INSTALLATION AND OPERATION
SX TRANSISTOR CONTROL
Page
15
Section 4.4 General Troubleshooting Instructions
Trouble-shooting the ZX 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.
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.
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.
Tools and test equipment required are: clip leads,
volt-ohm meter (20,000 ohms per volt) and basic hand
tools.
Updated Sept 2019
