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ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 008-027   Fan Clutch, On-Off

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General Information

General Information

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Many fan clutches can be controlled by the engine’s electronic control module (ECM). The ECM monitors coolant temperature and intake manifold temperature to determine when to engage the cooling fan. Some applications have additional sensors monitored by the ECM for fan control (for example, air conditioner pressure and transmission temperature). These are various fan clutch types, such as air-engaged, air-disengaged, electric, viscous, and on/off. Refer to the OEM service manual to determine fan clutch type.

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The ECM is capable of using either a 0-VDC or 12-VDC signal to engage the fan clutch. The enable logic is contained in the ECM calibration and can be programmed using INSITE™ electronic service tool.

Refer to the OEM service manual for fan clutch troubleshooting and repair information.

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Last Modified:  13-Mar-2009
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