Cummins ISX11.9 CM2250 – Service Manual 014-008 Engine Testing (In Chassis)

The Setup for Dynamometer function is used to prepare the engine ECM for an advanced diagnostic test run on the chassis dynamometer. For purposes of this test, the maximum engine speed without Vehicle Speed Sensor (VSS), the maximum vehicle speed in top gear, and the maximum vehicle speed in lower gear are set to their maximum values. The idle shutdown feature is disabled and the fan is locked in the ON mode. All of these values are automatically reset to their previous values when the engine keyswitch is turned to the OFF position.		SMALL \| MEDIUM \| LARGE

Maximum Engine Speed without VSS: 2500 rpm for testing purposes, this speed is temporarily set to the maximum value allowed.
Maximum Vehicle Speed in Top Gear: 120 mph for testing purposes, this speed is temporarily set to the maximum value allowed.
Maximum Vehicle Speed in Lower Gear: 120 mph for testing purposes, this speed is temporarily set to the maximum value allowed.
Gear-Down Protection: This feature is temporarily disabled for testing purposes.
Fan Clutch: On.
Idle Shutdown: This feature is temporarily disabled for testing purposes.

Some SAE J1939 electronic subsystems must be disabled. The user has the ability to enable or disable the SAE J1939 data link with the service tool.

Refer to the INSITE™ Help File for detailed setup for dynamometer instructions.