Chrysler 300M 2002 Service Manual page 2447

COMMUNICATION
Symptom:
*BUS +/- SIGNALS OPEN FROM SENTRY KEY IMMOBILIZER MOD-
ULE
ATTEMPT TO COMMUNICATE WITH THE BCM
GROUND CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
FUSED B(+) CIRCUIT OPEN
SENTRY KEY IMMOBILIZER MODULE (SKIM)
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
→ Refer to the symptom list for problems related to no communica-
No
2 Turn the ignition off.
Disconnect the SKIM harness connector.
Using a 12-volt test light connected to 12-volts, probe the ground circuit.
Is the test light illuminated?
Yes → Go To 3
→ Repair the Ground circuit for an open.
No
3 Turn the ignition off.
Disconnect the SKIM harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Fused Ignition Switch
Output circuit.
Is the test light illuminated?
Yes → Go To 4
→ Repair the Fused Ignition Switch Output circuit for an open.
No
4 Turn the ignition off.
Disconnect the SKIM harness connector.
Using a 12-volt test light connected to ground, probe the Fused B(+) circuit.
Is the test light illuminated?
Yes → Go To 5
→ Repair the Fused B+ circuit for an open. Refer to the wiring
No
POSSIBLE CAUSES
ACTION
tion with the BCM.
Refer to the wiring diagrams in the service information.
diagrams in the service information.
18
APPLICABILITY
All
All
All
All