DIAGNOSTIC STATUS CODES
IT TRANSISTOR CONTROL
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Proper sequence for use in tightening hardware
during control mounting
November 2005
With the status code number, follow the procedures
outlined in the status code instruction sheets to
determine the problem.
Important Note: Due to the interaction of the logic
card with all vehicle functions, almost any status
code or control fault could be caused by the logic
card. After all other status code procedures have
been followed and no problem is found, the controller
should then be replaced as the last option to correct
the problem.
The same device designations have been maintained
on different controls but the wire numbers may vary.
Refer to the elementary and wiring diagrams for your
specific control. The wire numbers shown on the
elementary diagram will have identical numbers on
the corresponding wiring diagrams for a specific
vehicle, but these numbers may be different from the
numbers referenced in this publication.
WARNING: Before trouble-shooting, jack up the
drive wheels, disconnect the battery and
discharge the capacitors. Reconnect the battery
as needed for specific checks. Capacitors
should be discharged by connecting a 200 ohm 2
watt resistor between the positive and negative
terminals on the control panel.
Section 4.4.6 Maintenance
If it is necessary to remove the control for service,
careful consideration must be given to removing the
old thermal compound from the control and mounting
surface, prior to replacement of the unit.
Never
re-
use thermal compound. Use a putty knife or similar
straight edge to carefully remove all thermal
compound residue without damaging either mounting
surface. Flush the surfaces with a liquid de-greaser
or parts cleaner and allow them to dry, before re-
applying the thermal compound and mounting the
control. Take care not to contaminate the surfaces
with hydraulic fluid or battery acid.
Check resistance on R x 1000 scale from frame to
power and control terminals. A resistance of less
than 20,000 ohms can cause misleading symptoms.
Resistance less than 1000 ohms should be corrected
first.
Before proceeding, visually check for loose wiring,
mis-aligned linkage to the accelerator switch, signs of
overheating of components, etc.
Section 4.5 General Troubleshooting Instructions
Tools and test equipment required are: clip leads,
volt-ohm meter (20,000 ohms per volt) and basic
hand tools.
Trouble-shooting the SX family of controls should be
quick and easy when following the instructions
outlined in the following status code instruction
sheets.
If mis-operation of the vehicle occurs, a status code
will be displayed on the Dash Display (for vehicles
equipped with a Dash Display) or made available by
plugging a Handset into the plug "Y" location, and
then reading the status code.
Note
: Status code numbers from 00 to 99 are
traction control status codes. Status codes with the
prefix 1 (101 to 199) are pump control status codes.
