Ford 2003 Mustang Workshop Manual page 3105

SECTION 412-00: Climate Control System - General Information
GENERAL PROCEDURES
Refrigerant System Tests
Special Tool(s)
R-134a Manifold Gauge Set
176-R032A or equivalent
1. Connect the R-134a Manifold Gauge Set. For additional information, refer to
Set Connection
2. Adjust the climate controls for maximum cooling.
Start the engine.
Select MAX A/C operation.
Set the blower motor speed to maximum.
3. Stabilize the in-vehicle temperature at 21-27°C (70-80°F).
4. NOTE: When the ambient temperatures exceed 38°C (100°F), do not run the engine above
normal idle speed.
Maintain the engine speed at 1,500 rpm.
5. Determine the compressor discharge (high) pressure.
1. Record the ambient temperature.
2. Record the discharge (high) 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.
in this section.
2003 Mustang Workshop Manual
Manifold Gauge