Diagnosis And Testing Diagnosis And Testing - Ambient Temperature Sensor; Diagnosis And Testing - Ambient Temperature Sensor Circuit; Removal; Installation - Chrysler Dodge Caravan 2002 Manual

RS
AMBIENT TEMP SENSOR (Continued)
firmed to be OK, but the temperature display is
inoperative or incorrect, refer to Diagnosis and
Testing - Overhead Console in this group. For
complete circuit diagrams, refer to the appropriate
wiring information.
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - AMBIENT
TEMPERATURE SENSOR
(1) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Disconnect the ambient temperature sensor wire har-
ness connector.
(2) Measure the resistance of the ambient temper-
ature sensor. At –40° C (–40° F), the sensor resis-
tance is 336.6 kilohms. At 60° C (140° F), the sensor
resistance is 2.49 kilohms. The sensor resistance
should read between these two values. If OK, refer to
Diagnosis and Testing - Ambient Temperature
Sensor Circuit in this group. If not OK, replace the
faulty ambient temperature sensor.
DIAGNOSIS AND TESTING - AMBIENT
TEMPERATURE SENSOR CIRCUIT
(1) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Disconnect the ambient temperature sensor wire har-
ness connector and the Front Control Module wire
harness connector.
(2) Connect a jumper wire between the two termi-
nals in the body half of the ambient temperature sen-
sor wire harness connector.
(3) Check for continuity between the sensor return
circuit and the ambient temperature sensor signal
MESSAGE SYSTEMS
circuit cavities of the Front Control Module wire har-
ness connector. There should be continuity. If OK, go
to Step 4. If not OK, repair the open sensor return
circuit or ambient temperature sensor signal circuit
to the ambient temperature sensor as required.
(4) Remove the jumper wire from the body half of
the ambient temperature sensor wire harness con-
nector. Check for continuity between the sensor
return circuit cavity of the Front Control Module
wire harness connector and a good ground. There
should be no continuity. If OK, go to Step 5. If not
OK, repair the shorted sensor return circuit as
required.
(5) Check for continuity between the ambient tem-
perature sensor signal circuit cavity of the Front
Control Module wire harness connector and a good
ground. There should be no continuity. If OK, refer to
Diagnosis and Testing - Overhead Console in
this group. If not OK, repair the shorted ambient
temperature sensor signal circuit as required.

REMOVAL

(1) Disconnect and isolate the battery negative
cable.
(2) Raise and support vehicle on safety stands.
(3) From behind front bumper fascia, remove
screw holding sensor to radiator closure panel.
(4) Remove sensor from vehicle.

INSTALLATION

(1) Position the sensor in the vehicle.
(2) From behind the front bumper fascia, install
the screw holding sensor to radiator closure panel.
(3) Connect the battery negative cable.
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