OBD Diagnostics for Cooling Fan and Thermal Management

Engine temperature control is critical for reliability. OBD cooling system diagnostics help ensure fans and thermal controls activate at the correct times.

How Thermal Management Works

Cooling System Components

• Radiator fans

• Temperature sensors

• Thermostat control

OBD Indicators of Cooling Issues

Key Data Points

• Coolant temperature trends

• Fan activation timing

• Overheat warnings

Common Faults Detected

• Fan relay failure

• Faulty temperature sensors

• Delayed fan engagement

Benefits of Cooling Diagnostics

• Prevents engine damage

• Improves long-term reliability

• Supports preventive maintenance

Conclusion

OBD diagnostics provide early warning against overheating risks.