TECHNICAL INFORMATION
WORLD TRANSMISSION (WT)
DIAGNOSTIC CODES
D
IAGNOSTIC
C
ODE
M
EMORY
L
IST
(WT)
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 through the Pro-Link
Diagnostic Tool. Access to the ignition cycle
counter and event counter is through the Pro-
Link diagnostic tool only. The following table is
an example of the information stored in memory.
D
IAGNOSTIC
C
ODE
M
EMORY
L
IST
Code List
Position
Main Code
Sub Code
Active Indicator
Ignition Cycle
Counter
Event Counter
d1
21
12
YES
00
10
d2
41
12
YES
00
04
d3
23
12
NO
08
02
d4
34
12
NO
13
01
d5
56
11
NO
22
02
Displayed on Shift Selector Display and
Diagnostic Tool
"YES"=ACTIVE
=
"MODE ON"
Ignition cycle counter and event
counter are not available on Shift
Selector Display
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
8-7