Insufficient Cooling

Insufficient Cooling
SYMPTOM: Insufficient cooling

Step 1-5:

Step 5 (Continued)-11:

INSPECTION FLOW







PERFORMANCE TEST ANALYSIS

PERFORMANCE CHART




Test Condition

Test Reading




Recirculating-to-discharge Air Temperature Table




Ambient Air Temperature-to-operating Pressure Table

TROUBLE DIAGNOSIS 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 differs from vehicle to vehicle, refer to 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