Chrysler Pacifica. Manual - part 474
(5) Snap cover into place.
(6) Connect battery negative cable.
REMOTE SWITCHES
DESCRIPTION
Two rocker-type switches (if equipped) are mounted
on the back (instrument panel side) of the steering
wheel spokes. The switch on the left spoke is the
seek switch and has seek up, seek down, and preset
station advance functions. The switch on the right
spoke is the volume control switch and has volume
up, and volume down functions. The switch on the
right spoke also includes a “mode” control that allows
the driver to sequentially select AM radio, FM radio,
cassette
player,
CD
player
or
CD
changer
(if
equipped).
OPERATION
These switches are resistor multiplexed units that
are hard-wired to the Body Control Module (BCM)
through the clockspring. The BCM sends the proper
messages on the Programmable Communications
Interface (PCI) data bus network to the radio
receiver. For diagnosis of the BCM or the PCI data
bus, the use of a DRB III
t scan tool and the proper
Diagnostic Procedures manual are recommended. For
more information on the operation of the remote
radio switch controls, refer to the owner’s manual in
the vehicle glove box.
DIAGNOSIS AND TESTING - REMOTE
SWITCHES
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,
REFER
TO
ELECTRICAL,
RESTRAINTS
BEFORE ATTEMPTING ANY STEERING WHEEL,
STEERING
COLUMN,
OR
INSTRUMENT
PANEL
COMPONENT DIAGNOSIS OR SERVICE. FAILURE
TO TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
Any diagnosis of the Audio system should
begin with the use of the DRB III
t diagnostic
tool. For information on the use of the DRB
III
t, refer to the appropriate Diagnostic Service
Manual.
For complete circuit diagrams, refer to the appro-
priate wiring information.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the remote radio switch(es) from the
steering wheel. (Refer to 8 - ELECTRICAL/AUDIO/
REMOTE SWITCHES - REMOVAL).
(3) Use an ohmmeter to check the switch resis-
tance as shown in the Remote Radio Switch Test
table (Fig. 13).
REMOTE RADIO SWITCH TEST
Switch
Switch Position
Resistance
Right
(White)
Volume Up
1.210 Kilohms
Right
(White)
Volume Down
3.010 Kilohms
Right
(White)
Mode Advance
0.0511 Kilohms
Left
(Black)
Seek Up
0.261 Kilohms
Left
(Black)
Seek Down
0.681 Kilohms
Left
(Black)
Pre-Set Station
Advance
0.162 Kilohms
NOTE: The right remote radio switch back is white
in color. The left switch back is black in color. The
right/left remote radio switch orientation is with the
steering wheel installed, and driver in drivers seat.
(4) If the switch resistance checks OK, go to Step
5. If not OK, replace the faulty switch.
(5) Check for continuity between the ground cir-
cuit cavity of the switch wire harness connector and
a good ground. There should be continuity. If OK, go
to Step 6. If not OK, repair the open circuit as
required.
(6) Unplug the 24-way white wire harness connec-
tor from the Body Control Module (BCM). Check for
continuity between the radio control circuit cavity of
the remote radio switch wire harness connector and a
good ground. There should be no continuity. If OK, go
Fig. 13
CS
AUDIO/VIDEO
8A - 15
RECEIVER-SATELLITE (Continued)