Question about 1998 Mercury Villager
Replaced ECT sensor, all relays checked good. How do I check the wiring or the ECM
The ECT sensor needs a power and ground to operate. It uses resistance to create a signal that is sent back to the computer. You can use a volt meter and check the plug for a 5 volt reference on one wire and the other wire will be a ground. If no 5 volt reference, look for a burned out fuse or broken/damaged wiring. A scan tool that shows data would be very helpful in knowing what the sensor is reading. The sensor may be reading properly and the problem may be due to a low coolant level or defective thermostat
Posted on Jan 05, 2016
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Posted on Jan 02, 2017
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