proceeding to the next step.
5 . If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer
to the DTC Index.
Symptom Chart
Warning Lamp
Flash/Audible
Tone
DTC
Symptom
Possible Cause
Action
Unlit
N/A
No
communication
with RCM
•
Data link
connector (DLC)
fault
•
RCM supply
circuits - open
circuit, short
circuit to ground,
short circuit to
power
•
SCP circuit -
open circuit,
short circuit to
ground, short
circuit to power
Refer to the electrical
circuit diagrams and
check DLC, RCM, and
SCP circuits for short,
open circuit
Unlit
N/A
Air bag warning
lamp inoperative
•
Warning lamp
circuit - short
circuit to ground
•
Warning lamp
failure
Refer to electrical
circuit diagrams, notes
and check restraint
control module, power
circuit for fault, for
additional information,
GO to Pinpoint Test
G1043827p1.
Unlit
DTC
B2477
No
communication
with RCM
•
Module software
option content
not programmed
or incorrectly
programmed
The module can be
configured using the
new module procedure.
Check and configure as
required
DTC Index
Supplemental Restraint System
CAUTION: When probing connectors to take measurements in the course of the