Insufficient Cooling (Performance Test)

TROUBLE DIAGNOSIS PROCEDURE FOR INSUFFICIENT COOLING SYMPTOM
- Insufficient cooling




INSPECTION FLOW

Part 1 Of 2:

Part 2 Of 2:

PERFORMANCE TEST DIAGNOSES

PERFORMANCE CHART




Test Condition
Testing must be performed as follows:

Test Reading




Recirculating-to-discharge Air Temperature Table




Ambient Air Temperature-to-operating Pressure Table

TROUBLE DIAGNOSES FOR ABNORMAL PRESSURE
Whenever system's high and/or low side pressure is abnormal, diagnose using a manifold gauge. The marker above the gauge scale in the following tables indicates the standard (normal) pressure range. Since the standard (normal) pressure, however, differs from vehicle to vehicle, ("Ambient air temperature-to-operating pressure table").




Both High and Low-pressure Sides are Too High.




High-Pressure Side is Too High and Low-pressure Side is Too Low.




High-pressure Side is Too Low and Low-pressure Side is Too High.




Both High and Low Pressure Sides Are Too Low.




Low-pressure Side Sometimes Becomes Negative.




Low-pressure Side Becomes Negative.