| From the Service Manual: The ECM controls the radiator (auxillary)fan Operation corresponding to VEHICLE SPEED, engine coolent tempature, and air conditioner ON signal.
{non-turbocharged model)
Air conditioner switch is "off"
Engine coolent temperture....................Radiator fan
.......below 219....................................off
.......Above 221...................................on
Air conditioner switch is "on"
Vehicle speed ...Engine coolent tempature....Radiator fan
Below 24..................below 201....................off
...........................above 201.......................on Above 25 ...............below 219...............off
........................above 221...............on (Turbocharged model) Air conditioner switch is "off"
Engine coolent temperture....................Radiator fan
.......below 219.................................off
.......Above 221.................................on Air conditioner switch is "on"
Vehicle speed ...Engine coolent tempature....Radiator fan
Below 24................below 192...............off
...................between 194 and 210..........low
......................above 212.................high Above 25 ...............below 219...............off
........................above 221...............high
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