The CELECT™ system is an electronically controlled fuel injection system that optimizes fuel economy and reduces exhaust emissions. It does this by controlling the torque and horsepower curve, air-fuel control (AFC)
function, engine high speed, low idle, and road speed.
An ECM password is available to secure functions in the programmable memory of the electronic control module (ECM). Refer to the appropriate tool users manual for more detailed instructions. This capability will:
Reduce the risk of unauthorized program memory changes that can compromise the performance and reliability of the engine.
Reduce the risk of unauthorized clearing of information in the ECM, thus keeping integrity of customer data residing in the ECM.
The original factory programmed value is NO password.
The fault lamp diagnostic feature is used to determine if the diagnostic dashboard lamps have been installed and wired correctly. When the vehicle keyswitch is turned ON, and the diagnostic switch is OFF, both fault lamps will illuminate to check their operation. The fault lamps will go off after about 2 seconds.
The CELECT™ system provides additional electronic features that enhance engine and vehicle performance and control.
The features include cruise control, power take-off (PTO), gear-down protection, progressive shifting, OptiCruise™, automotive/variable-speed governor, low-idle adjustment, idle shutdown, idle shutdown on PTO, idle shutdown override, engine protection shutdown, and maintenance monitor. These are programmable features in the ECM. To alter these features or settings, refer to your Cummins Authorized Repair Location.
cruise control feature gives the driver the capability of a foot-off accelerator cruise operation. It is similar to an automobile cruise control. The setting options are YES and NO.
power take-off (PTO) feature controls the engine at a constant rpm selected by the operator. For applications needing the PTO mode, a remote-mounted switch can be used where a cab switch is
not desirable. Use the cruise control switches to set PTO engine speed.
light-load PTO percent fuel is the parameter that sets the percent fuel threshold below which PTO will
not be limited by maximum engine speed without VSS. PTO operation that requires more fuel than this value will be limited by maximum engine speed without VSS. PTO operations that require less fuel than this value will
not be limited by maximum engine speed without VSS.
The original factory programmed value is 25 percent.
Certain applications require high-speed (i.e., 1900-rpm engine speed)
PTO operation with light to moderate fueling to power pump-off equipment.
gear-down protection feature limits the vehicle speed in the lower gears. The maximum vehicle speed in the lower gears is set at a lower mph than the maximum vehicle speed in the top gear. This encourages
driving in the top gear for better fuel economy. The parameters gear-down
maximum vehicle speed, light engine load, and heavy engine load are associated
with this feature.
top transmission gear ratio is a parameter needed in order for gear-down protection to work properly with double overdrive transmissions.
This parameter will also be used by the Trip Information System to record
the percentage of distance traveled in top gear.
gear-down maximum vehicle speed, light engine load (3), is the maximum vehicle speed for operating one gear below top gear during light engine load operations. This value can
not exceed gear-down maximum vehicle speed, heavy engine load (2).
The original factory programmed value is 89 km/h [55 mph] for M11 and N14 engines.
gear-down maximum vehicle speed, heavy engine load (2),
is the maximum vehicle speed for operating one gear below top gear during heavy engine load operations. This value can
not exceed maximum vehicle speed in top gear (1).
The original factory programmed value is 93 km/h [58 mph] for M11 and 97 km/h [60 mph] for N14.
progressive shifting feature limits the engine acceleration while accelerating up through the gears. This promotes fuel economy. Although the progressive shift is limiting the acceleration in the upper gears, the effects are slight compared to the effects in the lower gears.
maximum progressive shift rpm at 0 mph is a parameter that defines the start point of the progressive shift line. The engine acceleration
rate is decreased when engine rpm reaches this point.
The original factory programmed value is 1600 rpm.
maximum progressive shift rpm is a parameter that helps define the slope for the progressive shift line as shown in the diagram.
The original factory programmed value is 1800 rpm.
The
mph at maximum progressive shift rpm is a parameter that defines the end point of the progressive shift line. Although engine
acceleration is controlled above this speed, its effects are minimal in the
upper gears.
The original factory programmed value is 32 km/h [20 mph].
maximum engine speed without VSS sets the maximum engine speed allowed when no vehicle speed is detected.
The original factory programmed value is 2500 rpm.
NOTE: PTO can operate above this speed at light engine loads if a value greater than zero is entered for percent fuel threshold for light-load PTO. Maximum engine speed without VSS will
not limit engine speed when operating
in PTO if the percent fuel is less than the value entered for percent fuel
threshold for light-load PTO.
speed sensor type tells the ECM what type of VSS is used in the vehicle. The sensor is either electrical (magnetic pickup) or mechanical (Mini-gen). If mechanical is selected, then pulses per mile in
the ECM will automatically be set to 30,000.
The original factory programmed type is magnetic pickup.
VSS antitampering (Fault Code 242) is a feature that gives the customer the option of disabling Fault Code 242.
NOTE: Fault Code 242 is logged when an invalid or inappropriate vehicle speed signal is detected by the ECM, indicating an intermittent connection or signal
tampering. This fault code is
not a guarantee that vehicle speed
sensor tampering has been performed.
application type feature selection tells the ECM what type of application is being used in this vehicle. Choose between on-highway or on/off-highway. On-highway applications are those that use top gear for the majority of their operations. On/off-highway applications are those that use gears lower than top gear for the majority of their operations.
The original factory value is NO for on/off highway.
Combined features are available for automotive and industrial CELECT™.
The
automotive/variable-speed (VS) governor feature gives the owner a choice of engine governors. The automotive governor operates like a conventional power take-off (PTO) governor, which provides constant fueling for a given accelerator position. (Engine speed varies with load.) The vehicle speed (VS) governor maintains a constant engine speed for a given accelerator position under varying load conditions.
The original factory programmed value is AUTOMOTIVE.
low-idle speed is the speed at which the engine will idle. This speed can be adjusted by a cab switch if the switch is installed and the low-idle adjust feature is enabled.
The original factory programmed value is:
600 rpm for N14 330 to 370 horsepower and 330 ESP
650 rpm for N14 410 to 525 horsepower and 370 to 435 ESP
idle shutdown feature automatically shuts off an engine after a period of engine idling when there is no activity from the driver such as clutch, brake, or accelerator actuation.
The idle shutdown system will
not be active at coolant temperature below 43.3°C [110°F].
After an engine has been automatically shut off, the key
must be turned off for 5 seconds before attempting a restart.
The original factory programmed value is NO.
NOTE: This feature will shut off the engine
only. It will
not remove power from other accessories powered by the keyswitch; these can cause a drain on the battery.
idle shutdown time is the period of engine idling time when there is no activity from the driver such as clutch, brake, or accelerator actuation before the engine automatically shuts off.
The original factory programmed value is 60 minutes.
NOTE: This parameter will
not appear if the idle shutdown feature is turned OFF.
idle shutdown in PTO feature automatically shuts off the engine after a period of PTO or remote PTO operation when there is no activity from the driver such as clutch, brake, or accelerator actuation.
There are two road speed and cruise control governors available:
OptiCruise™/standard governors. The OptiCruise™ and the standard governor option provides two different vehicle speed controls while operating in hilly terrain.
The OptiCruise™ option is used to improve fuel economy and reduce the “harshness” of power changes when operating in cruise control or road speed governor. This option causes up to 2.5-mph loss of uphill road speed with full power in rolling terrain. OptiCruise™ also allows fueling up to 3.0 mph above the governor set point in light-load or downhill situations.
not cause a loss of road speed in rolling terrain. The standard option also allows fueling up to 3.0 mph above the governor set point in light-load or downhill situations.
automotive/variable-speed (VS) governor feature gives the owner a choice of engine governors. The automotive governor operates like a conventional PTO governor, which provides constant fueling for a given throttle position. (Engine speed varies with load.) The VS governor maintains a constant engine speed for a given throttle position under varying load conditions.
This is a programmable feature in the ECM. To alter this feature or setting, refer to your nearest authorized repair location.
engine protection system. The system monitors critical engine temperatures and pressures, and will log diagnostic faults when an over or under normal operation condition occurs. If an out-of-range condition exists, and engine derate action is to be initiated, and the operator will be alerted by an in-cab warning light. The warning light will blink or flash when out-of-range conditions continue to get worse. The driver
must pull to the side of the road, when it is safe to do so, to reduce the possibility of engine damage.
engine protection shutdown feature automatically shuts off the engine when the temperature, pressure, and coolant level sensors indicate the engine is operating over or under normal operating conditions.
The engine protection lamp in the cab will flash for 30 seconds prior to shutdown to alert the driver.
NOTE: The maintenance monitor is designed to alert the operator of the need for a routine maintenance stop. Maintenance records must still be maintained for historical purposes.
NOTE: The maintenance monitor uses data received from the vehicle speed sensor
(VSS) to determine distance and data from the ECM to determine the amount of fuel burned. Whenever a VSS, injector circuit, or battery voltage fault has occurred, the maintenance monitor data can be inaccurate.
The maintenance monitor is an optional feature that will alert the operator when it is time to change oil and perform any other simultaneous maintenance tasks. The maintenance monitor continuously monitors the distance the vehicle has traveled, the time the engine has been operating, and the amount of fuel burned to determine when it is time to change oil.
The operator
must still be alert for any indications that the engine needs other service.
automatic mode alerts the operator when it is time to change oil based on a Cummins-recommended interval. It determines the maintenance interval based on distance traveled, engine operating time, and fuel burned.
When the automatic mode is selected, the severe oil drain interval duty cycle is the default.
Refer to Oil Drain Intervals in Section V of the Operation and Maintenance Manual, N14 Engines Bulletin, 3666061, and M11 Engines, Bulletin 3666072, when selecting the correct oil change interval for your application. Cummins, Inc. does not recommend exceeding these published intervals and is not responsible for damage sustained due to overextended drain intervals.
distance mode allows the customer to enter a desired distance interval. The maintenance monitor will then monitor the distance the engine has traveled and alert the operator when the interval has been consumed.
NOTE: This mode of the maintenance monitor requires the use of a VSS. This mode
must not be selected for applications that do
not have this sensor.
The original factory programmed value is M11 = 10,000 miles and N14
= 12,000 miles.
Refer to Oil Drain Intervals in Section V of the Operation and Maintenance Manual, N14 Engines Bulletin, 3666061, and M11 Engines, Bulletin 3666072, when selecting the correct oil change interval for your application. Cummins, Inc. does not recommend exceeding these published intervals and is not responsible for damage sustained due to overextended drain intervals.
time mode allows the customer to enter a desired time interval. The maintenance monitor will then monitor the time the engine has been operating and alert the operator when the interval has elapsed.
The original factory programmed value is M11 = 250 hours and N14 =
300 hours.
Alerting the operator: The maintenance monitor will alert the operator of the need to change oil by flashing the engine protection lamp
(fluids lamp) for approximately 12 seconds after keyswitch ON. The flashing sequence will be three consecutive flashes followed by a pause. This flash sequence will go through five cycles in the 12-second period. This sequence will occur at every keyswitch ON until the maintenance monitor has been reset.
NOTE: The diagnostic switch must be in the OFF position for the flashing sequence to occur.
Maximum Threshold is entered by the user either directly using the manual distance or time mode, or by entering the interval factor in the automatic mode.
The
Adjusted Threshold is the new threshold set automatically by the maintenance monitor when automatic mode is selected. Maintenance monitor automatically reduces the maintenance interval when the engine is operating outside the optimum oil temperature range. The longer the engine operates outside optimum oil temperature, the more the adjusted threshold is reduced.
The
Interval Reset At is the length of the maintenance interval at the time the maintenance monitor was reset.
Cumulative Reset At is the total distance, time, and fuel recorded by the ECM at the time the maintenance monitor was reset.
The
Possible Error will contain an “X” next to a row of data that can be inaccurate due to a system fault. The “X”
will be triggered when a vehicle speed sensor fault, injector fault, or power-down fault occurs. These faults can cause data to accumulate inaccurately.
Maintenance monitor interval alert percentage: This allows the user to enter the percentage of the present interval at which time the light should come on, indicating the need for an oil change. The parameter allows the user to obtain an early warning of the need for a maintenance stop.
For Example: If the distance mode is set at 24194 km [15,000 mi] and the Interval Alert Percentage is set to 90 percent, the lamp will illuminate at 21,774 km [13,500 mi] (90 percent of 15,000).
The original factory programmed value is 100 percent.
only in the Maintenance Monitor Auto mode. It is used to adjust the maintenance interval for severe-, normal-, or light-duty applications. It is also used to extend the interval when using Premium Blue® 2000 oil or any other product that can extend maintenance intervals.
The CELECT™ system can show and record operating problems that can appear as fault codes. These codes will make troubleshooting easier. The fault codes are recorded in the ECM. They can be read using the two fault lamps in the cab panel or with INSITE™.
NOTE: Not all engine or CELECT™ problems are shown as fault codes.
The STOP fault light will be red. The WARNING light will be yellow or red, depending on the OEM’s preference. When the vehicle keyswitch is turned ON and the diagnostic switch is OFF, all three lights will illuminate to check their operation. The lights will go off in sequence after about 2 seconds.
The engine protection system will activate a warning device in the cab when an out-of-range condition occurs. The warning device is a light, a buzzer, or both.
If the engine protection system light or buzzer comes on while driving, it means a fault code has been recorded. The lamp will remain on as long as the fault exists, and engine power and speed will gradually be reduced. If the out-of-range conditions continue, the light will start to flash or blink. If the engine protection shutdown feature is enabled, the engine will be shut down to help prevent engine damage.
Turn off the vehicle. To check for engine electronic fuel system and engine protection system fault codes, move the diagnostic switch to the ON position, or connect the shorting plug into the diagnostic connector.
The fault code will flash in the following sequence:
First, a WARNING (yellow) light will flash. Then there will be a short 1- or 2-second pause after which the number of the recorded fault code will flash in the STOP (red) light. There will be a 1- or 2-second pause between each number. When the number has finished flashing in red, a yellow light will appear again. The three-digit code will repeat in the same sequence.
The lights will continue to flash the same code until the system is told to do something else. To go to the next fault code, move the IDLE SPEED ADJUST switch momentarily to the increment (+) position. You can go back to the previous fault code by momentarily moving the IDLE SPEED ADJUST switch to the decrement (-) position. If
only one active fault is recorded, the CELECT™ system will continually flash the same fault code when either (+) or (-) switch is depressed.
not using the diagnostic system, turn off the diagnostic switch, or remove the shorting plug. If the diagnostic switch is left on or the shorting plug in, the ECM will
not log some faults. The maintenance monitor will
not function correctly.
To stop the diagnostic system, move the diagnostic switch to OFF. Turn
the vehicle keyswitch OFF.
Hello, I'm Jack, a diesel engine fan and a blogger. I write about how to fix and improve diesel engines, from cars to trucks to generators. I also review the newest models and innovations in the diesel market. If you are interested in learning more about diesel engines, check out my blog and leave your feedback.
View all posts by Jack
CAUTION 
