A Symptoms - Engine Cooling

Symptoms - Engine Cooling

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

Visual/Physical Inspection
^ Inspect for aftermarket devices which could affect the operation of the Cooling System.
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
^ Inspect the surge tank reservoir for the proper coolant level.

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:
^ Low Engine Coolant Indicator Always On Low Engine Coolant Indicator Always On
^ Cooling Fan Inoperative Cooling Fan Inoperative
^ Cooling Fan Inoperative - Auxiliary Cooling Fan Inoperative
^ Cooling Fan Always On Cooling Fan Always On
^ Cooling Fan Always On - Auxiliary Cooling Fan - Auxiliary
^ Engine Overheating (LY7) Engine Overheating (LA3, LY9) Engine Overheating (LS6) Engine Overheating
^ Loss of Coolant (M 35) Loss of Coolant (M 82) Loss of Coolant
^ Thermostat Diagnosis (LA3, LY9) Thermostat Diagnosis (LY7) Thermostat Diagnosis (LS6) Component Tests
^ Engine Fails To Reach Normal Operating Temperature (LY7, LS6) Engine Fails To Reach Normal Operating Temperature (LA3, LY9) Engine Fails to Reach Normal Operating Temperature
^ Pressure Cap Testing
^ Cooling System Leak Testing Non-Trouble Code Procedures