Monitor Scan Tool Data
- Allow the engine to cool completely
- Run the cold engine at idle for 5 minutes and observe cooling fan status.NOTE: Ensure that the A/C is OFF
- Check the engine coolant temperature parameter at idle with the scan tool.
- Is the engine coolant temperature increase to above 50°C (122°F)
YES
- Go to "TERMINAL AND CONNECTOR INSPECTION " procedure
NO
- Go to next step
- Are the cooling fans running when engine coolant temperature is low (less than approximately 98°C (208°F)) with A/C OFF?
YES
- Check for short circuit in cooling fan harness or cooling fan relay. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- With ignition "ON", Install scan tool and select "COOLING FAN RELAY" on the Actuation Test mode.
- Activates "COOLING FAN RELAY" by pressing "STRT (F1)" key
- Repeat this procedure 4 or 5 times to ensure cooling fan reliability.
- If cooling fan works properly, go to SYSTEM INSPECTION
- If NG, check for intermittent fault caused by poor contact in the sensor's and/or ECM's connector. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.