Ford 2003 Mustang Workshop Manual page 4057

The air bag restraint system diagnostic tools must be removed
and the air bag modules reconnected when the system is
reactivated to avoid non-deployment in a collision, resulting in
possible personal injury. NOTE: Diagnostics or repairs are not to
be performed on a seat equipped with a seat side air bag with the
seat in the vehicle. Prior to attempting to diagnose or repair a seat
concern when equipped with a seat side air bag, the seat must be
removed from the vehicle and the restraint system diagnostic tools
must be installed in the seat side air bag electrical connectors. The
restraint system diagnostic tools must be removed prior to
operating the vehicle over the road. NOTE: After diagnosing or
repairing an SRS, the restraint system diagnostic tools must be
removed before operating the vehicle over the road. NOTE: After
diagnosing or repairing a seat system, the restraint system
diagnostic tools must be removed before operating the vehicle
over the road. NOTE: The SRS must be fully operational and free of
faults before releasing the vehicle to the customer.
Key in OFF position.
Deactivate the system. Refer to
System (SRS) in the Diagnosis and Testing portion of this section.
Key in OFF position.
Key in ON position.
Enter the following diagnostic mode on the diagnostic tool: On-
Demand Self Test.
Was DTC B1935 retrieved?
K3 CHECK THE PASSENGER AIR BAG MODULE CIRCUIT
Key in OFF position.
Disconnect: Passenger Air Bag Restraint System Diagnostic Tool.
Measure the resistance between passenger air bag C256, circuit 607
(LB/OG), harness side and passenger air bag C256, circuit 616
(PK/BK), harness side.
Is the resistance greater than 10,000 ohm?
K4 CHECK FOR AN INTERMITTENT FAULT
Refer to the continuous DTCs recorded during Step K1.
Was the continuous DTC retrieved during Step K1 an
intermittent fault?
Air Bag Supplemental Restraint
passenger air bag
module. GO to K5 .
Yes
INSTALL a new
RCM. GO to K5 .
No
REPAIR the circuit
(s) as necessary.
GO to K5 .
Yes
CHECK for causes
of intermittent low
resistance on
circuit 607 (LB/OG)
and circuit 616
(PK/BK). Attempt
to recreate the
hard fault by
flexing the wire
harness and
cycling the ignition
key frequently.
REPAIR any
intermittent