Ford 2003 Mustang Workshop Manual page 4023

SECTION 501-20B: Supplemental Restraint System
DIAGNOSIS AND TESTING
Diagnostic Instructions — Air Bag Supplemental Restraint
System (SRS)
Special Tool(s)
Worldwide Diagnostic System
(WDS)
418-F224,
New Generation STAR (NGS)
Tester
418-F052, or equivalent scan
tool
The symptom chart can be used to help locate the air bag supplemental restraint system (SRS)
concerns if no diagnostic trouble codes (DTCs) are retrieved and the listed symptoms are observed.
Whether or not the listed symptoms are observed, always perform the following.
1. Retrieve all DTCs stored in the restraints control module (RCM) memory. Refer to
Retrieve/Clear Continuous DTCs in this section.
2. Run the On-Demand Self Test to determine what DTCs are currently being sensed by the
restraints control module (RCM) (14B321). Refer to On-Demand Self Test in this section.
3. If the stored DTCs are different than the current DTCs, always repair the current DTCs first.
4. If memory displays different continuous DTCs than the On-Demand Self-Test, perform in the
following order:
On-Demand Self-Test.
Memory (Retrieve/Clear Continuous DTCs).
A DTC can indicate several concerns. The DTCs are to assist in system diagnosis and are not to be
considered definitive. Always refer to the pinpoint test corresponding to the DTC to determine where
the concern lies and to repair the concern correctly.
The SRS diagnostics can be divided into three sections.
Diagnostic test modes
PID/data monitor and record
Active command modes
Diagnostic Test Modes
Two menu options are available under the diagnostic test modes.
Retrieve/Clear Continuous DTCs.
On-Demand Self Test.
2003 Mustang Workshop Manual