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1. Cummins Speed Control Unit Manual

Bookmarked, searchable, printable PDF Instant download Covers: Cummins ISB 5.9, QSB 5.9 Electronic Control System (VP44 fuel system, prior to 2003) Pages: 956 Format: PDF Compatibility: Windows/Mac/Tablet File size: 27mb Notes: Instant digital download only This manual contains Cummins ISB5.9 and QSB5.9 Electronic Control and Fuel System troubleshooting and repair instructions. Includes Cummins ISB5.9-44 and QSB5.9-44 wiring diagrams. This manual covers the electronic control system only. Engine mechanical troubleshooting and repair is.

Features and Parameters The ISX Idle features and parameters are easily set up. When deciding on the desired engine idle RPM make sure to pick an idle speed that doesn't promote noise and vibration. Idle Shutdown parameters should be set up to limit idle time, but not to inconvenience operators who rely on the engine for cab heat, air conditioning, etc. Idle Engine Speed Specify the desired idle speed. Speed should be chosen to limit cab noise and vibration. The range is between 600 and 800 RPM.

The S6700H Speed Control Unit is an all-electronic device designed to control engine speed with fast and precise response according to the momentary load.

Idle Shutdown Choose this feature to enable the engine to automatically shutdown after running at idle for a programmed amount of time. This feature is used to limit idle time and increase the vehicle's fuel economy.

A warning light will begin to flash during the last 30 seconds of the programmed idle shutdown time. Idle Shutdown Timer Specify the maximum idle time allowed before engine shutdown (see table below for limits). The Idle Shutdown Timer can be reset at any time prior to shutdown by momentarily changing the position of the accelerator, brake or clutch pedals.

This permits drivers to delay the engine shutdown as long as they are present, effectively preventing the shutdown. Idle Shutdown incorporates an additional security measure that monitors the position of the pedals and overrides the timer reset if it detects a relatively long period of constant input. This ensures that Idle shutdown will still be effective even if the position of the pedals has been artificially changed such as would be achieved through the use of a throttle stick.

Idle Shutdown Manual Override This feature option allows the operator to override the engine shutdown timer by altering the position of the accelerator, brake or clutch pedals during the last 30 seconds of the programmed shutdown time. During the last 30 seconds of programmed idle time the Amber dash light will begin flashing. Idle Shutdown Override should be used if the operator relies on engine power for cab heat, air conditioning, etc. Once over-ridden, the idle shutdown feature will not initiate an engine shutdown until after the vehicle has moved and returned to idle, the PTO/remote PTO feature becomes active, or the engine is 'keyed-off', restarted and then returned to idle.Issue: For calibrations released before summer of 2004, if the Manual Override and Ambient Air Temperature Override options are both enabled, the driver will not be able to 'reset' the timer after the warning light starts flashing.

Calibrations released after summer of 2004 will fix this issue. Idle Shutdown in PTO Choose this feature to enable the engine to automatically shutdown after running in PTO with no activity for a programmed amount of time.

This feature is used to limit idle PTO time and increase the vehicle's fuel economy. Idle Shutdown Percentage PTO Load Override When Idle PTO Shutdown is enabled, the Idle Shutdown Percentage PTO Load Override is the threshold that will allow the user to operate PTO without the engine being shutdown due to the Idle Shutdown in PTO feature. As long as the engine load is greater than the customer-entered value for Idle Shutdown Percentage PTO Load Override, then the engine will not be shutdown. If the engine load is less than the customer-entered value for Idle Shutdown Percentage PTO Load Override, then the engine will shut down after the Idle Shutdown Timer has expired. The Idle Shutdown Percentage PTO Load Override can be set at any value between 0% and 100%.

Idle Shutdown Ambient Air Temperature Override Choose this feature to enable or disable Idle shutdown based on outside air temperature. To use this feature it is necessary for an additional ambient air temperature sensor to be installed. Three temperature values: 'Intermediate', 'Hot' and 'Cold' are selected and these are used to influence the activation of the Idle Shutdown Override feature. This option interacts with the Manual Override option, in accordance with this table: Ambient Temperature Example (° F) ENABLED Manual Override DISABLED Manual Override Colder than 'Cold' 20°F Auto-shutdown is Disabled.

Engine stays running. Auto-shutdown is Disabled. Engine stays running. Between 'Cold' and 'Intermediate' 50°F Manual Override option is Activated. Engine shuts down after timer expires, unless driver 'overrides' with pedal. Override keeps engine running indefinitely. Engine shuts down after timer expires, unless driver 'Resets' timer with pedal.

Between 'Intermediate' and 'Hot' 70°F Manual Override option is Deactivated. Engine shuts down after timer expires, unless driver 'resets' timer with pedal. See Issue below. Engine shuts down after timer expires, unless driver 'Resets' timer with pedal.

Hotter than 'Hot' 90°F Manual Override option is Activated. Engine shuts down after timer expires, unless driver 'overrides' with pedal. Override keeps engine running indefinitely. Engine shuts down after timer expires, unless driver 'Resets' timer with pedal. DISABLED Ambient Temperature Override Option N/A Manual Override option is activated always. Engine shuts down after timer expires, unless driver 'overrides' with pedal.

Override keeps engine running indefinitely. Engine shuts down after timer expires, unless driver 'resets' timer with pedal.Issue: For calibrations released before summer of 2004, if the Manual Override and Ambient Air Temperature Override options are both enabled, the driver will not be able to 'reset' the timer after the warning light starts flashing. Calibrations released after summer of 2004 will fix this issue. Idle Shutdown Intermediate Ambient Air Temperature Select the minimum ambient air temperature, in terms of degrees Fahrenheit (°F), at which the driver would not be likely to experience discomfort should the engine be automatically shutdown by the Idle Shutdown Timer.

The Intermediate Ambient Air Temperature can be set at a value of between 0 °F to 120 °F. The suggested Intermediate Ambient Air Temperature value is about 60 °F. When the Idle Shutdown Manual Override option is Disabled, this parameter has no impact. When the Idle Shutdown Manual Override option is Enabled, this parameter is used to disable the Manual Override for 'comfortable' temperatures, ranging between the Intermediate and Hot temperature settings. For ambient temperatures between the Cold and Intermediate settings, the Manual Override option is still active.

Idle Shutdown Hot Ambient Air Temperature Select an ambient air temperature, in terms of degrees Fahrenheit (°F), above which the driver can manually override the automatic Idle Shutdown. The Hot Ambient Temperature can be set at a value of between 0 °F and 120 °F Fahrenheit and must be greater than the Intermediate temperature value. The suggested Hot Ambient Air Temperature value is about 85 °F.

When the Idle Shutdown Manual Override option is Disabled, this parameter has no impact. When the Idle Shutdown Manual Override option is Enabled, this parameter is used to set the threshold above which the Manual Override option will be activated.

See description of Idle Shutdown Intermediate Ambient Air Temperature above for more details. Idle Shutdown Cold Ambient Air Temperature Select an ambient air temperature, in terms of degrees Fahrenheit (°F), below in which the engine will stay running and will not begin auto-shutdown.

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The Cold Ambient Air Temperature can be set at a value of between 0 and 120 °F and should be less than the Intermediate temperature value. The suggested Cold Ambient Air Temperature value is about 30 °F. At ambient air temperatures between the Cold and Intermediate temperature values, the driver can manually override Idle Shutdown. Idle Shutdown Hot Ambient Automatic Override This parameter, when enabled, allows automatic override of the Idle Shutdown Hot Ambient Air Temperature threshold. This parameter is user adjustable.

Cummins Speed Control Unit Manual

Idle Shutdown Manual Override Inhibit Zone Enable The Idle Shutdown Manual Override Inhibit Zone feature provides an option to enable or disable manual override if the temperature is between Hot Ambient Setting and Intermediate Ambient Setting (i.e. Manual Override Inhibited zone).