Chrysler PT Cruiser Service & Repair Manual page 461

PT
OVERHEAD CONSOLE (Continued)
(2) Grasp the front of the overhead console and
pull downward to disconnect the front retaining clips.
(3) Slide the overhead console forward to disen-
gage the rear tabs from the headliner.
(4) Disconnect the overhead console wire connec-
tor.
(5) Unsnap compass module from inner roof panel.
Push module all the way forward to disengage the
front retaining clip. Once the front clip is discon-
nected, push the module all the way rearward to dis-
engage the rear retaining clip.
(6) Remove console from vehicle.
INSTALLATION
(1) Position overhead console into vehicle and snap
compass module onto inner roof panel.
(2) Connect overhead console wire harness connec-
tor.
(3) Engage the rear tabs on the overhead console
into the headliner.
(4) Align the front retaining clips of the overhead
console with the corresponding holes in the inner roof
panel and firmly snap into place.
(5) Connect the battery negative cable.
(6) Calibrate compass (Refer to 8 - ELECTRICAL/
OVERHEAD CONSOLE - STANDARD PROCE-
DURE).
SPECIAL TOOLS
OVERHEAD CONSOLE
Degaussing Tool 6029
AMBIENT TEMP SENSOR
DESCRIPTION
Ambient air temperature is monitored by the com-
pass/temperature display unit. It receives a hard
wired input from the ambient temperature sensor.
The ambient temperature sensor is a variable resis-
tor mounted to a bracket that is secured with a nut
to the bracket in front of the A/C condenser, behind
the radiator grille.
The ambient temperature
adjusted or repaired and, if faulty or damaged, it
must be replaced.
sensor cannot be
MESSAGE SYSTEMS
OPERATION
The ambient temperature sensor is a variable
resistor that operates on a five-volt reference signal.
The resistance in the sensor changes as temperature
changes, changing the temperature sensor signal cir-
cuit voltage to compass/temperature display unit.
Based upon the resistance in the sensor, the com-
pass/temperature display unit senses a specific volt-
age on the temperature sensor signal circuit, which it
is programmed to correspond to a specific tempera-
ture. The compass/temperature display unit then dis-
plays the proper ambient temperature.
DIAGNOSIS AND TESTING - AMBIENT
TEMPERATURE SENSOR
The thermometer function is supported by the
ambient temperature sensor, a wiring circuit, and the
compass/temperature display unit.
If the display shows OC (-49° F (-45° C) or SC
(140° F (60° C),, there is an OPEN or SHORT CIR-
CUIT and it must be repaired before the VFD can be
tested.
The ambient temperature sensor circuit can also be
diagnosed using the following Sensor Test, and Sen-
sor Circuit Test. If the temperature sensor and cir-
cuit are confirmed to be OK, but the temperature
display is inoperative or incorrect, replace the com-
pass/temperature display.
SENSOR TESTING
(1) Turn the ignition switch to the OFF position.
Disconnect and isolate the battery negative cable
(Fig. 5). Disconnect the ambient temperature sensor
wire harness connector.
Fig. 5 Battery Negative Cable Remove/Install
(2) Measure the resistance of the ambient temper-
ature sensor. At room temperature (approx. 68°F),
8M - 5