Engine Optional Features - Navistar MaxxForce 7 Operation And Maintenance Manual

Engine Features (cont.)
Fast Idle Advance
Fast idle advance increases engine idle speed for faster
warm-up to operating temperature. This occurs when the ECM
monitors Engine Coolant Temperature (ECT) sensor input and
adjusts fuel injector operation accordingly.
Low idle speed is increased proportionally when the ECT is
below 104°F ( 40°C) at 700 rpm to below 32°F (0°C) at 900 rpm
maximum.
Service Diagnostics
The Electronic Service Tool (EST) communicates with the control
system through the public Controller Area Network (CAN). The
EST allows the user to retrieve and clear fault codes, run special
diagnostics tests, monitor control system sensors and actuators,
update control system software, and adjust special features.
Service Interval
The service interval feature is designed to provide a visual
reminder to the operator that the engine oil change interval
has expired and routine maintenance procedures should be
performed.
The term "interval" in this case is used to describe the distance,
time, or fuel used between the last maintenance performed on
the vehicle and the next maintenance that is due.
Page 24
SECTION 1 – ENGINE SYSTEMS
It is essential that operators are trained to know the maintenance
schedules and instructions regarding the operation and reset
functionality of the service interval for the feature to be effective.
For further information see Resetting Change Engine Oil Service
Interval Message (page 76).

Engine Optional Features

Cruise Control with Hardwire Cruise Switches
The Engine Control Module (ECM) controls the cruise control
feature. The cruise control system functions similarly for all
electronic engines. Maximum and minimum allowable cruise
control speeds will vary based on application. To operate cruise
control, see appropriate Vehicle Operator Manual.
Engine Fan Control
The engine fan control commands higher air flow through the
radiator when the Air Conditioner (A/C) is on or when the coolant
or inlet air temperature goes above a set temperature.
Engine Assisted Windshield Defrost (EAWD)
EAWD is an automated feature that assists windshield defrosting
during cold ambient temperatures by increasing engine rpm to
heat up the engine faster.