Heater & Air Conditioning System

SYMPTOM DIAGNOSIS

REFRIGERATION SYSTEM

SYMPTOMS SYMPTOM DIAGNOSIS PROCEDURE

SYMPTOM DIAGNOSIS PROCEDURE : 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

Symptom Matrix Chart:

BOTH HIGH- AND LOW-PRESSURE SIDES ARE TOO HIGH : Symptom Matrix Chart

HIGH-PRESSURE SIDE IS TOO HIGH AND LOW-PRESSURE SIDE IS TOO LOW

Symptom Matrix Chart:

HIGH-PRESSURE SIDE IS TOO HIGH AND LOW-PRESSURE SIDE IS TOO LOW : Symptom Matrix Chart

HIGH-PRESSURE SIDE IS TOO LOW AND LOW-PRESSURE SIDE IS TOO HIGH

Symptom Matrix Chart:

HIGH-PRESSURE SIDE IS TOO LOW AND LOW-PRESSURE SIDE IS TOO HIGH : Symptom Matrix Chart

BOTH HIGH - AND LOW-PRESSURE SIDES ARE TOO LOW

Symptom Matrix Chart:

BOTH HIGH - AND LOW-PRESSURE SIDES ARE TOO LOW : Symptom Matrix Chart

LOW-PRESSURE SIDE SOMETIMES BECOMES NEGATIVE

Symptom Matrix Chart:

LOW-PRESSURE SIDE SOMETIMES BECOMES NEGATIVE : Symptom Matrix Chart

LOW-PRESSURE SIDE BECOMES NEGATIVE

Symptom Matrix Chart:

LOW-PRESSURE SIDE BECOMES NEGATIVE : Symptom Matrix Chart