Specifications
I & M BULLETIN
CMCCU-004
BASIC CONTROLLER
Page 10 of 10
TROUBLESHOOTING INSTRUCTIONS
The following items may be helpful in
determining what caused the various
symbols to illuminate on the controller
display.
Power LED fault
The “Power LED” should be illuminated
when the Engine Ignition Switch/Key is in
every position other than the OFF position.
If this is not the case, check the following
items:
With the Engine Ignition Key in
every position (other than OFF)
check the wire connected to pin 7
on the back of the controller for
voltage. If no voltage is found,
check for a cut wire or check Engine
Ignition Key terminal connections.
Check that the wire connected to pin
1 on the back of the controller is
connected directly to the positive (+)
terminal of the battery with no break
in the wire.
Check that the wire connected to pin
2 on the back of the controller is
connected directly to the negative
(-) terminal of the battery with no
break in the wire.
Check that the wire connected to pin
7 on the back of the controller is not
losing momentary power while the
engine is cranking.
Engine Speed Detected LED fault
While the engine is running the “Engine
Speed Detected” LED must be illuminated.
If this is not the case, check the following
items:
Check that the 3-dials on the back
of the controller are set correctly to
match the tooth count of the
flywheel ring gear.
HPTO 8 – has 72 teeth.
HPTO10- has 72 teeth.
HPTO 12 – has 59 teeth.
For 072 teeth, set the dials as follows:
0 7 2
Check the speed pickup that is
installed in the bottom of the HPTO
bell housing. Align a flywheel tooth
directly centered in the bell housing
hole and then screw in the speed
pickup until it stops, then back out 3
turns. While tightening locknut,
make sure that the speed pickup
does not move.
Check the wire running from the
speed pickup to the back of the
controller to insure that the wire is
not cut. This wire must be
shielded wire.
Check that the bare metal wire
(drain) is connected at pin 11 on the
controller and NOT connected at the
speed pickup end.
Remove speed pickup and check