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Home >> Saturn >> 1991 >> SL2 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Engine Controls - System/Component Tests >> A/C Pressure Switch
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A/C Pressure Switch

  1. Connect A/C pressure gauges to system and start engine. Note high and low pressure readings. If pressures are normal, go to step 2). If pressures are less than normal, check system for leaks. Evacuate and recharge as necessary. If pressures are high, check for system overcharge, overheating or mechanical failure in freon delivery system.
  2. Disconnect high and low pressure switches. Jumper across each switch harness connector to allow A/C system to function normally. Using an ohmmeter, check continuity between pressure switch terminals.
  3. Continuity should be present on both high and low switches (if equipped). If continuity is not present, replace A/C pressure switch. For wiring schematics, see mini-schematics in A/C CLUTCH  under MISCELLANEOUS CONTROLS.
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