Dual (Refrigerant) Pressure Switch Inspection

WARNING: This page is about a different car, the 2003 Suzuki Vitara, 2003 Suzuki Grand Vitara, 2002 Suzuki Vitara, and 2002 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.

Check dual pressure switch (1) on liquid pipe for continuity at normal temperature (approx. 25 °C, 77 °F) when A/C system has a proper charge of refrigerant and when A/C system (compressor) is under operation. In each of these cases, switches should show proper continuity.

Fig 1: Checking Dual Pressure Switch
Courtesy of SUZUKI OF AMERICA CORP.
Using a manifold gauge set, check switch for operation specified pressure as shown, see PERFORMANCE DIAGNOSIS OF A/C SYSTEM .

Dual pressure switch specification

Switch ON: above "C" and below "D"

Switch OFF: below "A" or above "B"

"A": Approx. 200 kPa (2.0 kg/cm ² )

"B": Approx. 3200 kPa (32 kg/cm ² )

"C": Approx. 23 kPa (2.3 kg/cm ² )

"D": Approx. 2800 kPa (28 kg/cm ² )

Tightening torque

Dual pressure switch: 10 N.m (1.0 kg-m, 7.5 lb-ft)

Fig 2: Checking Dual Pressure Switch

Courtesy of SUZUKI OF AMERICA CORP.