PREVOST H3-41 Manual page 100

TECHNICAL INFORMATION
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.
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.
Clearing Codes
Clearing the Active Indicator and Code Records
from the Code List in Memory:
If the conditions causing a diagnostic code are
cleared, the active indicator can be manually
cleared by holding the MODE push-button down
continuously for 3 seconds until a tone is heard
from the shift selector. To clear code records
from the list, hold the MODE push-button down
continuously for ten seconds until a second tone
sounds. All diagnostic records in the list that are
inactive will then be cleared and the remaining
records will then move up the list.
Code Reading and Code Clearing
Procedures:
Diagnostic codes can be read and cleared by two
methods: by using the Pro-Link 9000 diagnostic
tool plugged into the receptacle located on the
L.H. control panel; 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.
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.
The following describes how to read and clear
codes using the shift selector display:
Reading Codes:
Read codes as follows:
1. Enter the diagnostic display mode by
pressing both the " " (up arrow) and " "
(down arrow) push-buttons at the same time,
twice on the push-button shift selector.
NOTE :
To obtain the oil level, press the " "
(up arrow) and " " (down arrow) push-buttons
once, at the same time.
Sensor (OLS) Codes" in this chapter.
2. Read the first code in the first of the five
code positions on the digital display of the
shift selector. For example, code "25 11" is
stored in the first position. The display will
change every two seconds as follows:
a. Code list position = "d1"
b. Main code = "25"
c. Sub code = "11"
d. Display will repeat steps a., b. and c.
3. Press the MODE push-button momentarily to
view the second position (d2) as described
in step 2.
8-10
This section describes
Refer to "Oil Level