A Symptoms - Engine Cooling

Symptoms - Engine Cooling

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

1. Perform the Diagnostic System Check - Engine Cooling before using the Symptom Tables in order to verify that all of the following are true:
2. There are no DTCs set.
3. The control module(s) can communicate via the serial data link.

Visual/Physical Inspection
- Inspect for aftermarket devices which could affect cooling system operation.
- 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
Cooling Fan Inoperative

- Coolant Heater Inoperative
Coolant Heater Diagnosis

- Engine Overheating
Engine Overheating

- Loss of Coolant
Loss of Coolant

- Thermostat Diagnosis
Thermostat Diagnosis

- Engine Fails To Reach Normal Operating Temperature
Engine Fails to Reach Normal Operating Temperature