Chevrolet Trax: Air conditioning (a/c) system performance test
This test measures the operating efficiency of the A/C system under the
following conditions:
- The current ambient air temperature
- The current relative humidity
- The high side pressure of the A/C system
- The low side pressure of the A/C system
- The temperature of the air being discharged into the passenger
compartment
Test Description
The numbers below refer to the step numbers on the diagnostic table.
1
This step determines if the A/C system has at least the minimum refrigerant
charge required to operate the
system without damage.
2
This step measures the performance of the A/C system.
3
This step is to allow for vehicle variations as well as high ambient
temperatures.
Air Conditioning (A/C) System Performance Test
A/C Performance Table
A/C DIAGNOSTICS CHART
HEATING PERFORMANCE DIAGNOSTIC
Heating Performance Diagnostic
DEFROSTING INSUFFICIENT
Defrosting Insufficient
NOISE DIAGNOSIS - BLOWER MOTOR
Noise Diagnosis - Blower Motor
AIR CONDITIONING COMPRESSOR OIL DIAGNOSIS
Air Conditioning Compressor Oil Diagnosis
NOISE DIAGNOSIS - AIR CONDITIONING (A/C) SYSTEM
Noise Diagnosis - Air Conditioning (A/C) System
NOISE DIAGNOSIS - HVAC MODULE
Noise Diagnosis - HVAC Module
ODOR DIAGNOSIS
Odor Diagnosis
READ NEXT:
Eliminating Air Conditioning Odor
Odors may be emitted from the air conditioning system primarily at start
up in hot, humid climates. The
following conditions may cause the odor:
Debris is pre
Draining Procedure
NOTE: Drain and measure as much of the refrigerant oil as possible
from the rear
head ports of the removed air conditioning compressor.
Before draining oil, position the compress
SEE MORE:
ABRASIVE CLEANING
removing contaminants using a cleaning agent containing abrasive material.
Cleaning that requires
physical abrasion (e.g., glass bead blasting, wire brushing).
ADDITIVE
in automotive terminology, a substance added to a liquid, such as engine oil,
transmission fluid, gear oil or c
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
D