Symptoms - Engine Cooling

Symptoms - Engine Cooling

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


1. Perform the Diagnostic System Check - Vehicle (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 module(s) can communicate via the serial data link.

2. Review the system operation in order to familiarize yourself with the system functions. Refer to Cooling System Description and Operation (Cooling System).

Visual/Physical Inspection

* Inspect for aftermarket devices which could affect the operation of the system.
* 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.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

* Cooling Fan Always On (Cooling Fan Always On)
* Cooling Fan Inoperative (w/single fan) (Cooling Fan Inoperative (w/Single Fan))
* Engine Overheating (Engine Overheating)
* Loss of Coolant (Loss of Coolant)
* Thermostat Diagnosis (Thermostat Diagnosis)
* Coolant Heater Inoperative (Coolant Heater Inoperative)
* Engine Fails To Reach Normal Operating Temperature (Engine Fails To Reach Normal Operating Temperature)