Symptoms - Heating, Ventilation, and Air Conditioning

Symptoms - Heating, Ventilation, and Air Conditioning

NOTE: The following steps must be completed before using the symptom tables.

1. Perform the Diagnostic System Check - Vehicle before using the symptom tables in order to verify that all of the following are true:
- There are no DTCs 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 Fuel Operated Heater Description and Operation.

Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the system. Refer to Checking Aftermarket Accessories.
- 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 Conditions and Poor Connections.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose symptoms from the fuel operated parking heater:
- Fuel Operated Heater Diagnostic Trouble Code (DTC) Displaying and Clearing
- Fuel Operated Heater Remote Control Malfunction
- Fuel Operated Heater Malfunction