SECTION 1 – ENGINE SYSTEMS
Engine Features
Aftertreatment System
The engine a nd vehicle exhaust piping includes an
Aftertreatment System to capture soot and other particulates
before they exit the exhaust pipe. The soot is captured by the
Diesel Particulate Filter (DPF) and is periodically converted to
carbon dioxide (CO
2
) by a Regeneration (Regen) process. For
further information see Aftertreatment System (page 52).
Cold Ambient Protection (CAP)
CAP keeps the engine warm during cold temperatures and
may provide better fuel economy, increased operator comfort,
and improved engine performance. This feature should only
be disabled for specialized applications. Engine damage may
occur if CAP is disabled.
CAP maintains engine coolant temperature by increasing engine
rpm to a programmed value when ambient air temperature is
below 0 °C (32 °F), coolant temperature is below 65 °C (149 °F),
and engine has been idling at no load for over five minutes.
For further information see Cold Ambient Protection (CAP) (page
55).
Electronic Governor Control
The governor controls engine rpm within a safe and stable
operating range.
The low idle governor prevents engine rpm from dropping
below a stable sp eed to prevent stalling when various loads are
demanded on the engine.
The high idle governor prevents engine rpm from going above a
safe speed that would cause engine damage.
Electronic Service Tool (EST) Interface
Engines are equipped with the EST interface for communication
between the Engine Control Module (ECM) and the EST.
CAN is a J1939 serial bus s yst em, also know as the Drivetrain
Datalink. The public Co ntro ller Area Network (CAN) provides a
communication link between all connecting modules by sending
and receiving messages.
The EST with ServiceMaxx™ software communicates with the
ECM through th e EST interfac e. The EST, through the public
CAN, is able to retrieve Diagnostic Trouble Codes (DTCs), run
diagnostic tests, and view Parameter Identifiers (PIDs) from all
inputs and outputs of the ECM.
CAN public supports the following functions:
• Transmission of engine parameter data
• Transmissio n and clearing of DTCs
• Diagnostics and troubleshooting
• Programming performance parameter values
• Progra mming engine and veh icle features
• Programming calibrations and strategie s in the ECM
Form No. 1172040R1
Printed in the United States of America Page 19
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