Electronic Governor Control
International® engines are electronically controlled for all operating ranges.
American Trucking Association (ATA) Datalink
Vehicles are equipped with the ATA datalink connector for communication between the Electronic Control
Module (ECM) and the Electronic Service Tool (EST).
The ATA datalink supports:
• Transmission of engine parameter data.
• Transmission and clearing of Diagnostic Trouble Codes (DTCs).
• Diagnostics and troubleshooting.
• Programming performance parameter values.
• Programming engine and vehicle features.
• Programming calibrations and strategies in the ECM and Injector Drive Module (IDM).
For additional information, see “ATA Datalink” in Section 7 (page 309).
Service Diagnostics
The EST provides diagnostic information using the ATA datalink.
The recommended EST is the EZ-Tech® with MasterDiagnostics® software provided by International®.
Faults from sensors, actuators, electronic components, and engine systems are detected by the ECM and sent to the EST as DTCs. Effective engine diagnostics require and rely on DTCs.
Event Logging System
The event logging system records engine operation above maximum rpm (overspeed), high coolant temperature, low coolant level, or low oil pressure.
The readings for the odometer and hourmeter are stored in the ECM memory at the time of an event
and can be retrieved using the EST.
Electronic Speedometer and Tachometer
The engine control system calibrates vehicle speed up to 157,157 pulses per mile. The new speed calibration
information must be programmed with an EST.
The tachometer signal is generated by the ECM by computing signals for the Camshaft Position (CMP) sensor and Crankshaft Position (CKP) sensor. Calculations for each sensor are sent to the instrument panel through the Drivetrain Datalink (CAN 1) and to the EST through the ATA datalink.
Inlet Air Heater
The inlet air heater feature improves engine start-up in cold weather. The ECM controls the intake air
heater and monitors the engine temperature. When the engine is ready for cranking, the ECM sends a message to shut off the WAIT TO START lamp.
For additional information, see “IAH System” in Section 7 (page 444).
Fast Idle Advance
Fast idle advance increases engine idle speed up to 750 rpm for faster warm-up to operating temperature. This occurs by the ECM monitoring the EOT sensor input and adjusting the fuel injector operation accordingly.
Low idle speed is increased proportionally when the engine oil temperature is between 15 °C (59 °F) at
700 rpm to below -10 °C (14 °F) at 750 rpm.
Cold Ambient Protection (CAP)
CAP protects the engine from damage caused by prolonged idle at no load during cold weather. CAP
also improves cab warm-up.
CAP maintains engine coolant temperature by increasing the engine rpm to a programmed value when the ambient air temperature is at or below 0 °C (32 °F) and the engine coolant temperature is below 65 °C (149 °F) while the engine has been idling with no load for more than 5 minutes.
CAP is standard on trucks without an Idle Shutdown Timer (IST).
Coolant temperature compensation reduces fuel delivery if the engine coolant temperature is above
the cooling system specifications. Before standard engine warning or optional warning/protection systems engage, the reduction in fuel delivery begins when the engine coolant temperature reaches approximately 107 °C (225 °F).
A rapid reduction of 15 percent is achieved when engine coolant temperature reaches approximately 110 °C (230 °F).
NOTE: Coolant temperature compensation is disabled in emergency vehicles that require 100 percent power on demand.
Engine Crank Inhibit (ECI)
ECI will not allow the starting motor to crank when the engine is running or the automatic transmission
is in gear. ECI is an optional system for vehicles with manual transmissions.
For additional information, see “ECI System” in Section 7 (page 366).
Change Engine Oil Interval Message
The change engine oil interval message can be programmed with the EST for mileage, hours, or
amount of fuel used. The change oil message timer can be reset using the CRUISE ON and RESUME/ACCEL switches or EST.
