Chrysler 300M 2002 Service Manual page 229

8A - 10 AUDIO
REMOTE SWITCHES (Continued)
WARNING: DISABLE
BEFORE ATTEMPTING ANY STEERING WHEEL,
STEERING COLUMN, SEAT BELT TENSIONER, SIDE
AIRBAG, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Disconnect and isolate the battery negative
cable. Remove the remote radio switch(es) (Fig. 8)
from the steering wheel.
Fig. 8 REMOTE RADIO SWITCHES
1 - BLACK (LEFT) SWITCH
2 - WHITE (RIGHT) SWITCH
(2) Use an ohmmeter to check the switch resis-
tances as shown in the Remote Radio Switch Test
table. If the remote radio switch resistances check
OK, go to Step 3. If not OK, replace the faulty
switch.
THE AIRBAG SYSTEM REMOTE RADIO SWITCH TEST
Switch Switch Position
Right
Volume Up
(White)
Right
Volume Down
(White)
Right
Mode Advance
(White)
Left
Seek Up
(Black)
Left
Seek Down
(Black)
Left Pre-Set Station
(Black) Advance
(3) Reconnect the battery negative cable. Turn the
ignition switch to the ON position. Check for 5 volts
at the radio control mux circuit cavities of the steer-
ing wheel wire harness connectors for both remote
radio switches. If OK, go to Step 4. If not OK, repair
the open or shorted radio control mux circuit to the
Body Control Module (BCM) as required.
(4) Disconnect and isolate the battery negative
cable. Disconnect the 22-way instrument panel wire
harness connector from the BCM. Check for continu-
ity between the remote radio switch ground circuit
cavities of the steering wheel wire harness connec-
tors for both remote radio switches and a good
ground. There should be no continuity. If OK, go to
Step 5. If not OK, repair the shorted remote radio
switch ground circuit to the BCM as required.
(5) Check for continuity between the remote radio
switch ground circuit cavities of the steering wheel
wire harness connectors for both remote radio
switches and the 22-way instrument panel wire har-
ness connector for the BCM. There should be conti-
nuity. If OK, refer to the proper Body Diagnostic
Procedures manual to test the BCM and the PCI
data bus. If not OK, repair the open remote radio
switch ground circuit as required.
LH
Resistance
1.210 Kilohms
3.010 Kilohms
0.0511 Kilohms
0.261 Kilohms
0.681 Kilohms
0.162 Kilohms