O-ring replacement is required whenever the pres-
sure transducer is serviced. Be sure to use the O-ring
specified for this vehicle.
The A/C pressure transducer is screwed on to a
valve on the discharge line. The transducer can be
removed or installed without evacuating the refriger-
ant from the A/C system.
NOTE: For 3.2/3.5L applications, the passenger
side headlamp must be rotated out of the way to
access the A/C pressure transducer.
REMOVAL
(1) Open hood and disconnect the negative battery
cable remote terminal from the remote battery post
(Fig. 13).
(2) Disconnect the wire harness connector from the
A/C pressure transducer.
CAUTION: A slight release of pressure trapped in
the fitting may be experienced. It is not necessary
to discharge the refrigerant system.
(3) Remove the transducer with a counterclockwise
rotation using a 14 mm open-end wrench.
INSTALLATION
For installation, reverse the above procedures.
Tighten pressure transducer to 6 N·m (50 in. lbs.).
AMBIENT TEMPERATURE SENSOR
The ambient air temperature sensor is located on
the inside of the right front bumper beam (Fig. 14).
This sensor will inform the ATC system of the ambi-
ent temperature outside the vehicle. This sensor is
used by the ATC system to adjust blower speed, tem-
perature offsets, evaporator temperatures and mode
control.
The ambient sensor is not serviceable and must be
replaced if found to be defective.
The ambient temperature sensor is used on all LH
vehicles with or without ATC systems.
To test Ambient Temperature Sensor, refer to
proper LH Body Diagnostic Manual.
REMOVAL
(1) Remove sensor mounting screw.
(2) Disconnect sensor wiring connector.
INSTALLATION
For installation, reverse the above procedures.
ATC IN-CAR TEMPERATURE SENSOR
The ATC In-Car Temperature Sensor is located in
the Control Head. The Control Head must be
removed for service to the sensor.
REMOVAL
(1) Open hood and disconnect the negative battery
cable remote terminal from the remote battery post
(Fig. 13).
(2) Remove snap-on center bezel which holds the
ATC Control.
(3) Disconnect the ATC Control from the vehicle
wiring harness.
Fig. 13 Negative Battery Cable Remote Terminal
1 – RIGHT STRUT TOWER
2 – AIR CLEANER INLET TUBE
3 – REMOTE TERMINAL
Fig. 14 Ambient Temperature Sensor Location
1 – AMBIENT TEMPERATURE SENSOR
2 – FRONT FASCIA
3 – POWER STEERING COOLER
LH HEATING AND AIR CONDITIONING 24 - 17
REMOVAL AND INSTALLATION (Continued)
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