Ford 2003 Mustang Workshop Manual page 4065

N1 CHECK FOR A HARD OR INTERMITTENT DTC
Key in OFF position.
Connect the diagnostic tool. Scan Tool
Key in ON position.
Enter the following diagnostic mode on the diagnostic tool:
Retrieve/Clear Continuous DTCs.
Retrieve and record any continuous DTCs for use later in this
pinpoint test.
Enter the following diagnostic mode on the diagnostic tool: On-
Demand Self Test.
Was DTC B1869 retrieved during the on-demand self test?
N2 CHECK THE RCM
WARNING: If the supplemental restraint system (SRS) is
being serviced, the system must be deactivated and restraint
system diagnostic tools must be installed. Refer to
Supplemental Restraint System (SRS)
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.
Disconnect: RCM C2041.
Measure the resistance between RCM C2041 pin 20, component
side and a known good chassis ground.
Test Step
in this section.
Air Bag Supplemental Restraint
Result / Action to
Take
Yes
This is a hard fault.
The fault condition
is still present. This
fault cannot be
cleared until it is
corrected and the
DTC is no longer
retrieved during
the on-demand
self test. GO to
N2 .
No
This is an
intermittent fault.
The fault
conditions not
present at this
time. GO to
Yes
INSTALL a new
RCM. GO to
Air Bag
No
GO to N3
N5 .
N6 .
.