316 Electrical System
Multiplex System-Related Interventions
The following interventions will enhance the effectiveness and efficiency of the multiplex control
system.
IFM Program Update Process
Occasionally, the Labrie IFM multiplex control system program may require modification or
updating. If a revision to the control system program is required, the following list of action items
must be addressed prior to making a program change:
Verify the program number and revision currently installed.
• Place the vehicle ignition key in the on/run position. When the IFM display shows its home
screen, press the button below “Menu" on the IFM display. The system “MAIN MENU” screen
will appear.
• Using the up/down arrow on the IFM display module, highlight “Program Version”, and press
the button below “OK”.
• The current program and revision is listed next to “Module 10 =”. The program number should
match the new program to be installed, the revision number will be different (example: if the
program number currently installed is “10_10922”_R3”, the new, updated program number to
be downloaded would have a higher revision; i.e. “10_10922_R4”).
• Press the button below “Esc” to return to the “MAIN MENU” screen.
Verify the current baud rate setting.
NOTE: This setting must match the chassis baud rate. Otherwise, the J1939 CAN data bus
communication can be corrupted.
• In the “MAIN MENU” screen, using the up/down arrow button on the IFM display module,
highlight “Settings”, and press the button below “OK”. The “Settings” screen will appear.
• Using the up/down button, highlight “J1939 Baud rate”, and press the button below “OK”. The
“J1939 Baud rate” screen will appear. Note the current “Baud rate”; either 250 or 500.
Upload the program that is currently installed prior to re-programming. To do so, use Service
Kit 01208.
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