90 Quattro 20V (Canada) L5-2309cc 2.3L DOHC (7A) (1989)
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A/C Refrigerant Low Pressure Switch Test Graph
12. Measure temperature and match to closest temperature curve at E on graph.
This is your base measurement.
13. Adjust fresh air blower speed (F on graph) according to selected temperature curve at E.
TEST PROCEDURES
1. Insert thermometer in canter vent.
2. Start engine. After approximately 30 seconds, raise idle speed to 2000 RPM.
This Starts the Test Time Period.
3. Measure temperature at center vent.
4. Compare temperature at center vent with temperature from selected curve B (your base measurement) in relation to time period C.
