Ford 2003 Mustang Workshop Manual page 4063

Key in OFF position.
Deactivate the system. Refer to
System (SRS) in the Diagnosis and Testing portion of this section.
Key in OFF position.
Disconnect: RCM C2041.
Disconnect: GEM C201e.
Key in ON position.
Measure the voltage between RCM C2041 pin 26, circuit 1083
(LB/BK), harness side and ground.
Is the voltage less than 0.2 volt?
M3 CHECK THE AIR BAG TONE WARNING INDICATOR
Key in OFF position.
Connect: GEM C201e.
Key in ON position.
Jumper RCM C2041 pin 26, circuit 1083 (LB/BK), harness side to
ground.
Does the GEM generate a tone?
M4 CHECK FOR AN INTERMITTENT FAULT
Refer to continuous DTCs recorded during Step M1.
Was the continuous DTC retrieved during step M1 an
intermittent fault?
Air Bag Supplemental Restraint
Yes
INSTALL a new
RCM. GO to M5 .
No
INSTALL a new
GEM. GO to M5 .
Yes
Check for causes
of intermittent
short to ground or
open on circuit
1083 (LB/BK).
Attempt to recreate
the hard fault by
flexing the wire
harness and
cycling the ignition
key frequently.
REPAIR any
intermittent
concerns found.
GO to M5 .
No
GO to M5 .