Cummins ISB CM550 (1990-94) Fault Code: 599 PID: SID 025 SPN: 640 FMI: 14 Auxiliary Commanded Dual Output Shutdown – Special Instructions

Circuit Description
Dual outputs based on sensed parameters provide up to two independent switched outputs for
original equipment manufacturer (OEM) use. The state of each switched output can be
determined by different inputs to the engine control module (ECM) depending on the engine
platform. The ECM can provide different outputs to OEM devices if any of the inputs are above
or below calibrated thresholds. Each switched output is independent of the other with respect
to control parameter input and threshold settings.

Component Location
The dual outputs features are OEM dependent. Use the following for a detailed component
location view. See equipment manufacturer service information.

Shop Talk
This fault code is activated when one of the OEM defined inputs has exceeded a calibratible
limit. The triggers for shutdown are OEM dependent.