0000-Module Offline (A.50.A.91 - G.30.B.10) - New Holland CX720 Repair Manual

0000-Module Offline (A.50.A.91 - G.30.B.10)
0000 - Module Offline
NOTE: If a control module never powers up and broadcasts its initial message, the other modules will not be aware
that it exists, and no "offline" alarm will be generated.
Cause:
Module offline
Possible failure modes:
1. Loss of module power.
2. CAN-related faults.
Solution:
1. There are two general conditions that may cause an individual module may go "offline"; loss of module power,
or CAN-related faults.
Each module requires a power and ground supply to provide main operating power for the module; if either of
these is lost, the module will power down and will not be active on the network.
There are several possible CAN-related faults that may cause a module to go offline. External problems include
bad or open connections to the CAN HI and CAN LO network wires as a result of damaged wiring. Internal
problems may include a failure of the CAN controller itself (the device that actually does the "communicating"
on the network), or the module may be "bussing off" due to excessive error messages.
Whenever a module transmits or receives a faulty message, it keeps a record of that error. After its error history
fills up, the CAN controller assumes that it is faulty, and will stop transmitting on the network (module has gone
"Bus Off"); this will set the alarm off. This error history is erased and reset at zero when the module is powered
down.
Note: If the Infoview monitor module (MDM) is offline, all icons will be grayed out on screen, and monitor will be
non-responsive to keypad on RHM.
A. Verify module is offline by navigating to the "Service Info\Network" screen, and confirm that module icon
is grayed out.
2. Turn the key switch off, and back on again. Immediately navigate back to the "Service Info\Network" screen,
and recheck the module status.
DISTRIBUTION SYSTEMS - ELECTRONIC SYSTEM
A.50.A / 74
1
20014718
2 4/7/2006