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FUSE/
RELAY
BOX
AIR CONDITIONER: COMPRESSOR CONTROL: 3.2L
EB-20
(COND.
FAN)
30A
FUSE/
RELAY
BOX
C-9
Connector
3
C-9
Connector
2
A/C
TRIPLE
PRESSURE
SWITCH
X-11
CONDENSER
FAN
RELAY
X-11
P-6/C-36
M
1
CONDENSER
FAN
2
See Ground
Distribution,
pages 14-4
and 14-5.
PNK/WHT
BLK
BLU
BLU/ORN
BLK
C-24
Connector
C-24
Connector
BLU/GRN
BLU/BLK
GRN/BLK
Automatic Transmission
BLK
BLK
HOT AT ALL TIMES
Air
Delivery
Door
Control
FACE
BI-LEVEL
FOOT
FOOT/
DEFROST
DEFROST
HEATER-A/C
CONTROL
PANEL
DIODE
Air
Selector
Knob
GRN/BLK
BLU
2
I-33
Connector
BRN
6
I-33
Connector
WHT
1
2
5
3
4
63-3
63-4
(Refer to Section 201 for photographs.)
Component
Photo No.
A/C Compressor
Lower left front corner of engine
8
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A/C Compressor Relay
Right side of engine compartment, in fuse/relay box
15
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
A/C Dual Pressure Switch
Behind left side of radiator grille
4
. . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A/C Pressure Switch
Behind left side of radiator grille
4
. . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A/C Triple Pressure Switch
Behind left side of radiator grille
4
. . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condenser Fan
Behind center of radiator grille
28
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condenser Fan Hi Relay
Right side of engine compartment, in option box
128
. . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Condenser Fan Lo Relay
Right side of engine compartment, in fuse/relay box
16
. . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
Condenser Fan Relay
Right side of engine compartment, in fuse/relay box
19
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
Electronic Thermostat
Right side of I/P, behind glove box
138
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine or Powertrain
Control Module
(ECM or PCM) (2.2L)
Below center of I/P
73
. . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Control Module
(ECM) (3.2L)
Left side of engine compartment
44
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse/Relay Box
Right side of engine compartment, on inner fender panel
14
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . .
Option Box
Right side of engine compartment, on inner fender panel
127
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
Thermo Switch Relay
Right side of engine compartment, in fuse/relay box
16
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
Connector
C-24 (2-GRY)
Left front of engine compartment, behind grille
28
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-35 (4-GRY)
Left front of engine compartment, on fan shroud
5
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E-3 (1-BLK)
Left side of engine compartment
8
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-4 (52-GRY)
Left side of engine compartment
27
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-6 (16-BLU)
Left side of engine compartment, below brake fluid reservoir
11
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
H-13 (16 or 20-WHT)
Below right side of I/P, behind kick panel
82
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-14 (19-BLK)
Below right side of I/P, behind kick panel
82
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I-33 (8-WHT)
Behind center of I/P, behind heater and A/C control assembly
126
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . .
Ground
B-7
Below center console
81
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-36
Right side of engine compartment, behind battery
13
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
P-6
Right side of engine compartment, behind battery
13
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
Component Location Index
AIR CONDITIONER: COMPRESSOR CONTROL
63-5
AIR CONDITIONER: COMPRESSOR CONTROL
Circuit Operation
A/C Compressor Clutch (2.2L)
With the engine starter switch in ON, the A/C compres-
sor clutch relay is energized by the engine control mod-
ule (ECM). The ECM determines when to activate the
compressor clutch based on the information received
from the A/C pressure switch.
Electronic Thermostat
The electronic thermostat senses the temperature of
cool air from the evaporator by means of the evaporator
temperature sensor. This information determines
whether the thermostat will provide ground to the ther-
mo switch relay. When the temperature becomes too
low, ground is not provided.
OFF: Below 1.0
"
0.5
_
C (33.8
"
0.9
_
F)
ON:
Above 3.5
"
0.3
_
C (38.3
"
0.9
_
F)
A/C Compressor Clutch (3.2L)
With the engine running, battery voltage is applied to
the A/C switch, the A/C triple pressure switch (A/T) or
A/C dual pressure switch (M/T), the coil of the A/C com-
pressor relay and the air selector knob. When you
press the A/C switch, battery voltage is applied to the
electronic thermostat. The solid-state switch in the
electronic thermostat closes, providing a path to
ground for the thermo switch relay, with the fan control
switch in any position except OFF. Voltage is also ap-
plied through the A/C triple pressure switch (A/T) or the
A/C dual pressure switch (M/T) to the coil of the thermo
switch relay. This closes the thermo switch relay con-
tacts, applying battery voltage to the A/C ON input of
the engine or powertrain control module (ECM or
PCM). The ECM or PCM then provides ground for the
A/C compressor relay. The A/C compressor relay con-
tacts close, applying battery voltage to the compressor
clutch. If the A/C triple pressure switch (A/T)/dual pres-
sure switch (M/T) opens, the compressor clutch disen-
gages.
A/C Dual Pressure Switch (M/T)
To prevent compressor damage, the dual pressure
switch will open if system pressure is too low or too
high: below 176.5
"
19.6 kPa (25.6
"
2.8 psi) or above
2943
"
196.2 kPa (426.7
"
28.4 psi).
A/C Triple Pressure Switch (A/T)
Low and high switch operation is the same as the dual
pressure switch. The medium pressure switch will close
when system pressure exceeds 1471.5
"
98.1 kPa
(213.3
"
14.2 psi), turning on the condenser fan.
Condenser Fan (3.2L)
With the engine running, battery voltage is applied to
the A/C switch. When the A/C switch is pressed, bat-
tery voltage is then applied through the A/C triple pres-
sure switch (A/T only) to the coil side of the condenser
fan relay, which is continually grounded. Once the relay
is energized, the contacts close, allowing battery volt-
age from the (COND. FAN) fuse EB-20 to be applied to
the condenser fan. The motor, being grounded continu-
ally, is energized, and the fan is activated.
Condenser Fan (2.2L)
The engine control module (ECM) receives refrigerant
information from the A/C pressure switch, and then
controls the condenser fan LO and HI relays in order to
energize the condenser fan and control its speed.
AIR DELIVERY DOOR CONTROL
Fuse/Relay Box
Heater-A/C Control Panel
Intake Actuator
Intake Actuator Relay
Component Index
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