Can Communications (Controller Area Network) - Navistar International DT 466 Diagnostic/Troubleshooting Manual

348 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS

CAN Communications (Controller Area Network)

Figure 404 Function diagram for the CAN
The function diagram for the CAN includes the
following:
• Electronic Control Module (ECM)
• Drivetrain Datalink (CAN 1)
• Terminating resistors – 120 ohm
• Instrument panel (lamps)
Function
The Drivetrain Datalink is a Society of Automotive
Engineers (SAE) term referring to one of the datalinks
common to all trucks.
the communication link for the engine Electronic
Control Module (ECM), cab and chassis Electronic
System Controller (ESC), and the instrument panel.
The Drivetrain Datalink is also used for power train
communication and control.
The ECM transmits component information across
the Drivetrain Datalink to the instrument panel.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
The Drivetrain Datalink is
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
The following instrument panel components are in
constant communication with the Drivetrain Datalink:
• Oil pressure gauge
• Engine oil temperature gauge
• Tachometer
• Speedometer
• Odometer / hourmeter
• Coolant temperature gauge
• Coolant level lamp
• ENGINE lamp (red)
• ENGINE lamp (amber)
• Fuel filter lamp
• Change oil message
• Cruise / PTO control
• WAIT TO START lamp
EGES-270-1