Dodge 2004 Neon SX2 Diagnostic Manual page 14

SETTING COMPASS ZONE
The compass has a default zone of 8. Refer to the
Zone Variance Map to determine the correct zone
number. The correct compass Zone selection is crit-
ical to proper compass operation. With the ignition
in the ON position, pressing the Zone/Cal button
(left reading lamp button) for 5-10 seconds and then
releasing while ZONE is illuminated enters the
compass into the Zone display mode. In the Zone
display mode, ZONE will be illuminated instead of
the temperature. The current Zone number, 1
through 15 will be displayed. While ZONE is illu-
minated; momentarily pressing the Zone/Cal but-
ton advances the zone to the next higher zone.
When the desired zone number is displayed, do not
press the Zone/Cal button again. After 5 seconds,
the Zone Variance number will be stored in the
module memory.
FIRST TIME CALIBRATION
A new Compass/Temp Mirror is shipped in a first
time calibration mode. CAL is illuminated when the
Compass/Temp Mirror is first powered up. The first
time calibration mode can not be exited until the
first time calibration process is completed. The CAL
icon will remain illuminated to alert the driver that
the Compass/Temp Mirror is operating in the CAL
mode. Move the vehicle to an area away from large
metallic objects or overhead power lines. While CAL
is illuminated in the display the vehicle must be
driven in 3 complete 360 degree circles at less than
5 MPH (8 KPH). The compass will calibrate; CAL
will turn off, and then resume normal operation.
MANUAL CALIBRATION
With the ignition in the ON position, pressing
and holding the Zone/Cal button (left reading lamp
button) for 10-15 seconds will toggle the display to
CAL. Releasing the button within the 10-15 second
duration will enter the compass into the calibration
mode. CAL will remain illuminated until the cali-
bration is complete or is toggled off by pressing the
Zone/Cal button. Move the vehicle to an area away
from large metallic objects or overhead power lines.
While CAL is illuminated in the display the vehicle
must be driven in 3 complete 360 degree circles at
less than 5 MPH (8 KPH). The compass will cali-
brate; CAL will turn off, and then resume normal
operation.
CONTINUOUS CALIBRATION
During normal operation, the Compass/Temp
Mirror will continuously update the compass cali-
bration to adjust for gradual changes in the vehi-
cle's magnetic remnant field. If the vehicle is sub-
jected to high magnetic influences, the compass
may appear to indicate false headings or appear
unable to be calibrated. If this occurs the vehicle
GENERAL INFORMATION
may need to be demagnetized. Refer to Demagne-
tizing Procedure in the Service Manual.
SELF- CHECK DIAGNOSTICS
With the ignition ON, the Compass/Temp Mirror
can perform a diagnostic self- check by pressing and
holding the Zone/Cal button (left reading lamp
button) for 20-25 seconds. The internal diagnostics
will sequence the following five tests:
1) VF segment display- Illuminates the segment
patterns one at a time for 1 second each as
follows: CAL; ZONE; N; NE; E; SE; S; SW; W;
NW; 0 through 9; C°; F°
2) CTM memory- ROM Checksum
3) CTM memory- RAM
4) CTM memory- EEPROM
5) Compass Test
During the self- check, if any of the internal tests
fail, the Compass/Temp Mirror will display an ''F''
and the number of the test that failed. If more than
one test fails ''FO'' will be displayed. P- Pass or F-
Fail will be displayed until the Zone/Cal button (left
reading lamp button) is pressed and released or the
ignition is cycled. If all of the tests pass, the
Compass/Temp Mirror will display ''P''. A VF seg-
ment that fails to illuminate will not cause the
Compass/Temp Mirror to display an ''F''. If any
segment fails to illuminate or the Compass/Temp
Mirror displays ''F'', the Compass/Temp Mirror
must be replaced.
To exit self- check diagnostics, press and release
the Zone/Cal button or cycle the ignition to return to
normal compass/temp operation.
OUTSIDE TEMPERATURE
The Compass/Temp Mirror utilizes vehicle speed
and engine temperature data received on the PCI
Bus to accurately display the outside temperature
to avoid ''hot soak'' condition readings. The dis-
played outside temperature information is stored
within the memory of the compass/temp mirror.
When the Compass/Temp Mirror is first powered
up, it retrieves the temperature data from the
module memory. The memory temperature is com-
pared with the temperature received from the am-
bient temperature sensor. The colder of the two
temperatures is displayed.
TEMPERATURE UPDATE - WARM
On power up, when the outside temperature
sensed by the ambient temperature sensor is
warmer than the temperature stored in the module
memory, the Compass/Temp Mirror will update the
displayed temperature in relation to vehicle speed
and engine temperature data received on the PCI
Bus.
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