Nissan Versa

 Sedan Service Manual

Ventilation, heater & air conditioner » Heater & air conditioning system (HA)
Performance test

Inspection

INSPECTION PROCEDURE

1. Connect recovery/recycling/recharging equipment (for HFC-134a) or manifold gauge.
2. Start the engine, and set to the following condition.

Test condition                                           

3. Maintain test condition until A/C system becomes stable. (Approximately 10 minutes)
4. Check that test results of "recirculating-to-discharge air temperature" and "ambient air temperature-tooperating pressure" are within the specified value.
5. When test results are within the specified value, inspection is complete.

   If any test result is out of the specified value, perform diagnosis by gauge pressure. Refer to HA "Symptom Table".

RECIRCULATING-TO-DISCHARGE AIR TEMPERATURE TABLE   

AMBIENT AIR TEMPERATURE-TO-OPERATING PRESSURE TABLE   

SYMPTOM DIAGNOSIS

HEATER AND AIR CONDITIONING SYSTEM SYMPTOMS

Symptom Table

SYMPTOM TABLE

REFRIGERATION SYSTEM SYMPTOMS

Trouble Diagnosis For Unusual Pressure

Diagnose using a manifold gauge whenever system's high and/or low side pressure(s) is/are unusual. The marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Refer to Ambient air temperature-to-operating pressure table since the standard (usual) pressure, differs from vehicle to vehicle.

Symptom Table

NOISE

Symptom Table

REMOVAL AND INSTALLATION

Precautions

Preparation

Component parts

Refrigeration system

Diagnosis and repair workflow

Refrigerant

Oil

Performance test

Compressor

Condenser

Low-pressure flexible hose

High-pressure flexible hose

High-pressure pipe

Expansion valve

Refrigerant pressure sensor

A/C Unit assembly

Evaporator