System Check

1. With engine cold and idling, turn A/C selector, if equipped, to NORM. On VIN E, coolant fan should turn on. On VINs S, T, F and 8, coolant fan, and auxiliary coolant fan if equipped, should turn on when A/C control head pressure exceeds 233 psi.
2. With engine coolant below operating temperature, move A/C selector to off. On VIN E, coolant fan should turn off. On VIN S, T, F and 8, coolant fan, and auxiliary coolant fan if equipped, should turn off when A/C control head pressure falls below 233 psi.
3. With engine warm, run engine at fast idle foe several minutes. Ensure coolant fan turns on before coolant temperature indicator lights or before coolant temperature gauge needle indicates hot.
4. Turn ignition switch to OFF position. Coolant fan, and auxiliary coolant fan if equipped, should turn off.