Dynasty L4-153 2.5L SOHC VIN K TBI (1992)
High Pressure Sensor / Switch: Testing and Inspection
Review SAFETY PRECAUTIONS AND WARNINGS before proceeding with this operation.
Connect a suitable manifold gauge set to the refrigerant system service ports. Work area temperature can not be below 21°C (70°F).
1. Raise hood of vehicle.
2. With gear selector in park or neutral, and park brake set, start engine and allow to idle at 1300 rpm.
3. Set the A/C controls to A/C and High blower.
4. If the high pressure gauge reads below 2963 kPa (430 psi) ± 138 kPa (20 psi) the compressor clutch should be engaged.
CAUTION: Do not allow engine to overheat when radiator air flow is blocked.
5. Block radiator air flow with a suitable cover to increase the high side pressure to at least 3100 kPa (450 psi). Compressor clutch should disengage.
6. Remove cover from front of vehicle to allow high side pressure to decrease. When pressure drops below 1826 kPa (265 psi), compressor clutch
should engage.
If High Pressure control Switch is defective, replace it.
