Ford 2003 Mustang Workshop Manual page 3106

6. Determine the compressor suction (low) pressure.
1. Record the ambient temperature.
2. Record the suction (low) pressure.
3. NOTE: In ambient temperatures between 38-43°C (100-110°F), the system performance
pressures will be the same as those for ambient temperatures shown on the chart in the
32-38°C (90-100°F) range.
The system performance is acceptable when the pressure reading falls between the
upper and lower limits shown.
7. Determine the A/C clutch ON time.
1. Record the ambient temperature.
2. Record the A/C clutch ON time in seconds.
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.
8. Determine the A/C clutch OFF time.
1. Record the ambient temperature.
2. Record the A/C clutch OFF time in seconds.
3. NOTE: When the ambient temperature is above 26°C (80°F), the A/C clutch may not
cycle.