Initial Inspection and Diagnostic Overview

WARNING: NEVER REMOVE THE RADIATOR CAP UNDER ANY CONDITIONS WHILE THE ENGINE IS OPERATING. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT IN PERSONAL INJURY AND/OR DAMAGE TO THE COOLING SYSTEM OR ENGINE. TO AVOID HAVING SCALDING HOT COOLANT OR STEAM BLOW OUT OF THE RADIATOR, USE EXTREME CARE WHEN REMOVING THE RADIATOR CAP FROM A HOT RADIATOR. WAIT UNTIL THE ENGINE HAS COOLED, THEN WRAP A THICK CLOTH AROUND THE RADIATOR CAP AND TURN IT SLOWLY TO THE FIRST STOP. STEP BACK WHILE THE PRESSURE IS RELEASED FROM THE COOLING SYSTEM. WHEN YOU ARE CERTAIN ALL THE PRESSURE HAS BEEN RELEASED, PRESS DOWN ON THE RADIATOR CAP (WITH A CLOTH), TURN AND REMOVE.

1. Verify the customer concern.
2. Visually inspect the following for obvious signs of mechanical and electrical damage:

Mechanical
- Coolant level and condition
- Radiator, thermostat and hose condition
- Engine cooling fan blade interference
- Engine cooling fan motor mounting
- Engine cooling fan motor blade attachment to motor shaft.

Electrical
- Blown fuse:
+ 40A COOLING FAN
- Damaged wiring harness
- Loose or corroded connections

3. If the concern is not visually evident, verify the symptom and refer to the symptom chart. Symptom Related Diagnostic Procedures