Chrysler 300M 2002 Service Manual page 1867

COMMUNICATION
Symptom:
*BUS +/- SIGNALS OPEN OR NO RESPONSE FROM MEMORY
HEATED SEAT/MIRROR MODULE
ATTEMPT TO COMMUNICATE WITH THE BCM
FUSED B+ CIRCUIT OPEN
GROUND CIRCUIT OPEN
MEMORY HEATED SEAT/MIRROR MODULE
PCI BUS CIRCUIT OPEN
BODY CONTROL MODULE
TEST
1 Turn the ignition on.
With the DRB, enter Body then Body Computer.
Was the DRB able to I/D or communicate with the BCM?
Yes → Go To 2
No
2 Turn the ignition off.
Disconnect the Memory Heated Seat/Mirror Module C4 harness connector.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit.
Is the test light illuminated?
Yes → Go To 3
No
3 Turn the ignition off.
Disconnect the Memory Heated Seat/Mirror Module C4 harness connector.
Using a 12-volt test light connected to 12-volts, probe the ground circuit.
Is the test light illuminated?
Yes → Go To 4
No
POSSIBLE CAUSES
ACTION
→ Refer to the symptom list for problems related to no communica-
tion with the BCM.
Perform BODY VERIFICATION TEST - VER 1.
→ Check Circuit Breaker #2 in the Junction Block for an open. If ok,
repair the Fused B+ circuit for an open or short. Refer to the
wiring diagrams in the service information.
Perform BODY VERIFICATION TEST - VER 1.
→ Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
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APPLICABILITY
All
All
All