Symptom:
*NO RESPONSE FROM RADIO
POSSIBLE CAUSES
NO RESPONSE FROM RADIO
OPEN FUSED IGNITION SWITCH OUTPUT CIRCUIT
OPEN FUSED B+ CIRCUIT
RADIO GROUND CIRCUIT OPEN
OPEN PCI BUS CIRCUIT
RADIO
TEST ACTION APPLICABILITY
1 Turn the ignition on.
Note: As soon as one or more module communicates with the DRB, answer
the question.
With the DRB, attempt to communicate with the Airbag Control Module.
With the DRB, attempt to communicate with the Instrument Cluster.
Was the DRB able to I/D or establish communications with either of the modules?
All
Yes → Go To 2
No → Refer to the Communications category and perform the symptom
PCI Bus Communication Failure.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
Disconnect the Radio 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?
All
Yes → Go To 3
No → Repair the Fused Ignition Switch Output circuit for an open or
short. Refer to the wiring diagrams located in the Service Infor-
mation.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Disconnect the Radio harness connector.
Using a 12-volt test light connected to ground, probe both Fused B+ circuits.
Is the test light illuminated for both circuits?
All
Yes → Go To 4
No → Repair the Fused B+ circuit for an open or short. Refer to the
wiring diagrams located in the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
290
COMMUNICATION
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