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Fig. Showing the location of MAP Sensor and other components on
the front of the engine: 1. Manifold Absolute Pressure (MAP) Sensor; 2.
Idle Air Control (IAC) Valve; 3. Engine Coolant Temperature (ECT)
Sensor; 4. Throttle Position (TP) Sensor
If your fans are not coming on then your engine is not receiving the signal that it is overheating. This can be caused by bad fans (unlikely they are both out) a bad relay, or coolant temperature sensor. I would start by checking or replacing the temperature sensor as it can become corroded which is what the PCM uses to turn the fans on. Many vehicles use two sensors, one for the gauge and the other for the ECU, make sure you check/replace the right one. It should be a cheaper part and if you are unsure then match the new one with its location; it should be on the intake manifold or near it, generally with one or two wires. I think you will find your problem as they are common failed parts.
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