Symptom Chart
WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM CHART
| Condition |
Possible Sources |
Action |
|
|
- Coolant hoses or tubes
- Hose clamps
- Coolant pump O-ring seal or gasket
- Thermostat O-ring seal or gasket
- Thermostat housing
- Radiator
- Degas bottle
- Pressure relief cap
- Coolant pump leaking from weep hole (LH side of block)
- Heater core
- Engine gaskets (may leak internally or externally)
- Cylinder block core plugs
- Cylinder head core plugs
- Block heater (if equipped)
|
|
|
|
- Low coolant level
- External engine coolant leak
- Airlock in system
- Pressure relief cap installation
- Restricted airflow through the A/C condenser/radiator
- Internal engine coolant leak
- Coolant condition/concentration
- Accessory drive components
- Non-OEM engine enhancement components
- Electric cooling fan
- Radiator
- Thermostat
- Cylinder Head Temperature (CHT) sensor
- Heater core
- Coolant pump
- Coolant flow restriction
|
|
- The engine does not reach normal operating temperature
|
- Low coolant level
- Thermostat
- Electric cooling fan always on
- Engine Coolant Temperature (ECT) indicator system (gauge)
- CHT
sensor
|
|
- The block heater does not operate correctly
|
|
- CHECK continuity in all 3 power cable circuits. If any circuit measures greater than 5 ohms, INSTALL a new power cable.
|
|
|
- CHECK the resistance of the block heater. If the resistance does not measure between 12.5 and 17.0 ohms, INSTALL a new block heater.
|
- The electric cooling fan is inoperative in one or more speeds or does not operate correctly
|
- Wiring
- Relays
- Fuses
- Fan Control (FC) module
- Cooling fan motor
- Cooling fan resistor
|
|
- The electric cooling fan stays on all the time
|
|
|
- Noisy electric cooling fan operation
|
- Foreign material contamination
- Fan motor
|
- REMOVE the foreign material from the cooling fan and shroud. TEST the system for normal operation. If still noisy, INSTALL a new cooling fan assembly.
|
- Fan blade detached from fan motor
|
- INSTALL a new cooling fan assembly.
|