Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Toyota >> 1998 >> Tercel Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> A/C-Heater System >> Testing >> Pressure Switch >> Compressor Control

Compressor Control

  1. Install manifold gauge set. Start and run engine at 1500 RPM. Turn A/C on. Observe system pressure. Unplug pressure switch connector. Using a DVOM, check for continuity between pressure switch terminals No. 1 and 4. See Figure.
  2. Continuity should not exist when low side pressure is lower than 28 psi (2.0 kg/cm2 ) or high side pressure is higher than 455 psi (32 kg/cm2 ). Continuity should exist when low side pressure is higher than 28 psi (2.0 kg/cm2 ) or high side pressure is lower than 455 psi (32 kg/cm2 ). If continuity is not as specified, replace pressure switch.
scientia non olet · About Mike's Workshop Manuals