Ford 2003 Mustang Workshop Manual page 2381

105-R0057 or equivalent
UV Leak Detector Kit
164-R0756 or equivalent
The Diagnosis by Symptom charts give the technician diagnostic information, direction, and suggest
possible components, using a symptom as a starting point.
The Diagnosis by Symptom charts are divided into two categories: Electrical Routines, indicated by
200 series numbers, and Hydraulic/Mechanical Routines, indicated by 300 series numbers. The
Electrical Routines list the possible electrical components that could cause or contribute to the
symptom described. The Hydraulic/Mechanical Routines list the possible hydraulic or mechanical
components that could cause or contribute to the symptom described.
Diagnosis by Symptom Chart Directions
1. Using the Diagnosis by Symptom Index, select the Concern/Symptom that best describes the
condition.
2. Refer to the routine indicated in the Diagnosis by Symptom Index.
3. Always begin diagnosis of a symptom with:
a. preliminary inspections.
b. verifications of condition.
c. checking the fluid levels.
d. carrying out other test procedures as directed.
4. NOTE: Not all concerns and conditions with electrical components will set a diagnostic trouble
code (DTC). Be aware that the components listed may still be the cause. Verify correct function
of these components prior to proceeding to the Hydraulic/Mechanical Routine listed.
Begin with the Electrical Routine, if indicated. Follow the reference or action required
statements. Always carry out the on-board diagnostic tests as required. Never skip steps.
Repair as required. If the concern is still present after electrical diagnosis, then proceed to the
Hydraulic/Mechanical Routine listed.
5. The Hydraulic/Mechanical Routines list possible hydraulic or mechanical components that could
cause the concern. These components are listed in the removal sequence and by most
probable cause. All components listed must be inspected to ensure correct repair.
Diagnosis by Symptom Index
Title
Routines
Electrical
Hydraulic/
a
Mechanical