1999 Buick Century 6 cyl Two Wheel Drive Automatic 71806 miles
Cooling fans do not start when engine gets hot. Grounding pins A3 or A11 causes associated fan to run OK so fans, fuses, and relays are OK.
Signal from Engine Coolant Temperature Sensor is about 3.3 volts when cold and goes down to about 2 volts as engine gets hot.
Is it the computer, is that the wrong voltage range for the coolant sensor, or is there another external signal to the computer that could do this?
have the same problem?
Tuesday, June 24th, 2008 AT 7:28 PM