A Symptoms - Engine Cooling

Symptoms - Engine Cooling

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

Perform the Diagnostic System Check - Engine Cooling before using the Symptom Tables in order to verify that all of the following are true:
- There are no DTCs set. Diagnostic System Check
- 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

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 (L36) Cooling Fan Always On
- Cooling Fan Always On (LS1) Cooling Fan Always On
- Cooling Fan Inoperative (L36) Cooling Fan Inoperative
- Cooling Fan Inoperative (LS1) 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