World Transmission (Wt) Diagnostic Codes - PREVOST H3-41 Manual

WORLD TRANSMISSION (WT) DIAGNOSTIC CODES

Diagnostic Code Memory
Diagnostic codes are stored in a list in memory (sometimes referred to as a queue). The last occurring
codes are listed first. Up to five codes can be stored in memory. 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.
Code List Main Code
Position
d1
d2
d3
d4
d5
Displayed on shift selector display and diagnostic
tool
NOTE: All information stored in memory can be accessed using the Pro-Link diagnostic tool.
Definitions of Diagnostic Codes
Diagnostic codes are defined as follows:
Code list position:
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".
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
be extinguished when conditions exist that
indicate the fault condition is gone.
Sub Code
21 12
41 12
23 12
34 12
56 11
Active Indicator Ignition Cycle
YES
YES
NO
NO
NO
Ignition cycle counter and event
"YES"=ACTIVE
counter are not available on shift
=
selector display
"MODE ON"
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.
8-11
TECHNICAL INFORMATION
Event Counter
Counter
00 10
00 04
08 02
13 01
22 02