Insufficient Cooling (Performance Test)
Insufficient CoolingSYMPTOM: Insufficient cooling
Inspection Flow Part 1:
Inspection Flow Part 2:
INSPECTION FLOW
Performance Test Diagnosis Part 1:
Performance Test Diagnosis Part 2:
PERFORMANCE TEST DIAGNOSIS
PERFORMANCE CHART
Test Condition
Testing must be performed as Shown:
Test Reading (VQ35DE)
Recirculating-to-discharge Air Temperature Table
Ambient Air Temperature-to-operating Pressure Table
Test Reading (VK45DE)
Test Reading (VQ35DE)
Recirculating-to-discharge Air Temperature Table
Ambient Air Temperature-to-operating Pressure Table
TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE
Whenever system's high and/or low side pressure(s) is/are unusual, diagnose using a manifold gauge. The marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Since the standard (usual) pressure, however, differs from vehicle to vehicle, refer to above table (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
Diagnostic Procedure For Insufficient Cooling (Step 1):
Diagnostic Procedure For Insufficient Cooling (Steps 2 - 4)):
DIAGNOSTIC PROCEDURE FOR INSUFFICIENT COOLING