Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 236
18.2 Connection and Use of the J1939 CAN Bus
There is one J1939 Datalink available for customer connection on each of the
engine families and this is CAN A. The CAN A datalink can therefore be used
to connect the engine ECM to machine controllers, transmission controllers,
instrumentation gauges etc. All of the general installation criteria for a CAN
network detailed in section 18.1 applies for this datalink and the ECM J1
connection points are shown below in table 18.1.
ECM J1 Pin Number
Function
26 CAN A (-)
25 CAN A (+)
Table 18.1 ECM J1 CAN A Connection List
Figure 18.1 also gives an example of a typical CAN network layout. It should
be noted that the 120Ohm termination resistors are to be located at either end
of the CAN bus.
Figure 18.1 Example CAN Network Layout