Symptom Table

IMPORTANT: The following steps must be completed 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:
^ There are no DTCs set.
^ The control module(s) can communicate via the serial data link. Initial Inspection and Diagnostic Overview

2. Review the system operation in order to familiarize yourself with the system functions.
^ Operating Modes. Operating Modes
^ Relays and Sensors Description. Relays and Sensors Description
^ HVAC Blower Controls Circuit Description. HVAC Blower Controls Circuit Description
^ HVAC Compressor Controls Circuit Description. HVAC Compressor Controls Circuit Description
^ Temperature Control Motor Circuit Description. Temperature Control Motor Circuit Description
^ A/C System Description. A/C System Description
^ Heater System Description. Heater System Description
^ Air Distribution System Description. Air Distribution System Description
^ Control Assembly Description. Control Assembly Description

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 EngageCompressor Clutch Does Not Engage
^ HVAC Compressor Clutch Does Not DisengageCompressor Clutch Does Not Disengage
^ Blower Motor Inoperative at Any SpeedBlower Motor Inoperative - At Any Speed
^ Blower Motor Low Speed InoperativeBlower Motor Low Speed Inoperative
^ Blower Motor Medium Speed Inoperative (Position 2)Position 2
^ Blower Motor Medium Speed Inoperative (Position 3)Position 3
^ Blower Motor Medium Speed Inoperative (Position 4)Position 4
^ Blower Motor High Speed InoperativeBlower Motor High Speed Inoperative
^ Air Delivery ImproperAir Delivery Improper
^ Temperature Control InoperativeTemperature Control Inoperative
^ Cooling Insufficient, A/C SystemCooling Insufficient - A/C System
^ Heating InsufficientHeating Insufficient
^ Noise Diagnosis - Blower MotorNoise Diagnosis - Blower Motor
^ Noise Diagnosis - A/C SystemNoise Diagnosis - A/C System
^ Cold Drafts on FloorCold Drafts on Floor
^ Odor DiagnosisOdor Diagnosis