Ford Mustang (1999-2004) Service Manual: 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 Manifold Gauge Set Connection in this section.

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 21-27C (70-80F).

4. NOTE: When the ambient temperatures exceed 38C (100F), do not run the engine above normal idle speed.

Maintain the engine speed at 1,500 rpm.

Refrigerant System Tests

5. Determine the compressor discharge (high) pressure.

1. Record the ambient temperature.

2. Record the discharge (high) pressure.

3. NOTE: In ambient temperatures between 38-43C (100-110F), the system performance pressures will be the same as those for ambient temperatures shown on the chart in the 32-38C (90-100F) range.

The system performance is acceptable when the pressure reading falls between the upper and lower limits shown.

Refrigerant System Tests

6. Determine the compressor suction (low) pressure.

1. Record the ambient temperature.

2. Record the suction (low) pressure.

3. NOTE: In ambient temperatures between 38-43C (100-110F), the system performance pressures will be the same as those for ambient temperatures shown on the chart in the 32-38C (90-100F) range.

The system performance is acceptable when the pressure reading falls between the upper and lower limits shown.

Refrigerant System Tests

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 26C (80F), the A/C clutch may not cycle.

The system performance is acceptable when the recorded time falls between the upper and lower limits shown.

Refrigerant System Tests

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 26C (80F), the A/C clutch may not cycle.

The system performance is acceptable when the recorded time falls between the upper and lower limits shown.

Refrigerant System Tests

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 26C (80F), the A/C clutch may not cycle.

The system performance is acceptable when the recorded time falls between the upper and lower limits shown.

Refrigerant System Tests

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 26C (80F), 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.

Refrigerant System Tests

11. Determine the center A/C register discharge temperature.

1. Record the ambient temperature.

2. Record the center A/C register discharge temperature.

3. NOTE: In ambient temperatures between 38-43C (100-110F), the A/C register discharge temperatures will be the same as those for ambient temperatures shown on the chart in the 32-38C (90-100F) range.

The system performance is acceptable when the center A/C register discharge temperature falls between the upper and lower limits shown.

Refrigerant System Tests

Air Conditioning (A/C) Clutch Air Gap Adjustment

1. Check the A/C clutch air gap at three equally-spaced places between the A/C clutch hub (2884) and the A/C clutch pulley (2E884).

Air Conditioning (A/C) Clutch Air Gap Adjustment

2. Remove the A/C clutch. Add or remove spacers between the A/C clutch and the compressor shaft until clearance is within specification. For additional information, refer to Section.

    Air Conditioning Line (Peanut) Fitting
    Disconnect 1. CAUTION: Support the female fitting with a wrench to prevent the tubes from twisting. Remove the nut from the peanut fitting. 2. Pull the peanut fitting apart. 3. CAUTION: Do not us ...

    Manifold Gauge Set Connection
    Special Tool(s) R-134a Manifold Gauge Set 176-R032A or equivalent 1. Turn both valves on the R-134a Manifold Gauge Set clockwise to close the low- and highpressure hoses to the center ...

    Other materials:

    Extension Housing Seal and Gasket
    Special Tool(s) Slide Hammer 100-001 (T50T-100-A) Installer, Transmission Extension Housing Fluid Seal 308-002 (T61L-7657-A) Remover, Transmission Fluid Seal 307-048 (T74P-77248-A) Removal 1. Drain the transmiss ...

    Installation
    WARNING: To reduce the risk of serious personal injury, read and follow all warnings, cautions and notes at the beginning of the removal procedure. Vehicles receiving a new clockspring 1. NOTE: A new clockspring is supplied in a centralized position a ...

    Clutch Pedal - Quadrant and Pawl Assembly
    Removal 1. Disconnect the battery ground cable (14301). 2. Loosen the nut from inside the engine compartment. 3. Loosen the nuts from inside the vehicle. 4. Loosen the screw. 5. Disconnect the brake pedal position (BPP) switch electrical connector. ...