Ford 2003 Mustang Workshop Manual page 3107

The system performance is acceptable when the recorded time falls between the upper
and lower limits shown.
9. Determine the total A/C clutch cycle time.
1. Record the ambient temperature.
2. Record the time the A/C clutch is engaged plus the time it is disengaged (time ON plus
time OFF).
3. NOTE: When the ambient temperature is above 26°C (80°F), the A/C clutch may not
cycle.
The system performance is acceptable when the recorded time falls between the upper
and lower limits shown.
10. Determine the A/C clutch cycle rate per minute.
1. Record the ambient temperature.
2. Record the number of A/C clutch cycles occurring in one minute.
3. NOTE: When the ambient temperature is above 26°C (80°F), the A/C clutch may not
cycle.
The system performance is acceptable when the recorded number of cycles falls
between the upper and lower limits shown.
11. Determine the center A/C register discharge temperature.
1. Record the ambient temperature.