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Compressor Control

  1. Install manifold gauge set. Start and run engine at 2000 RPM. Turn A/C on. Observe system pressure. Unplug pressure switch connector. Connect positive lead of DVOM to terminal No. 4 and negative lead to terminal No. 1. See Figure.
  2. Continuity should not exist when high-side pressure is higher than 455 psi (32.0 kg/cm2 ) or low-side pressure is lower than 28 psi (2.0 kg/cm2 ). Continuity should exist when high-side pressure is lower than 455 psi (32.0 kg/cm2 ) or low-side pressure is higher than 28 psi (2.0 kg/cm2 ). If continuity is not as specified, replace pressure switch.
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