![]() Idle shutdown time indicates the programmed value of engine idle time before engine will shutdown.Tamper proof – prohibits operator over-ride.No engine load – allows prolonged engine idle shutdown when engine is in low idle / no load condition.PTO available – allows prolonged engine idle shutdown when engine is in low idle and PTO is disabled.Idle shutdown timer indicates to the on-board electronics that the vehicle has the following features:.There are four states of the IST electronic operation. Reduced emissions, fuel consumption, and engine wear are all direct results from the IST strategy. The IST feature provides several advantages when enabled. Shift selector is moved from neutral or park (automatic transmissions).Clutch pedal is depressed or a fault for the clutch pedal switch is detected (manual transmissions, if equipped with clutch switch).Brake pedal movement or a brake switch fault is detected.Ambient air temperature is below 16 ☌ (60 ☏) or above 44 ☌ (110 ☏).Engine coolant operating temperature is below 60 ☌ (140 ☏).Vehicle movement or a Vehicle Speed Sensor (VSS) fault is detected.Engine speed is not at idle speed (700 rpm).Power Takeoff (PTO) applications can be programmed to disable the IST feature for load levels or when PTO features are active. The IST feature can be programmed to operate at specific ambient air temperatures, allowing engine operation in cold or hot weather. The engine must be out of gear for the IST to work. Idle time is measured from last clutch or brake pedal transition. The operator the engine is approaching shutdown. The lamp will flash for 30 seconds to warn The idle timer can be programmed for the customer to automatically shut the engine down for idle times that range from 2 to 120 minutes.īefore engine shutdown, the red ENGINE lamp will illuminate. The IST is an optional feature that allows the ECM to shutdown the engine when an extended idle condition occurs. The function diagram for the IST system includes the following:
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