DIAGNOSTIC STATUS CODES
SX TRANSISTOR CONTROL
Page
15
April 1999
Section 4.3 Recommended Lubrication of Pins and
Sockets Prior to Installation
Beginning in January of 1999, GE will implement the
addition of a lubricant to all connections using pins and
sockets on EV100/EV200 and Gen II products. Any
connection made by GE to the A, B, X, Y, or Z plugs will
have the lubricant NYE 760G added to prevent fretting of
these connections during vehicle operation.
Fretting occurs during microscopic movement at
the contact points of the connection. This movement
exposes the base metal of the connector pin which, when
oxygen is present, allows oxidation to occur. Sufficient
build up of the oxidation can cause intermittent contact
and intermittent vehicle operation. This can occur at any
similar type of connection, whether at the control or in any
associated vehicle wiring, and the resultant intermittent
contact can provide the same fault indication as actual
component failure.
The addition of the NYE 760G lubricant will prevent
the oxidation process by eliminating the access of oxygen
to the contact point. GE recommends the addition of this
lubricant to the 12 pin and 23 pin plugs of all new Gen II
controls at the time of their installation into a vehicle
When servicing existing vehicles exhibiting
symptoms of intermittent mis-operation or shutdown by the
GE control, GE recommends the addition of this lubricant to
all 12 and 23 pin plugs, after proper cleaning of the
connectors, as a preventative measure to insure fretting is
not an issue before GE control replacement.
Section 4.4 General Troubleshooting Instructions
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.
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.
