Problem Probable Causes Corrective Action
MIB board
alternating “N” and
“r”.
Network error on the CAN bus
communication.
A. Ensure the CAN bus system is
terminated at BOTH ENDS (on the
M2007 connector J6 and on the ATO
board connector J10) with a resistor
equipped 6-pin connector. The resistor
can be shorted. If so, remove the
shrink wrap and ensure that the resistor
leads are not touching.
B. Ensure all 6-pin CAN connectors are
tight between the M2007 (J6 and J7),
MIB (J1 and J2), AIF (J4 and J5) and
ATO (J10) boards.
C. Check continuity between each color
wire on the CAN connectors into J7 on
the far right computer and J10 on back
of the ATO board (black to black,
white to white, and red to red), and
ensure there is no continuity between
different color wires (black to red, red
to white, and white to black).
D. Ensure black computer locator wires
are connected from ground to correct
pin position (see drawing 8051656
page 34 and 35).
E. Ensure all boards have the corner
ground wire attached and tightened.
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