C7 Engines for Combat and Tactical Vehicles Caterpillar

Timer Parameters

Usage:

C7 FML

"Idle Shutdown Time"

The "Idle Shutdown Time" is the time (minutes) of engine idle before shutting down. The engine will only shut down if the Engine Control Module (ECM) senses low engine load and no vehicle speed. The "Idle Shutdown Time" will not begin counting if the engine is in cold mode. If this parameter is programmed to zero, this feature is disabled and the engine will idle until the key switch is turned to the OFF position.

Note: This feature does not shut down the vehicle's power. The ECM and the vehicle remain powered.

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Table 1
Minimum	Maximum	Default
3 minutes	1440 minutes	0 minutes

"Allow Idle Shutdown Override"

This parameter determines if the clutch or the service brake can be used to override the idle shutdown timer during the driver alert. The driver alert is the last 90 seconds when the check engine lamp begins flashing. This parameter requires the "Idle Shutdown Time" to be programmed to three or more minutes for the parameter to be enabled. When the "Idle Shutdown Time" is programmed to zero, the parameter is turned off.

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Table 2
Alternative	Default
"No"	"Yes"

"A/C Switch Fan-On Time (0 = Off)"

The input 11 to the ECM can be used for the connection of a normally closed high pressure A/C switch. The ECM has a built-in timer. The timer is used to prevent excessive cycling of the cooling fan clutch due to successive cycling of the A/C switch. Programming this parameter to zero disables the function. Programming depends on the refrigerant and the design of the air conditioning system as well as the use of the signal input. Program the timer to one second for the connection of this input to another system. Programming the timer to one second also provides a time delay. This feature requires the "Fan Control Type" parameter to be programmed to "On/Off" or to "Variable Speed Fan Option S". Also, the "A/C High Pressure Switch" parameter must be programmed to "J1/P1:41".

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Table 3
Minimum	Maximum	Default
0 second	600 seconds	0 seconds

"Fan with Engine Brake On"

This parameter determines whether the cooling fan will turn on when the engine brake has been active for at least two seconds. This feature requires the "Fan Control Type" parameter to be programmed to "On/Off". An on/off fan must also be installed in order for this option to be functional.

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Table 4
Alternatives	Default
"Yes"	"No"

"Exhaust Brake Configuration"

This parameter determines the functionality of the exhaust brake. The exhaust brake can be programmed only as an exhaust brake to aid in slowing the vehicle or the exhaust brake can be programmed to put a load on the engine in order to warm up the engine faster.

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