Ford 2003 Mustang Workshop Manual page 4064

M5 CHECK FOR ADDITIONAL DTCs
Refer to the continuous DTCs recorded during Step M1.
Were any continuous DTCs retrieved during Step M1?
Pinpoint Test N: DTC B1869 — Air Bag Indicator Inoperative
Normal Operation
The air bag indicator is designed to illuminate for 6 (+/-2) seconds when the ignition switch is turned to
the RUN position. This initial 6 seconds of illumination is considered normal operation and is called
proveout of the air bag indicator. The air bag indicator is then used to warn the driver that there is a
fault in the air bag supplemental restraint system (SRS).
The restraints control module (RCM) monitors the air bag indicator for open and short to ground
conditions. If the RCM detects an open or short to ground condition on the air bag indicator circuit, it
will store a diagnostic trouble code (DTC) B1869 in memory.
If the RCM detects an air bag indicator failure in addition to another SRS failure, the RCM will send a
signal to the generic electronic module (GEM) to produce five sets of five tone bursts.
Possible Causes
An air bag indicator inoperative condition can be caused by:
a damaged wiring on circuit 608 (BK/YE).
a damaged or burned out air bag indicator.
worn or damaged instrument cluster.
an RCM internal concern.
PINPOINT TEST N: DTC B1869 — AIR BAG INDICATOR
INOPERATIVE
Yes
Do not clear any
DTCs until all
DTCs have been
resolved. GO to
the Restraints
Control Module
(RCM) Diagnostic
Trouble Code
(DTC) Priority
Table in this
section for pinpoint
test direction.
No
RECONNECT the
system.
REACTIVATE the
system. PROVE
OUT the system.
REFER to Air Bag
Supplemental
Restraint System
(SRS) in this
section. CLEAR all
DTCs.