Symptom Chart

WARNING: This page is about a different car, the 2002 Ford Escort. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
Loss of coolant	Hoses and hose connections. Radiator (8005). Water pump (8501). Heater core (18476). Gaskets. Engine casting cracks. Engine block core plugs.	Go To PINPOINT TEST A: LOSS OF COOLANT .
The engine overheats	Engine coolant weak, contaminated or low. Thermostat. Fuse. Constant control relay module (CCRM) (12B581). Circuit. Fan motor (8C607). Engine coolant temperature (ECT) sensor (12A648). Powertrain control module (PCM) (12A650).	Go To PINPOINT TEST B: THE ENGINE OVERHEATS .
The engine does not reach normal operating temperature	Thermostat. Thermostat float/seat housing.	Go To PINPOINT TEST C: THE ENGINE DOES NOT REACH NORMAL OPERATING TEMPERATURE .
The block heater does not operate correctly	Power cord.	CHECK for continuity in all three power cord circuits. INSTALL a new power cord, if necessary.
The block heater does not operate correctly	Engine block heater.	INSTALL a new engine block heater.
The engine cooling fan high speed is inoperative	Constant control relay module. Circuit. Powertrain control module. Fan motor.	REFER to the appropriate engine diagnosis article.