For 1990-2009 cars

Important: Review the Cooling System Description and Operation in order to familiarize yourself with the system functions.

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the system. Refer to Checking Aftermarket Accessories in Wiring Systems.

• | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

• | Inspect all related ground points for being clean and tight.

### Intermittent

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

### Symptom List

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

• | Engine Overheating

• | Loss of Coolant

• | Thermostat Diagnosis

• | Engine Fails To Reach Normal Operating Temperature

• | Cooling System Draining and Filling

Refer to Symptoms - HVAC Systems - Manual in HVAC Systems -- Manual for diagnosis of the electric cooling fan.