TECHNICAL INFORMATION
WORLD TRANSMISSION (WT)
DIAGNOSTIC CODES
The WT Diagnostic Code Memory List contains
the following headings: Code List Position, Main
Code, Sub Code, Active indicator, Ignition Cycle
Counter and Event counter. Up to five (5) codes
can be stored at the same time in this memory.
The last occurring codes are listed first.
Accessing the code list position, main code, sub
code and active indicator is done through the
Shift Selector Display or by using the Pro-Link
Diagnostic Tool. Access to the ignition cycle
counter and event counter can be done only
through the Pro-Link diagnostic tool. The
following table is an example of the information
stored in memory.
DIAGNOSTIC CODE MEMORY LIST
Displayed on Shift Selector Display and
Diagnostic Tool
ACTIVE =
Ignition cycle counter and event
counter are not available on
Note: All information stored in memory can be
accessed using the Pro-Link Diagnostic Tool.
Note: The diagnostic codes are stored in the
memory queue in positions 1 through 5. The
location of a diagnostic code in the memory
queue is identified by "d1" (diagnostic code #1)
through "d5".
The following paragraphs define the different WT
Diagnostic Code Memory List headings:
MAIN CODE
The general condition or area of fault detected
by the ECU.
SUB CODE
The specific area or condition under the Main
Code in which the condition was detected.
ACTIVE INDICATOR
Illuminates when a fault condition is active (Shift
Selector will display MODE ON or the Pro-Link
Diagnostic Tool will display YES). The indicator
will extinguish when the fault condition is gone.
IGNITION CYCLE COUNTER
Used to clear inactive diagnostic codes from the
code list in memory. The counter is incremented
each time a normal ECU power-down occurs
following the clearing of the active indicator. A
diagnostic code will be cleared from the list
when the counter exceeds 25.
EVENT COUNTER
Used to record the number of times a diagnostic
code occurs prior to the incident being cleared
from the code list. The last occurring code will
be stored in position "d1". If the most recent
code is already in the code list, that code will be
moved to position "d1". The Active Indicator will
illuminate (Shift Selector will display MODE ON
or the Diagnostic Tool will display YES), the
Ignition Cycle Counter will be cleared and "1" will
be added to the Event Counter.
CODE READING AND CLEARING
Diagnostic codes can be read and cleared by
two methods: by using the Pro-Link 9000
Diagnostic Tool plugged into the receptacle
located in the driver's footwell or by using the
Shift Selector Display. The operation of the Pro-
Link 9000 Diagnostic Tool is described in the
user's manual provided with the Tool. This
section describes how to read and clear codes
using the Shift Selector Display.
The Diagnostic Display Mode can be entered for
viewing codes at any speed. Codes can only be
cleared when the output speed = 0 and no
output speed sensor failure is active.
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