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Home >> Jeep >> 1981 >> Cherokee Base, 2D Utility, 4.2L Eng VIN C, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Computerized Emission Control >> Operation >> Data Sensors >> Open Loop 1 (OL1) Coolant Temperature Switch
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Open Loop 1 (OL1) Coolant Temperature Switch

This switch is an integral component of the intake manifold heater coolant temperature control switch. This switch is controlled by coolant temperature and is normally closed. When open, the switch indicates engine is cold (less than 160°F).

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