Overhead Console - Chrysler 300M Service Manual

8M - 2 MESSAGE SYSTEMS
OVERHEAD CONSOLE (Continued)
Fig. 1 Overhead Console Without Universal
Transmitter
Fig. 2 Overhead Console With Universal Transmitter
Example, If the module records "TIRE PRESSURE
N/A" fault, locate the diagnostic procedure for this
code in the appropriate Body Diagnostic Procedures
Manual and follow the flow chart until the specific
problem is located and resolved. Once the problem is
thought to be corrected, erase the stored fault code
using the DRB III scan tool and verify correct sys-
tem operation. If the tire pressure monitoring system
is functioning correctly, verify that there are no other
stored codes in the module and return the vehicle to
service.
If the fault code could not be verified, such as not
finding anything wrong when following the diagnos-
tic flow chart in the Body Diagnostic Procedures
Manual. This is a good indication that a INTERMIT-
TENT problem may be present. You must than
attempt to find the intermittent problem, such as
running a tire pressure monitoring system self test.
Refer to the Tires/Wheels section for more informa-
tion. Always, eliminate all other potential problems
before attempting to replace the module.
TESTING VOLTAGE AND GROUND SUPPLY TO

OVERHEAD CONSOLE

(1) Remove the overhead console from the head-
liner (Refer to 8 - ELECTRICAL/OVERHEAD CON-
SOLE - REMOVAL) Disconnect the overhead console
electrical connector. Check the fused B(+) circuit in
the overhead console electrical connector. If OK, go to
Step 2. If not OK, repair the open circuit or compo-
nent as required. Refer to the Wiring section for
detailed schematics.
(2) Check the IGN RUN B(+) circuit in the over-
head console electrical connector. If OK, go to Step 3.
If not OK, repair the open IGN RUN B(+) circuit as
required.
(3) Check the Ground circuit in the overhead con-
sole electrical connector. If OK, go to Step 4. If not
OK, repair the open ground circuit as required.
(4) If the tire pressure monitoring system is not
operating properly, refer to the Tires/Wheels section
for more information on the tire pressure monitoring
system.
NOTE: If the compass functions, but accuracy is
suspect, it may be necessary to perform a variation
adjustment. This procedure allows the compass
unit to accommodate variations in the earth's mag-
netic field strength, based on geographic location.
Refer to Compass Variation Adjustment in the Stan-
dard Procedures section of this group.
NOTE: If the compass reading displays dashes, and
only "CAL" appears in the display, demagnetizing
may be necessary to remove excessive residual
magnetic fields from the vehicle. Refer to Compass
Demagnetizing in the Standard Procedures section
of this group.
STANDARD PROCEDURE
STANDARD PROCEDURE - MODULE LAMP
REPLACEMENT
(1) Remove the overhead console (Refer to 8 -
ELECTRICAL/OVERHEAD CONSOLE - REMOV-
AL).
(2) Using a flat blade screwdriver twist out socket/
lamp (Fig. 3).
(3) Replace lamp(s) as necessary.
LH