Symptoms

IMPORTANT: Complete the following steps before using the symptom tables:

1. Perform the A Diagnostic System Check before using the Symptom Tables in order to verify that all of the following are true:
^ No DTCs are set.
^ The control modules can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to the following procedures:
^ Dual Zone A/C System Description. Dual Zone A/C System Description
^ Operating Modes
^ Purge Mode Description. Purge Mode Description
^ Programmer Description. Programmer Description
^ Control Assembly Description. Control Assembly Description
^ Control Assembly Description - Passenger. Control Assembly Description - Passenger

Visual/Physical Inspection
^ Inspect for aftermarket devices which could affect the operation of the HVAC System. Refer to Checking Aftermarket Accessories in Diagrams.
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent and Poor Connections in Diagrams.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ HVAC Compressor Clutch Does Not Engage. Compressor Clutch Does Not Engage
^ Blower Motor Always On. Blower Motor Always On
^ Blower Motor Does Not Operate Properly (Front) or Blower Motor Does Not Operate Properly (Rear). Blower Motor Does Not Operate Properly
^ Cooling Insufficient, A/C System. Cooling Insufficient
^ Air Temperature Control Inoperative - Passenger Air Temperature Control Inoperative - Passenger
^ Air Delivery Improper Air Delivery Improper
^ Self-Diagnostics. Self-Diagnostics - HVAC System - Automatic
^ Heating Insufficient in Heating, Ventilation and Air Conditioning. Heating Insufficient
^ Noise Diagnosis - Blower Motor in Heating, Ventilation and Air Conditioning. Noise Diagnosis - Blower Motor
^ Noise Diagnosis - A/C System in Heating, Ventilation and Air Conditioning. Noise Diagnosis - A/C System
^ Odor Diagnosis in Heating, Ventilation and Air Conditioning. Odor Diagnosis